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Helicity dependent Wigner phase shift for photoionization in a circularly polarized laser field J. Phys. B: At. Mol. Opt. Phys. (IF 1.655) Pub Date : 20220516
Run Wang, Qingbin Zhang, Chuanpeng Cao, Min Li, Kunlong Liu, Peixiang LuThe sensitivity of strongfield ionization to atomic orbital helicity has attracted much attention from physicists, due to its potential application in attosecond spectroscopy and spintronics. In order to intuitively observe the physical mechanisms of helicitydependent ionization rates during photoionization, the concept of the Wigner phase can be used to characterize the different interactions between

Spatial and spectral variations of highorder harmonics generated in noble gases J. Phys. B: At. Mol. Opt. Phys. (IF 1.655) Pub Date : 20220516
M Iqbal, G S Boltaev, N Abbasi, R A Ganeev, A S AlnaserWe report on the spatial and spectral variation of highorder harmonics generation from noble gases when driven by highrepetition rate femtosecond laser with different peak intensity and polarization states. Ar, Xe, and Kr were chosen for the generation of coherent extreme ultraviolet radiation. We observe that increasing the intensity of the driving pulses (DPs) leads to disappearance of harmonics

Controlled engineering of a vortexbright soliton dynamics using a constant driving force J. Phys. B: At. Mol. Opt. Phys. (IF 1.655) Pub Date : 20220516
Wenlong WangA vortexbright (VB) soliton can precess around a fixed point. Here, we find numerically that the fixed point and the associated precessional orbits can be shifted by applying a constant driving force on the bright component, the displacement is proportional to the force with a minus sign. This robust dynamics is then discussed theoretically by treating the VB soliton as an effective point particle

Angular shift of Autler–Townes doublet from multiphoton ionization of molecules by circularly polarized laser pulses J. Phys. B: At. Mol. Opt. Phys. (IF 1.655) Pub Date : 20220511
YaNan Qin, Min Li, Kun Liu, Jintai Liang, Yueming Zhou, Peixiang LuWe theoretically study the Autler–Townes (AT) splitting of a molecule in a circularly polarized laser pulse by solving the timedependent Schrödinger equation. We find that the AT doublet in the photoelectron momentum distribution reveals different angular shifts with respect to the molecular axis direction. Using an improved strongfield approximation method, we reproduce the difference of the angular

Disappearance of squeezing in superposition states and its manifestation in the energy density J. Phys. B: At. Mol. Opt. Phys. (IF 1.655) Pub Date : 20220511
S Kannan, C SudheeshWe have classified the superposition of squeezed wavepackets into two kinds and studied their quadrature squeezing. We have shown that the squeezing and higherorder squeezing in the quadrature disappear for the states of the first kind. However, for the second kind, it is possible to achieve the maximum amount of squeezing by adjusting the parameters in the superposition. The absence of squeezing

Differential elastic scattering crosssection of spinpolarized electron beams impinging on uranium J. Phys. B: At. Mol. Opt. Phys. (IF 1.655) Pub Date : 20220510
Maurizio DaporWe investigate the effects of spinpolarization on the differential elastic scattering crosssection (DESCS) of electrons impinging on uranium atoms using the relativistic partial wave expansion method. The calculations presented here were obtained using the POLARe code. Changes in the shape of the DESCS of keV electron beams due to the transverse spinpolarization of the beam are demonstrated to be

Electron collision studies on the CH2+ molecular ion J. Phys. B: At. Mol. Opt. Phys. (IF 1.655) Pub Date : 20220505
K Chakrabarti, J Zs Mezei, I F Schneider, J TennysonCalculations are performed for electron collision with the methylene molecular ion CH2+ in its bent equilibrium geometry, with the goal of obtaining cross sections for electron impact excitation and dissociation. The polyatomic version of the UK molecular Rmatrix codes was used to perform an initial configurationinteraction calculation on the doublet and quartet states of the CH2+ ion. Subsequently

Characteristics of the molecular abovethreshold ionization by a bichromatic elliptically polarized field with corotating components J. Phys. B: At. Mol. Opt. Phys. (IF 1.655) Pub Date : 20220504
D Habibović, A GazibegovićBusuladžić, M Busuladžić, D B MiloševićWe address ionization of a diatomic molecule by a bichromatic elliptically polarized field with corotating components. Using the strongfield approximation we investigate symmetry properties of the photoelectron momentum distribution and explore the minima which appear in the photoelectron spectra. We distinguish two types of minima: (i) twocenter interference minima which appear due to the destructive

Polarizationresolved analysis to solid highorder harmonic generation J. Phys. B: At. Mol. Opt. Phys. (IF 1.655) Pub Date : 20220429
Tengfei Huang, Liang Li, Jiapeng Li, Xiaosong Zhu, Pengfei Lan, Peixiang LuWe propose a quantitative polarizationresolved quantum trajectory approach to analyse the solid highorder harmonic generation (HHG). By using this approach, we can distinguish the ionization channels of different polarization components in HHG. We take the HHG in hBN under two counterrotating circularly polarized fields as an example. We find that the right and left circular polarized high harmonics

Emission enhancement of femtosecond laserinduced breakdown spectroscopy using vortex beam J. Phys. B: At. Mol. Opt. Phys. (IF 1.655) Pub Date : 20220429
Qiuyun Wang, Weijie Dang, Yuanfei Jiang, Anmin Chen, Mingxing JinThis paper used femtosecond Gaussian and vortex beams to ablate a Cu target and generate Cu plasmas. A Gaussian beam pulse is shaped into a vortex beam by a vortex wave plate (topological charge m = 1). The spectral intensity of Cu plasmas produced by the two lasers was measured, finding that the spectra with vortex beam were stronger than that with Gaussian beam. The spectral intensity was doubled

Periodic evolution of the Pearcey–Gaussian beam in the fractional Schrödinger equation under Gaussian potential J. Phys. B: At. Mol. Opt. Phys. (IF 1.655) Pub Date : 20220429
Ru Gao, Teng Guo, Shumin Ren, Pengxiang Wang, Yan XiaoThe dynamics of a Pearcey–Gaussian (PG) beam with Gaussian potential in the fractional Schrödinger equation (FSE) are investigated. In free space, varying the Lévy index offers a convenient way to control the splitting and bending angle of the beam. In the presence of Gaussian potential, with increasing propagation distance, the process is repeated in a breathlike motion. The periodicity also can

Shotbyshot 250 kHz 3D ion and MHz photoelectron imaging using Timepix3 J. Phys. B: At. Mol. Opt. Phys. (IF 1.655) Pub Date : 20220428
Hubertus Bromberger,Christopher Passow,David Pennicard,Rebecca Boll,Jonathan Correa,Lanhai He,Melby Johny,Christina Papadopoulou,Atia AtiaTulNoor,Joss Wiese,Sebastian H Trippel,Benjamin Erk,Jochen KüpperAbstract We demonstrate the application of eventdriven Timepix3based detectors in combination with a doublesided velocitymapimaging spectrometer to record the full 3D momentum of charged particles at the freeelectronlaser facility FLASH. We measured the XUV induced fragmentation of N2 using 250 kHz FLASH bursts with subpixel spatial resolution and up to 1.7 ns temporal resolution for photoelectrons

Quantum droplets in threedimensional Bose–Einstein condensates J. Phys. B: At. Mol. Opt. Phys. (IF 1.655) Pub Date : 20220428
Sherzod R OtajonovThe properties of 3D Bose–Einstein condensate have been studied with variational and numerical methods. In the variational approach, we use the superGaussian trial function, and it is demonstrated that this trial function is a good approach for providing the descriptions of the quantum droplets. The analytical equations for the variational parameters are obtained. The frequency of small oscillations

Photoelectron spectra of argon in circularly polarized pulses studied by atomVolkov strongfield approximation J. Phys. B: At. Mol. Opt. Phys. (IF 1.655) Pub Date : 20220428
TsinFu JiangWe studied the abovethreshold ionization (ATI) spectra of argon in circularly polarized pulse by the atomVolkov strongfield approximation (SFA). A dip appears in the spectra due to the presence of a zero in the dipole matrix element, corresponding to a transition from the ground state to the L = 2 continuum at electron kinetic energy ∼30.6 eV. No such dip appears when the timedependent Schrödinger

Fast, high precision dynamics in quantum optimal control theory J. Phys. B: At. Mol. Opt. Phys. (IF 1.655) Pub Date : 20220427
Mogens Dalgaard, Felix MotzoiQuantum optimal control theory is becoming increasingly crucial as quantum devices become more precise, but the need to quickly optimize these systems classically remains a significant bottleneck in their operation. Here we present a new theoretical quantum control framework for much faster optimization than the state of the art by replacing standard time propagation with a product of shorttime propagators

Role of longrange correlations in high harmonic generation in disordered systems J. Phys. B: At. Mol. Opt. Phys. (IF 1.655) Pub Date : 20220427
AiWu Zeng, XueBin BianThe mechanism of high harmonic generation (HHG) from condensed matter driven by ultrafast lasers is far from being understood due to the structural diversity and complexity. One of the longstanding open questions is the effect of random disorder in noncrystal HHG. In this work, we identify the critical role of correlations in disordered semiconductor systems and propose them as the criterion to classify

About the possibility for using graphene layers 12 C–13 C for quantum computation J. Phys. B: At. Mol. Opt. Phys. (IF 1.655) Pub Date : 20220427
Gustavo V López, Jorge O Vizcaíno GWe used a graphene 12 C matrix doped with 13 C atoms in a squared and centertriangular configuration, where only the interaction 13 C–13 C with their magnetic moments are considered. This is done in the presence of a constant magnetic field parallel to the layers and a transverse rfmagnetic field in order to simulate the NOT gate (single layer), controllednot quantum gate (two layers), and cont

Broadband strong photon correlations of frequencyresolved singleatom resonance fluorescence generated by two equalfrequency laser fields with different amplitudes J. Phys. B: At. Mol. Opt. Phys. (IF 1.655) Pub Date : 20220427
Sujing Liu, Zean Peng, Xuxing Geng, Teng Zhao, Shaoping Wu, Gaoxiang LiFrequencyresolved photon statistics of resonance fluorescence generated from a twolevel system driven by a strong laser field and a weak laser field with equal frequencies are studied. The frequency resolution of fluorescent radiation is described by quantum filtering dynamics, which is simulated theoretically by two singlemode quantum optical cavities with tunable frequencies to scan the incident

Theoretical calculation of characteristic radiation: multiconfiguration Dirac–Hartree–Fock calculations in scandium K α and K β J. Phys. B: At. Mol. Opt. Phys. (IF 1.655) Pub Date : 20220422
J W Dean, P Pushkarna, H A Melia, T V B Nguyen, C T ChantlerThe characteristic xray spectra of 3d transition metals are a constant source of advances in atomic physics, xray spectrometry, and quantum mechanics. Prior to this work, there was a discrepancy of 0.549 eV between theoretical and experimental results for the scandium Kα 1 peak energy, representing a 55σ discrepancy using the experimental uncertainty. This work improves this to a 0.330 eV discrepancy

Improved stabilization scheme for extreme ultraviolet quantum interference experiments J. Phys. B: At. Mol. Opt. Phys. (IF 1.655) Pub Date : 20220421
Daniel Uhl, Andreas Wituschek, Ulrich Bangert, Marcel Binz, Carlo Callegari, Michele Di Fraia, Oksana Plekan, Kevin Charles Prince, Giulio Cerullo, Luca Giannessi, Miltcho Danailov, Giuseppe Sansone, Tim Laarmann, Rupert Michiels, Marcel Mudrich, Paolo Piseri, Richard James Squibb, Raimund Feifel, Stefano Stranges, Frank Stienkemeier, Lukas BruderInterferometric pump–probe experiments in the extreme ultraviolet (XUV) domain are experimentally very challenging due to the high phase stability required between the XUV pulses. Recently, an efficient phase stabilization scheme was introduced for seeded XUV free electron lasers (FELs) combining shottoshot phase modulation with lockin detection Wituschek et al (2020 Nat. Commun. 11 883). This method

Subopticalcycle electron pulse trains from metal nanotips J. Phys. B: At. Mol. Opt. Phys. (IF 1.655) Pub Date : 20220420
Maor Eldar, Salma AboToame, Michael KrügerThe coherent modulation of swift electron beams with strong laser fields has enabled the generation of attosecond electron pulses, opening up new research avenues in ultrafast science. Here we study a comparatively simple alternative, the production of electron pulse trains directly at the source. In our theory work, we show that subopticalcycle electron bursts induced by tunneling photoemission

Enhanced ferromagnetic ordering of Mn trimer symmetrically and fully exposed on iridiumdoped graphene J. Phys. B: At. Mol. Opt. Phys. (IF 1.655) Pub Date : 20220414
Yan Han,Junfeng Gao,Yanhu Jiang,Xiaodan Wan,JianGuo Wan,Jijun ZhaoAbstract The structure and magnetism of the Mn trimer adsorbed on the iridium doped graphene are studied by using density functional theory calculations. Our calculation results show that the Mn trimer prefer to locate on the top of the Ir atom and form a fully exposed highsymmetry configuration with large binding energy and hardness of rotation. The ferromagnetic ordering of the Mn trimer fully exposed

Nonintrusive temperature measurement of a combustion field by femtosecond laserinduced third harmonic generation J. Phys. B: At. Mol. Opt. Phys. (IF 1.655) Pub Date : 20220413
Ziting Li, Jinming Chen, Zhaoxiang Liu, Jinping Yao, Jianping Yu, Yi Li, Fengyi Rong, Pengfei Wang, Hongqiang Xie, Ya ChengWe report a comparative experimental investigation of femtosecond laserinduced third harmonic generation (THG) in an ethanol flame and in air. It was found that the third harmonic (TH) signal produced in the presence of a combustion field can be greatly enhanced, in comparison to that generated in air, and that the enhancement factor depends strongly on the experimental parameters, such as the focal

The effect of the Doppler mismatch in microwave electrometry using Rydberg electromagnetically induced transparency and Autler–Townes splitting J. Phys. B: At. Mol. Opt. Phys. (IF 1.655) Pub Date : 20220412
Fei Zhou, FengDong Jia, Jiong Mei, XiuBin Liu, HuaiYu Zhang, YongHong Yu, WeiChen Liang, JianWei Qin, Jian Zhang, Feng Xie, ZhiPing ZhongWe have systematically investigated the influence of the gas temperature (T), the Rabi frequencies of the probe laser (Ωp), the coupling laser (Ωc) and the radiofrequency (RF) (ΩRF) on the Rydberg electromagnetically induced transparency (EIT) and Autler–Townes (AT) splitting (Δf) by defining a general Doppler mismatch factor D g = ΩRF/Δf in the Rydberg atombased microwave electrometry. The effect

Measurement and suppression of magnetic field noise of trapped ion qubit J. Phys. B: At. Mol. Opt. Phys. (IF 1.655) Pub Date : 20220407
Wenzhe Wei, Peng Hao, Zhiyu Ma, Huixing Zhang, Liren Pang, Fangfei Wu, Ke Deng, Jie Zhang, Zehuang LuMagnetic field noise is an important factor causing quantum decoherence in quantum systems. In order to suppress the decoherence effect, magnetic field noise needs to be properly measured and controlled. Magnetic field noise power spectrum measurement using a single trapped ion based quantum spectrum analyzer is a very effective way. In this paper, the magnetic field noise measurement based on dynamic

Eavesdropping attack on a continuousvariable sourceindependent quantum random number generator with fluctuating local oscillator J. Phys. B: At. Mol. Opt. Phys. (IF 1.655) Pub Date : 20220407
Han Zhou, Ziyong Zheng, Luyu Huang, Xiangyu Wang, Ziyang Chen, Song YuIn the practical continuousvariable sourceindependent quantum random number generator, it is usually necessary to introduce a local oscillator to amplify the received quantum signal due to its weak intensity. However, the intensity fluctuation of the local oscillator itself will lead to a deviation in evaluating the randomness without monitoring the local oscillator in real time and calibrating each

Exact analytical solution of the driven qutrit in an open quantum system: V and Λ configurations J. Phys. B: At. Mol. Opt. Phys. (IF 1.655) Pub Date : 20220406
Zachary C Coleman, Lincoln D CarrWe obtain the exact analytical solution for the continuously driven qutrit in the V and Λ configurations governed by the Lindblad master equation. We calculate the linear susceptibility in each system, determining regimes of transient gain without inversion, and identify exact parameter values for superluminal, vanishing, and negative group velocity for the probe field.

The basis set, scattering wavefunction and Schwinger variational principle: an application for low energy positronatom scattering J. Phys. B: At. Mol. Opt. Phys. (IF 1.655) Pub Date : 20220406
Eliton Popovicz Seidel, Felipe ArretcheThe quality of the positron wavefunction produced by applying the Schwinger variational principle (SVP) is scrutinized. An optical potential formalism is applied considering a semiempirical polarization potential. The positron wavefunction is expanded into a basis set formed by hydrogenlike atom eigenfunctions. Two different forms for the ansatz are tested out. The model is applied to positron scattering

An experimental and theoretical study of the Kr 3d correlation satellites J. Phys. B: At. Mol. Opt. Phys. (IF 1.655) Pub Date : 20220404
M D Kiselev, M Reinhardt, M Patanen, A Kivimäki, I Powis, O Zatsarinny, A N GrumGrzhimailo, D M P HollandThe Kr 3d correlation satellites have been studied experimentally by using plane polarized synchrotron radiation to record polarization dependent photoelectron spectra (PES), and theoretically by employing the Rmatrix method to calculate photoionization cross sections, PES and angular distributions. The experimental spectra have allowed the photoelectron anisotropy parameters characterizing the angular

Resonance signatures in DCS and spin polarization for positron scattering with C60 and rare gas endohedrals J. Phys. B: At. Mol. Opt. Phys. (IF 1.655) Pub Date : 20220401
Km Akanksha Dubey, Marcelo F CiappinaWe present a comparative study of differential cross sections (DCSs) and spin polarizations for positron scattering from C60 and A@C60, elucidating the role of encapsulation of rare gas atoms inside the giant C60 cage. A comparison is provided with the earlier work for elastic positronC60 scattering. We find a very good agreement even when a model potential is used for the positronC60 interaction

Infinite bound states and hydrogen atomlike energy spectrum induced by a flat band J. Phys. B: At. Mol. Opt. Phys. (IF 1.655) Pub Date : 20220401
YiCai Zhang, GuoBao ZhuIn this work, we investigate the boundstate problem in a onedimensional spin1 Dirac Hamiltonian with a flat band. It is found that the flat band has significant effects on the bound states. For example, for Dirac delta potential gδ(x), there exists one bound state for both the positive and negative potential strength g. Furthermore, when the potential is weak, the boundstate energy is proportional

Data analysis procedures for timeresolved xray photoelectron spectroscopy at a SASE freeelectronlaser J. Phys. B: At. Mol. Opt. Phys. (IF 1.655) Pub Date : 20220321
Dennis Mayer, Fabiano Lever, Markus GührThe random nature of selfamplified spontaneous emission (SASE) is a wellknown challenge for xray core level spectroscopy at SASE freeelectron lasers (FELs). Especially in timeresolved experiments that require a combination of good temporal and spectral resolution the jitter and drifts in the spectral characteristics, relative arrival time as well as power fluctuations can smear out spectraltemporal

Suppression of interactioninduced loss rate coefficient near broad swave and pwave Feshbach resonances by magnetic field J. Phys. B: At. Mol. Opt. Phys. (IF 1.655) Pub Date : 20220318
BingKuan Lyu, ZhiXin Sun, GaoRen Wang, ShuLin CongUltracold atoms prepared in excited internal states can escape from the trap through inelastic collisions. A magnetic field can be used to suppress the swave loss rate coefficient near an swave Feshbach resonance. However, at the temperature of μK the pwave loss rate coefficient becomes increasingly important as the temperature increases. The unsuppressed pwave loss rate coefficient can far exceed

Shannon entropy of resonant scattered state in the e–C60 elastic collision J. Phys. B: At. Mol. Opt. Phys. (IF 1.655) Pub Date : 20220317
Shruti Sarswat, Aiswarya R, Jobin JoseResonance is a remarkable feature in elastic scattering and the resonant states of e–C60 scattering are benchmarked using Shannon entropy in the present work. The resonant wavefunction, total crosssection, partial crosssections, and scattering phase shifts are calculated for the e–C60 scattering to review the localization properties owing to resonance. Three different model interaction potentials

How to administer an antidote to Schrödinger’s cat J. Phys. B: At. Mol. Opt. Phys. (IF 1.655) Pub Date : 20220317
JuanRafael Álvarez, Mark IJspeert, Oliver Barter, Ben Yuen, Thomas D Barrett, Dustin Stuart, Jerome Dilley, Annemarie Holleczek, Axel KuhnIn his 1935 Gedankenexperiment, Erwin Schrödinger imagined a box with a cat and a poisonous substance which has a 50% probability of being released, based on the decay of a radioactive atom. As such, the life of the cat and the state of the poison become entangled, and the fate of the cat is determined upon opening the box. We present an experimental technique that keeps the cat alive on any account

Analytical theory of enhanced Bose–Einstein condensation in thin films J. Phys. B: At. Mol. Opt. Phys. (IF 1.655) Pub Date : 20220316
Riccardo Travaglino, Alessio ZacconeWe present an analytically solvable theory of Bose–Einstein condensation (BEC) in thin film geometries. Analytical closedform expressions for the critical temperature are obtained in both the lowtomoderate confinement regime (where the film thickness L is in the order of microns) as well as in the strong confinement regime where the thickness is in the order of few nanometers or lower. The possibility

Analysis of correlations in strong field ionization J. Phys. B: At. Mol. Opt. Phys. (IF 1.655) Pub Date : 20220316
I A Ivanov, Kyung Taec KimWe propose to use correlation function analysis as a tool for the study of strong field ionization. We show, in particular, that study of the correlations of electron’s coordinate and velocity reveals patterns which can be naturally interpreted as manifestations of the electron’s exit point (the spatial point where the electron exits the tunneling barrier). This analysis provides an unambiguous definition

A model study on superfluidity of a unitary Fermi gas of atoms interacting with a finiteranged potential J. Phys. B: At. Mol. Opt. Phys. (IF 1.655) Pub Date : 20220314
Subhanka Mal, Bimalendu DebWe calculate Bardeen–Cooper–Schrieffer (BCS) state of a unitary Fermi gas of atoms interacting with the finiteranged JostKohn potential which has been recently shown to account for the resonant interactions (2019 J. Phys. B: At. Mol. Opt. Phys. 52 165004). Using exact scattering solution of the potential, we derive twobody Tmatrix element which is employed to construct the BCS Hamiltonian in momentum

Theoretical study of highorder harmonic generation in solutions J. Phys. B: At. Mol. Opt. Phys. (IF 1.655) Pub Date : 20220311
ChangLong Xia, JiaQi Liu, LingJie Lü, AiWu Zeng, ZhengLiang Li, XueBin BianHighorder harmonic generation (HHG) in disordered systems is investigated by numerically solving the timedependent Schrödinger equation. We reveal the vital role of Anderson localization in this situation. It allows us to develop a new and efficient sampling method for the large disordered system, which could significantly reduce the computation cost. It can be applied to both pure liquids and solutions

Formation of electronic coherences in conical intersectionmediated dynamics J. Phys. B: At. Mol. Opt. Phys. (IF 1.655) Pub Date : 20220310
Simon P Neville, Albert Stolow, Michael S SchuurmanWe consider the formation of vibrationallyinduced transient electronic coherences driven by conical intersection (CI)mediated population transfer between two electronic states. By invoking fundamental symmetry arguments, we identify several important factors which modulate the magnitude of these electronic coherences. We consider the subcases where the two electronic states have either the same

Simulation of antihydrogen deexcitation in neutral atom traps for improved trapping and cooling J. Phys. B: At. Mol. Opt. Phys. (IF 1.655) Pub Date : 20220307
C Malbrunot, T Wolz, L Nowak, D ComparatWe present results of simulations highlighting the performance of a cooling mechanism in a magnetic trap tailored for excited Rydberg atoms (or molecules) with high magnetic moment. Unlike previous work, the cooling is achieved through fast stimulated decay of intermanifold transitions which optimizes the scheme. This mechanism is relevant to experiments with trapped antihydrogen atoms for which the

Introduction to spectral line shape theory J. Phys. B: At. Mol. Opt. Phys. (IF 1.655) Pub Date : 20220302
T A Gomez, T Nagayama, P B Cho, D P Kilcrease, C J Fontes, M C ZammitSpectral lineshape models are an important part of understanding highenergydensity (HED) plasmas. Models are needed for calculating opacity of materials and can serve as diagnostics for astrophysical and laboratory plasmas. However, much of the literature on line shapes is directed toward specialists. This perspective makes it difficult for nonspecialists to enter the field. We have two broad goals

Lowenergy elastic electron scattering cross sections of acrylic acid and its methylated derivatives J. Phys. B: At. Mol. Opt. Phys. (IF 1.655) Pub Date : 20220301
Francisco Fernandes Frighetto, M H F BettegaIn the present work we report elastic cross sections for electron scattering from acrylic acid (CH2 = CHCOOH) and its methylated derivatives, crotonic acid (CH3CH = CHCOOH), methacrylic acid (H2C = C(CH3)COOH) and methyl acrylate (CH2 = CHCOOCH3). The calculations were performed with the Schwinger multichannel method for impact energies up to 15 eV. Two π* shape resonances were found in the component

Wheeler’s delayedchoice experiment based on Rydberg atoms J. Phys. B: At. Mol. Opt. Phys. (IF 1.655) Pub Date : 20220301
GenSheng Ye, Biao Xu, FengYuan Kuang, HaoXiang Liu, Shuai Shi, Yiqiu Ma, Lin LiThe delayed choice gedankenexperiment initially proposed by J A Wheeler reveals the nontrivial features of wave–particle duality in quantum world, that is, the choice of whether to observe the particle/wave character of a quantum system at a delayed time can affect its evolution history. In this work, the Wheeler’s delayedchoice experiment is conducted and tested in a new regime based on a Rydbergground

Electron vacancylevel dependent hybrid photoionization of the F−@ C60+ molecule: a novel effect J. Phys. B: At. Mol. Opt. Phys. (IF 1.655) Pub Date : 20220228
Esam Ali, Taylor O’Brien, Andrew Dennis, Mohamed ElAmine Madjet, Steven T Manson, Himadri S ChakrabortyOur previous studies (Shields et al 2020 J. Phys. B: At. Mol. Opt. Phys. 53 125101; Shields et al 2020 Euro. Phys. J. D 74 191) have predicted that the atomfullerene hybrid photoionization properties for X = Cl, Br and I endohedrally confined in C60 are different before and after an electron transfers from C60 to the halogen. It was further found as a rule that the ionization dynamics is insensitive

Polarizationpathfrequency entanglement using interferometry and frequency shifters J. Phys. B: At. Mol. Opt. Phys. (IF 1.655) Pub Date : 20220228
Mrittunjoy Guha Majumdar, C M ChandrashekarHigher dimensional Hilbert space along with ability to control multiple degrees of freedom of photon and entangle them has enabled new quantum protocols for various quantum information processing applications. Here, we propose a scheme to generate and control polarizationpathfrequency entanglement using the operative elements required to implement a polarizationcontrolled quantum walk in the path

Carbon Kedge xray emission spectroscopy of gas phase ethylenic molecules J. Phys. B: At. Mol. Opt. Phys. (IF 1.655) Pub Date : 20220228
R A Ingle, A Banerjee, C Bacellar, T R Barillot, L Longetti, M Coreno, M de Simone, F Zuccaro, L Poletto, P Miotti, A Röder, A Stolow, M S Schuurman, M Odelius, M CherguiWe report on the C Kedge xray absorption spectra and the resonant (RXES) and nonresonant (NXES) xray emission spectra of ethylene, allene and butadiene in the gas phase. The RXES and NXES show clear differences for the different molecules. Overall both types of spectra are more structured for ethylene and allene, than for butadiene. Using density functional theory–restricted open shell configuration

Optomechanicallygenerated photon–phonon single pairs with both discrete and continuousvariable entanglements J. Phys. B: At. Mol. Opt. Phys. (IF 1.655) Pub Date : 20220225
Cun Yu, Zhenshan Yang, Xiangguo Meng, Zhentao Zhang, Xia Zhang, Chenglin BaiBy exploiting two mechanical modes in an optomechanical resonator, photon–phonon single pairs with both discrete and continuousvariable entanglements can be generated in a waveguide that is coupled to the resonator. The discrete and continuousvariable entanglements in the photon–phonon pair can be independently controlled via adjusting the central frequency and spectral width of the input optical

A polarizationconsistent Rmatrix model: application to the photoionization of molecules J. Phys. B: At. Mol. Opt. Phys. (IF 1.655) Pub Date : 20220223
T Meltzer, Z MašínWe introduce a new variational Rmatrix model called polarizationconsistent coupled Hartree–Fock (PCCHF). The PCCHF model describes polarization and multichannel effects in polyatomic molecules, whilst using a simple Hartree–Focklike description of the ionic states. Furthermore, the model is constructed in a selfconsistent manner meaning that all of the target states implied by the polarization

Engineering longrange interactions between ultracold atoms with light J. Phys. B: At. Mol. Opt. Phys. (IF 1.655) Pub Date : 20220222
T Xie, A Orbán, X Xing, E LucKoenig, R Vexiau, O Dulieu, N BouloufaMaafaUltracold temperatures in dilute quantum gases opened the way to an exquisite control of matter at the quantum level. Here we focus on the control of ultracold atomic collisions using a laser to engineer their interactions at large interatomic distances. We show that the entrance channel of two colliding ultracold atoms can be coupled to a repulsive collisional channel by the laser light so that the

Experimental dielectronic recombination rate coefficients for lithiumlike 40Ca17+ J. Phys. B: At. Mol. Opt. Phys. (IF 1.655) Pub Date : 20220218
Nadir Khan, ZhongKui Huang, WeiQiang Wen, ShuXing Wang, ChongYang Chen, ChunYu Zhang, HanBing Wang, Xin Liu, WanLu Ma, DongYang Chen, Ke Yao, DongMei Zhao, LiJun Mao, XiaoMing Ma, Jie Li, MeiTang Tang, DaYu Yin, YouJin Yuan, JianCheng Yang, LinFan Zhu, XinWen MaThe rate coefficients for dielectronic recombination (DR) of lithiumlike 40Ca17+ ions with ∆n = 0 core excitations are derived from electron–ion recombination spectra measured with mergedbeams method at the heavyion storage ring CSRm. The experimental DR spectrum, in the electron–ion collision energy range of 0 to 42 eV in the centerofmass frame, comprises of all DR resonance peaks belong to the

Reinvestigation and line identifications for W11+ in the visible range J. Phys. B: At. Mol. Opt. Phys. (IF 1.655) Pub Date : 20220216
N Fu,Q Lu,C L Yan,G Q Xu,K Wang,C Y Chen,Y Zou,J XiaoAbstract We present a new investigation of unidentified emission lines in 350–660 nm from W11+ at a compact electronbeam ion trap in Shanghai. To help the line identification, transition energies of the lowest 48 levels are calculated by the largescale relativistic configuration interaction and multiconfiguration Dirac–Hartree–Fock calculation. The results from the two calculations are in good agreement

An efficient method for producing 9Be+ ions using a 2 + 1 resonanceenhanced multiphoton ionization process J. Phys. B: At. Mol. Opt. Phys. (IF 1.655) Pub Date : 20220216
Min Li, Yong Zhang, QianYu Zhang, WenLi Bai, ShengGuo He, WenCui Peng, Xin TongWe report a method of creating pure 9Be+ ions by a 2 + 1 resonanceenhanced multiphoton ionization for the ionization potential of 75 192.64(6) cm−1 (133 nm). The efficient generation of 9Be+ ions has been realized in a segmented linear ion trap. The average loading rates with a 10 ns, 1 mJ laser at 310 nm and 306 nm are 3.8 and 1.3 ions per pulse, respectively. This method has the advantage of reducing

Signature of supersolidity in a driven cubic–quartic nonlinear Schrödinger equation J. Phys. B: At. Mol. Opt. Phys. (IF 1.655) Pub Date : 20220211
Argha Debnath, Jammu Tarun, Ayan KhanWe present analytical solution, which is periodic in nature, for a driven cubic–quartic nonlinear Schrödinger equation (DCQNLSE) is placed in a bichromatic optical lattice. The solution indicates the creation of density wave. Since, beyond meanfield contribution in quasi one dimensional and one dimensional geometry differs on the even exponents of the nonlinearity thus we extend our analysis toward

Unraveling the origin of higher success probabilities in quantum annealing versus semiclassical annealing J. Phys. B: At. Mol. Opt. Phys. (IF 1.655) Pub Date : 20220211
Elias Starchl, Helmut RitschQuantum annealing aims at finding optimal solutions to complex optimization problems using a suitable quantum many body Hamiltonian encoding the solution in its ground state. To find the solution one typically evolves the ground state of a soluble, simple initial Hamiltonian adiabatically to the ground state of the designated final Hamiltonian. Here we explore whether and when a full quantum representation

Effects of singlephoton double photoionization and direct double Auger decay on Kshell ionization kinetics of Ar atoms interacting with XFEL pulses J. Phys. B: At. Mol. Opt. Phys. (IF 1.655) Pub Date : 20220211
Yongjun Li, Cheng Gao, Jiaolong Zeng, Jianmin YuanIn studies investigating the interaction of matter with ultraintense, ultrashort xray free electron laser (XFEL) pulses, the evolution kinetics are generally described by directly solving a timedependent rate equation that considers singlephoton and singleelectron processes. In the present study, we show the effects of singlephoton double photoionization and direct double Auger decay in the Kshell

Multiparametercontrolled laser ionization within a plasma wave for wakefield acceleration J. Phys. B: At. Mol. Opt. Phys. (IF 1.655) Pub Date : 20220211
M Stumpf, M Melchger, S Montag, G PretzlerWe present an optical setup for welldefined ionization inside a plasma such that precisely controlled spots of high electron density can be generated. We propose to use the setup for Trojan Horse Injection (or Plasma Photocathode Emission) where a collinear laser beam is needed to release electrons inside a plasma wakefield. The reflectionbased setup allows a suitable manipulation of the laser near

UVinduced dissociation of CH2BrI probed by intense femtosecond XUV pulses J. Phys. B: At. Mol. Opt. Phys. (IF 1.655) Pub Date : 20220211
Hansjochen Köckert, Jason W L Lee, Felix Allum, Kasra Amini, Sadia Bari, Cédric Bomme, Felix Brauße, Mark Brouard, Michael Burt, Barbara Cunha de Miranda, Stefan Düsterer, Per EngJohnsson, Benjamin Erk, Marie Géléoc, Romain Geneaux, Alexander S Gentleman, Renaud Guillemin, Gildas Goldsztejn, David M P Holland, Iyas Ismail, Loïc Journel, Thomas Kierspel, Jochen Küpper, Jan Lahl, Stuart R MackenzieThe ultraviolet (UV)induced dissociation and photofragmentation of gasphase CH2BrI molecules induced by intense femtosecond extreme ultraviolet (XUV) pulses at three different photon energies are studied by multimass ion imaging. Using a UVpump–XUVprobe scheme, charge transfer between highly charged iodine ions and neutral CH2Br radicals produced by C–I bond cleavage is investigated. In earlier

The angular pattern in the hyperfine structure of Xe I and Kr I atoms J. Phys. B: At. Mol. Opt. Phys. (IF 1.655) Pub Date : 20220211
C Blondel, C DragRecent reviews of the hyperfine structure of xenon and krypton have highlighted the variety of the values taken by the hyperfine coefficients A and B of these atoms. These variations, as functions of the atomic angular momenta, were however not explained quantitatively. This article shows the simple picture and angular momentum algebra that make it possible to account for the observed trend. The only

Theoretical study of generalized oscillator strengths for the lowlying electronic excitations of CH3Cl and CF3Cl J. Phys. B: At. Mol. Opt. Phys. (IF 1.655) Pub Date : 20220211
Noboru Watanabe, Masahiko TakahashiWe report a theoretical study of electronic excitation in CH3Cl and CF3Cl by electron impact. Momentumtransferdependent generalized oscillator strengths (GOSs) are calculated for transitions to lowlying excited singletstates at the equationofmotion coupledcluster singles and doubles level. The influence of molecular vibration is taken into account in the calculation. The theoretical results