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Transfer phase of microwave to beat amplitude in a Rydberg atombased mixer by Zeeman modulation J. Phys. B: At. Mol. Opt. Phys. (IF 1.917) Pub Date : 20210907
FengDong Jia, HuaiYu Zhang, XiuBin Liu, Jiong Mei, YongHong Yu, ZhaoQing Lin, HaiYue Dong, Ya Liu, Jian Zhang, Feng Xie, ZhiPing ZhongMicrowave phase detection is an essential technique in antenna metrology, radar, and communications. The Rydberg atombased mixer has been successful in the measurement of the phase of a signal microwave field by creating a beat in the presence of a local microwave field, in which the phase information is transferred into the phase of the beat. In this study, we extend the function of the Rydberg atombased

Testing the coherence of supercontinuum generated by optical vortex beam in water J. Phys. B: At. Mol. Opt. Phys. (IF 1.917) Pub Date : 20210903
He Zhang, Yun Zhang, Shuang Lin, Mingying Chang, Miao Yu, Yaqiu Wang, Anmin Chen, Yuanfei Jiang, Suyu Li, Mingxing JinWe experimentally study the femtosecond supercontinuum (SC) generation using an optical vortex (OV) beam in water. It is demonstrated that the topological charge of the OV beam has little influence on spectral broadening induced by filament, while it has strong influence on spectral intensity. Despite the SC induced by filamentation of optical vortices in air possesses orbital angular momentums (OAMs)

Kinklike solitons in quantum droplet J. Phys. B: At. Mol. Opt. Phys. (IF 1.917) Pub Date : 20210903
Aradhya Shukla, Neeraj, Prasanta K PanigrahiSolitonic excitations of the onedimensional quantum droplets are obtained, which smoothly connect vacuum with the flattop droplet, akin to compactons in classical liquids. These solitons are of the kink type, necessarily residing on a constant pedestal, determined by the meanfield (MF) repulsion and beyond mean field quantum correction and having exactly onethird of the uniform condensate amplitude

Attoclock with bicircular laser fields as a probe of velocitydependent tunnelexit positions J. Phys. B: At. Mol. Opt. Phys. (IF 1.917) Pub Date : 20210903
Simon Brennecke, Sebastian Eckart, Manfred LeinStrongfield ionization of atoms can be investigated on the attosecond time scale by using the attoclock method, i.e. by observing the peak of the photoelectron momentum distribution (PMD) after applying a laser pulse with a twodimensional polarization form. Examples for such laser fields are closetocircular or bicircular fields. Here, we report numerical solutions of the timedependent Schrdinger

Splitting of a photon by an atomic ion J. Phys. B: At. Mol. Opt. Phys. (IF 1.917) Pub Date : 20210831
A N Hopersky, A M Nadolinsky, S A Novikov, R V KoneevThe effect of inelastic splitting of a hard xray photon into two photons by an atomic ion, as well as its angular anisotropy, are theoretically investigated for the proposed experimental schemes. These results may be important, in particular, in the diagnostics of magnetic fusion plasmas and in interpreting the background (continuum) structures of emission spectra of hot astrophysical objects.

Fast, simple, alloptical production of sodium spinor condensates J. Phys. B: At. Mol. Opt. Phys. (IF 1.917) Pub Date : 20210831
Wenliang Liu, Ningxuan Zheng, Xiaofeng Wang, Jing Xu, Yuqing Li, Vladimir B Sovkov, Peng Li, Yongming Fu, Jizhou Wu, Jie Ma, Liantuan Xiao, Suotang JiaWe present an experiment for quickly producing Bose–Einstein condensates (BECs) of 23Na atoms in a simple crossed dipole trap. The atoms were collected in a magnetooptical trap from a zerocrossing Zeeman slower. The atoms are then transferred to a tightly focused crossed optical dipole trap, and a pure F = 1 BEC of ∼1.1 105 sodium atoms was created by a fast forced evaporation. Our system reliably

Timefrequency mapping of twocolour photoemission driven by harmonic radiation J. Phys. B: At. Mol. Opt. Phys. (IF 1.917) Pub Date : 20210831
Bruno Moio, Gian Luca Dolso, Giacomo Inzani, Nicola Di Palo, Roco BorregoVarillas, Mauro Nisoli, Matteo LucchiniThe use of fewfemtosecond, extreme ultraviolet (XUV) pulses, produced by highorder harmonic generation, in combination with fewfemtosecond infrared (IR) pulses in pump–probe experiments has great potential to disclose ultrafast dynamics in molecules, nanostructures and solids. A crucial prerequisite is a reliable characterization of the temporal properties of the XUV and IR pulses. Several techniques

Frustrated tunneling dynamics in ultrashort laser pulses J. Phys. B: At. Mol. Opt. Phys. (IF 1.917) Pub Date : 20210831
Edvin Olofsson, Stefanos Carlstrm, Jan Marcus DahlstrmWe study a model for frustrated tunneling ionization using ultrashort laser pulses. The model is based on the strong field approximation and it employs the saddle point approximation to predict quasiclassical trajectories that are captured on Rydberg states. We present a classification of the saddlepoint solutions and explore their behavior as functions of angular momentum of the final state, as well

Control and enhancement of multiband high harmonic generation by synthesized laser fields J. Phys. B: At. Mol. Opt. Phys. (IF 1.917) Pub Date : 20210831
Barry D Bruner, Ayelet J NarovlanskyUzan, Talya ArusiParpar, Gal Orenstein, Assaf Shonfeld, Nirit DudovichHigh harmonic generation (HHG) spectroscopy has emerged as an invaluable tool for studying electronic dynamics and structure in crystals. The primary challenges are imposed by the multiple degrees of freedom of the underlying dynamics as well as the low efficiency of the HHG process. Here we show that when the HHG process is driven by a synthesized bichromatic field, its efficiency can be significantly

Highfidelity modelling of CsAr and CsXe exciplex pumped alkali lasers with temperaturedependent energy pooling and ionization reactions J. Phys. B: At. Mol. Opt. Phys. (IF 1.917) Pub Date : 20210827
David L Carroll, Peter M MaggsParametric measurements of pulsed output energy from the fourlevel exciplex pumped alkali laser (XPAL) for CsAr, CsKr, and CsXe as a function of input pump energy and temperature show a strong dependence on temperature. All three Csrare gas mixtures show a D2 line laser performance increase with temperature towards a peak efficiency, followed by a decrease as temperature is increased beyond a

Characterising a tunable, pulsed atomic beam using matterwave interferometry J. Phys. B: At. Mol. Opt. Phys. (IF 1.917) Pub Date : 20210827
J Morley, R Flack, B J Hiley, P F BarkerWe describe the creation and characterisation of a velocity tunable, spinpolarized beam of slow metastable argon atoms. We show that the beam velocity can be determined with a precision below 1% using matterwave interferometry. The profile of the interference pattern was also used to determine the velocity spread of the beam, as well as the Van der Waals (VdW) coefficient for the interaction between

Single and double scattering mechanisms in ionization of helium by electron vortex projectiles J. Phys. B: At. Mol. Opt. Phys. (IF 1.917) Pub Date : 20210827
A L HarrisTriple differential cross sections (TDCSs) for electron vortex projectile ionization of helium into the azimuthal plane are calculated using the distorted wave Born approximation. In this collision geometry, the TDCSs at low and intermediate energies exhibit unique qualitative features that can be used to identify single and double scattering mechanisms. In general, our results predict that the ionization

Electron emission from fluorene (C13H10) upon 3.5 MeV/u Si8+ ion impact: double differential distributions J. Phys. B: At. Mol. Opt. Phys. (IF 1.917) Pub Date : 20210827
Chandan Bagdia, Anuvab Mandal, Madhusree Roy Chowdhury, Shamik Bhattacharjee, M Nrisimha Murty, Deepankar Misra, Christophe Champion, Lszl Gulys, Philippe F Weck, Lokesh C TribediWe have studied the electron emission from one of the polycyclic aromatic hydrocarbon (PAH) molecules namely, fluorene (C13H10), upon 3.5 MeV/u Si8+ ion impact. The experimentally measured absolute double differential cross sections (DDCS) are compared with the continuum distorted waveeikonal initial state (CDWEIS) model and the first Born approximation including correct boundary conditions (CB1)

Electron detachment cross section of H− induced by collisions with O2 J. Phys. B: At. Mol. Opt. Phys. (IF 1.917) Pub Date : 20210827
S Vergara, A A Martnez, F R Pealver, G HinojosaWe present measured electron detachment cross sections from hydrogen anion induced by collisions with O2 in the energy range of 1 to 9 keV with two methods, the beam attenuation and the signal growth rate. Processes involved in the interaction are discussed in terms of the cross section differences as a function of the time of flight of the H− through an analysing electric field. As a consequence,

Thermodynamic relations and rovibrational energy levels of the improved Pschl–Teller oscillator for diatomic molecules J. Phys. B: At. Mol. Opt. Phys. (IF 1.917) Pub Date : 20210827
Edwin Samson Eyube, B M Bitrus, Y Y JabilIn this paper, the formalism of improved quantization rule is used to obtain analytical expression for bound state rovibrational energies of the improved Pschl–Teller oscillator (IPTO). In modeling the centrifugal term of the effective potential, a Pekerislike approximation scheme is used. Expression for analytical normalized eigenfunctions is obtained by ansatz solution technique. The equation obtained

Structural and magnetic properties of polyicosahedral Ni–Pt–Cu ternary nanoalloys J. Phys. B: At. Mol. Opt. Phys. (IF 1.917) Pub Date : 20210827
Songl Taran, Hseyin Yıldırım, Haydar ArslanIn this study, a series of simulations were carried out to study the effects of size, composition and geometric structure on the structural and magnetic properties of ternary Ni–Pt–Cu nanoalloys. Different sizes and compositions were considered to compare the structural stability and magnetic behavior of Ni2Pt n Cu17n (n = 0–17), Ni3Pt n Cu20n (n = 0–20) and Ni4Pt n Cu22n (n = 0–22) nanoalloy systems

Photoionization of a quantum grating formed by a single atom J. Phys. B: At. Mol. Opt. Phys. (IF 1.917) Pub Date : 20210825
S F Zhang, B Najjari, X MaWhen an atom passes through a macroscopic diffraction grating its wave function acquires a regular space structure and its collision by another particle can be thought of as scattering, of the latter, on a grating composed of a single atom (hereafter termed as ‘quantumgrating’). Photoionization of such a ‘quantum grating’ unveils interference features and in particular a striking difference in the

Distribution of the total angular momentum in relativistic configurations J. Phys. B: At. Mol. Opt. Phys. (IF 1.917) Pub Date : 20210823
Michel Poirier, JeanChristophe PainThis paper is devoted to the analysis of the distribution of the total angular momentum in a relativistic configuration. Using cumulants and generating function formalism this analysis can be reduced to the study of individual subshells with N equivalent electrons of momentum j. An expression as a nthderivative is provided for the generating function of the J distribution and efficient recurrence

Theory of light narrowing of magnetic resonances of alkalimetal atoms in the geophysical field range J. Phys. B: At. Mol. Opt. Phys. (IF 1.917) Pub Date : 20210823
PanLi Qi, XuXIng Geng, GuoHuo Liu, GuoQing Yang, GuangMing Huang, GaoXiang LiWe present a theoretical study of the opticalradiofrequency (rf) double resonance on hyperfine ground states of alkalimetal atoms in the geophysical magneticfield range, in which resonance circularly polarized laser light is used in the optical pumping and detection processes. The analytical expressions of the rf resonance signals corresponding to two ground states are obtained based on atomic

Interference effects on intense XUV pulse induced resonant transitions between core ionized states of helium J. Phys. B: At. Mol. Opt. Phys. (IF 1.917) Pub Date : 20210819
Souvik ChatterjeeIn the context of coreresonant ionization of helium atom the inclusion of the He–He+(2p) ionization channel sets off a quantum mechanical interference between two competing pathways, He–He+(1s)–He+(2p) and He–He+(2p) (He–He+(1s) and He–He+(2p)–He+(1s)), thereby significantly modifying the line shape of the photoelectron spectrum. The signature of this interference arises as an asymmetry in the line

Effect of ionization asymmetry on high harmonic generation from oriented CO in orthogonal twocolor fields J. Phys. B: At. Mol. Opt. Phys. (IF 1.917) Pub Date : 20210819
Yan Yang, Lu Liu, Jing Zhao, Yanyun Tu, Jinlei Liu, Zengxiu ZhaoWe investigate the high harmonic generation from oriented CO molecules in orthogonal twocolor (OTC) fields by solving the threedimensional timedependent Hartree–Fock equation. The infrared fundamental laser pulse with frequency ω polarized along the molecular axis drives the harmonic generation process, while a weak second harmonic field with frequency ω 1 = 2ω perturbs the electron dynamics along

Carrierenvelope phase dependence of highorder abovethreshold ionization by fewcycle laser pulses J. Phys. B: At. Mol. Opt. Phys. (IF 1.917) Pub Date : 20210819
Yu Zhou, Li Guo, Wei Quan, MingZheng Wei, Meng Zhao, SongPo Xu, ZhiLei Xiao, RenPing Sun, YanLan Wang, XuanYang Lai, Jing Chen, XiaoJun LiuWith a stereo abovethreshold ionization (ATI) apparatus, we systematically investigate the carrierenvelope phase (CEP) dependence of the photoelectron kinetic energy spectra from highorder ATI of Xe atom subject to a strong fewcycle laser field. Our measurements reveal a prominent step structure and a maximum in the photoelectron kinetic energy dependence of the yield asymmetry. The observed structures

Magnetic superatoms in cage doped 13atom trimetallic Mg n Li12− n Sc (n = 1–8) clusters and their assembled discrete supermolecules: a theoretical prediction J. Phys. B: At. Mol. Opt. Phys. (IF 1.917) Pub Date : 20210818
Lijuan Yan, Jun Liu, Wenqing Shi, Jianmei ShaoDesigning the novel cluster units is a major concern in the cluster assembled materials. With the aid of particle swarm optimization algorithm and density functional theory calculations, we have identified the geometric and electronic structures of 13atom Mg n Li12−n Sc (n = 1–8) nanoclusters. The icosahedral structures are discovered as their respective global minima except Mg8Li4Sc, of which the

Coherent control of ultrafast bond making and subsequent molecular dynamics: demonstration of finalstate branching ratio control J. Phys. B: At. Mol. Opt. Phys. (IF 1.917) Pub Date : 20210818
Liat Levin, Daniel M Reich, Moran Geva, Ronnie Kosloff, Christiane P Koch, Zohar AmitayQuantum coherent control of ultrafast bond making and the subsequent molecular dynamics is crucial for the realization of a new photochemistry, where a shaped laser field is actively driving the chemical system in a coherent way from the thermal initial state of the reactants to the final state of the desired products. We demonstrate here coherent control over the relative yields of Mg2 molecules that

Stationary states of Bose–Einstein condensed atoms rotating in an asymmetric ring potential J. Phys. B: At. Mol. Opt. Phys. (IF 1.917) Pub Date : 20210817
M gren, Giannis Drougakis, Giorgos Vasilakis, Wolf von Klitzing, G M KavoulakisWe consider a Bose–Einstein condensate, which is confined in a very tight toroidal/annular trap, in the presence of a potential, which breaks the axial symmetry of the Hamiltonian. We investigate the stationary states of the condensate, when its density distribution corotates with the symmetrybreaking potential. As the strength of the potential increases, we have a gradual transition from vortex

Strongfield spectra and optical nearfield enhancement at aluminium needle tips J. Phys. B: At. Mol. Opt. Phys. (IF 1.917) Pub Date : 20210817
Timo Paschen, Constantin Nauk, Philip Dienstbier, Peter HommelhoffWe study the rescattering of photoemitted electrons at aluminium needle tips. For various laser intensities we measure electron energy spectra to identify telltale features of strongfield rescattering, in particular a plateau with nearconstant count rate and a highenergy cutoff. This rescattering process is used to investigate the geometrydependent enhanced optical nearfield at the apex of the

Towards molecular frame photoelectron angular distributions in polyatomic molecules from lab frame coherent rotational wavepacket evolution J. Phys. B: At. Mol. Opt. Phys. (IF 1.917) Pub Date : 20210816
Margaret Gregory, Paul Hockett, Albert Stolow, Varun MakhijaA theory and method for a matrixbased reconstruction of molecular frame (MF) photoelectron angular distributions (MFPADs) from laboratory frame (LF) measurements (LFPADs) is developed and basic applications are explored. As with prior studies of MF reconstruction, the experimental side of this protocol is based upon timeresolved LF measurements in which a rotational wavepacket is prepared and probed

Electron impact excitation of glutamine molecules irradiated with an M30 microtron with an energy of 11.5 MeV J. Phys. B: At. Mol. Opt. Phys. (IF 1.917) Pub Date : 20210816
O B Shpenik, V T Maslyuk, A N Zavilopulo, N M Erdevdi, A I Bulhakova, I G MegelaThe process of excitations of the glutamine molecules in the gas phase during collisions with lowenergy electrons (0–70eV) for samples before and after irradiation (11.5MeV) at the M30 microtron with doses of 10 kGy have been investigated by the optical spectroscopy method. Optical spectra were studied in the wavelength range 200–520nm; the effects caused by both external radiation and the scanning

Twodimensional threebody quadrupole–quadrupole interactions J. Phys. B: At. Mol. Opt. Phys. (IF 1.917) Pub Date : 20210816
Jianing HanThe interactions between dipoles are called dipole–dipole interactions. One type of dipole–dipole interaction is van der Waals interaction. Similar to van der Waals interactions, the interactions between quadrupoles are called quadrupole–quadrupole interactions. Atoms can be treated not only as dipoles but also as quadrupoles. In this article, we study the quadrupole interactions between highly excited

Ab initio calculations of the hyperfine structure of Ra+ and evaluations of the electric quadrupole moment Q of the 209,211,221,223Ra nuclei J. Phys. B: At. Mol. Opt. Phys. (IF 1.917) Pub Date : 20210816
FeiChen Li, YongBo Tang, HaoXue Qiao, TingYun ShiThe relativistic coupledcluster method has been employed to calculate the energies, magnetic dipole, electric quadrupole and magnetic octupole hyperfinestructure constants of the lowlying states of Ra+. The validity of our calculations is substantiated by comparing the calculated binding energies and magnetic dipole hyperfinestructure constants with the corresponding available experimental results

Different approximations in the polarization control of twocolor water molecule ionization J. Phys. B: At. Mol. Opt. Phys. (IF 1.917) Pub Date : 20210816
Lara Martini, Diego I R Boll, Alicia Palacios, Omar A FojnWe investigate different approximations in a polarization control scheme in twocolor twophoton ionization by means of secondorder timedependent perturbation theory. Experiments revealed lightpolarization dependencies in the abovethreshold ionization of water molecules assisted by an IR field. These experiments were performed at photoelectron energies at which the softphoton approximation exhibits

A versatile twocolour pulse generation setup with active feedback phaselocking J. Phys. B: At. Mol. Opt. Phys. (IF 1.917) Pub Date : 20210816
Han Xu, Nida Haram, D Chetty, R T Sang, I V LitvinyukWe present a technique for generating phaselocked twocolour pulses with controllable electric field waveform, whereby the polarization states of the two frequency components, as well as their intensities, relative phase and pulse delay can be completely controlled. To characterize the phase stability and the waveform of the output twocolour pulse in situ, we measured the momentum spectra of protons

Highorder harmonic generation by planar polyatomic molecules exposed to an orthogonally polarized twocolor laser field J. Phys. B: At. Mol. Opt. Phys. (IF 1.917) Pub Date : 20210816
D Habibović, W Becker, D B MiloševićThe molecular strongfield approximation is employed to study highorder harmonic generation by linear and planar polyatomic molecules exposed to an orthogonally polarized twocolor laser field, which consists of two orthogonal linearly polarized components with commensurable frequencies. For such a driving field, we find that the harmonic emission rate and the shape of the spectrum strongly depend

Probing the tunneling electron wave packet using the counterrotating bicircular fields J. Phys. B: At. Mol. Opt. Phys. (IF 1.917) Pub Date : 20210816
Peipei Ge, Meng Han, Yiqi Fang, Zhenning Guo, Yongkai Deng, Yunquan LiuWe experimentally measure the photoelectron momentum distributions of Ar atoms using twocolor 800nm (ω) + 400nm (2ω) counterrotating circularly polarized fields. By employing a weak fundamental circularly polarized field at 800nm, the atomic potential barrier formed by the strong second harmonic field at 400nm can be modulated. This introduces a spatially rotating temporal twoslit interferometry

Direct ab initio molecular dynamics study on the reactions of multivalence ionized states of water dimer J. Phys. B: At. Mol. Opt. Phys. (IF 1.917) Pub Date : 20210813
Tomoya Takada, Hiroto TachikawaWe investigated the reaction of multivalence (+2) ionization states of water dimer (H2O)2 using direct ab initio molecular dynamics method. The following multivalence ionization states were considered. In the direct twoelectron ionization state, (H2O)2 was ionized to form (H2O)2 2+ in one step; in the stepwise twoelectron ionization state, (H2O)2 was first converted to (H2O)2 + and further ionized

An improved laserdistillation method for complete enantioconversion of chiral mixtures J. Phys. B: At. Mol. Opt. Phys. (IF 1.917) Pub Date : 20210813
Chong Ye, YuYuan Chen, Quansheng Zhang, Yong LiLaserassisted enantioconversion is an ambitious issue related to chiral molecules in atomic, molecular, and optical physics. The theoretical laserdistillation method was proposed to realize enantioconversion based on a fourlevel doubleΔ model of two degenerated chiral ground states and two achiral excited states. Here, we reinvestigate and improve the laserdistillation method so that a chiral

Collective effects of organic molecules based on the Holstein–Tavis–Cummings model J. Phys. B: At. Mol. Opt. Phys. (IF 1.917) Pub Date : 20210813
Quansheng Zhang, Ke ZhangWe study the collective effects of an ensemble of organic molecules confined in an optical cavity based on the Holstein–Tavis–Cummings model. By using the quantum Langevin approach and adiabatically eliminating the degree of freedom of the vibrational motion, we analytically obtain the expression of the cavity transmission spectrum to analyze the features of polaritonic states. As an application, we

Oddparity autoionizing levels of uranium observed by twocolor twostep photoionization optogalvanic spectroscopy J. Phys. B: At. Mol. Opt. Phys. (IF 1.917) Pub Date : 20210813
M Miyabe, Y Sato, I Wakaida, R Terabayashi, V Sonnenschein, H Tomita, Y Zhao, T SakamotoTwocolor twostep photoionization optogalvanic spectroscopy was performed using highrepetitionrate titanium sapphire lasers and a uranium hollow cathode lamp to find the twostep resonance ionization schemes of uranium. Many ionization transitions were observed by exciting uranium atoms in a ground state into five, even parity, excited levels with the firststep laser and by scanning the secondstep

Angular momentum distribution in a relativistic configuration: magnetic quantum number analysis J. Phys. B: At. Mol. Opt. Phys. (IF 1.917) Pub Date : 20210813
Michel Poirier, JeanChristophe PainThis paper is devoted to the analysis of the distribution of the total magnetic quantum number M in a relativistic subshell with N equivalent electrons of momentum j. This distribution is analyzed through its cumulants and through their generating function, for which an analytical expression is provided. This function also allows us to get the values of the cumulants at any order. Such values are useful

On the rules for filling electron shells and the properties of the atomic Hamiltonian J. Phys. B: At. Mol. Opt. Phys. (IF 1.917) Pub Date : 20210813
A A Danshin, M I Gurevich, A A KovalishinThe aim of this work is to determine the dependence of the total energy of the atomic system on the mutual orientation of the orbital angular moments of electrons. It is shown that the minimum value of the energy is attained for those configurations that are an eigenfunction of the orbital angular momentum operator . Thus, at least for individual atoms of the periodic table it is shown that Dirac’s

Oscillations of a quasionedimensional dipolar supersolid J. Phys. B: At. Mol. Opt. Phys. (IF 1.917) Pub Date : 20210812
B Kh Turmanov, B B Baizakov, F Kh Abdullaev, M SalernoThe properties of a supersolid state (SS) in quasionedimensional dipolar Bose–Einstein condensate is studied, considering two possible mechanisms of realization—due to repulsive threebody atomic interactions and quantum fluctuations in the framework of the Lee–Huang–Yang theory. The role of both mechanisms in the formation of SS properties has been emphasized. The proposed theoretical model, based

Confinement enhanced spin–orbit interchannel coupling effect on the atomic photoionization J. Phys. B: At. Mol. Opt. Phys. (IF 1.917) Pub Date : 20210812
Afsal Thuppilakkadan, Jobin Jose, Hari R VarmaThe photoionization crosssection of an atom trapped inside a fullerene anion in the nearthreshold region is dominated by the Coulomb confinement resonances. These prominent structures facilitate the possibility of an enhanced spin–orbit interaction activated interchannel coupling (SOIAIC) leading to significant modifications of the photoionization parameters even for lowZ confined atomic systems

Twodimensional correlation analysis for xray photoelectron spectroscopy J. Phys. B: At. Mol. Opt. Phys. (IF 1.917) Pub Date : 20210812
S Li, T Driver, A Al Haddad, E G Champenois, M Agker, O Alexander, T Barillot, C Bostedt, D Garratt, L Kjellsson, A A Lutman, JE Rubensson, C Sathe, A Marinelli, J P Marangos, J P CryanXray photoelectron spectroscopy (XPS) measures the binding energy of corelevel electrons, which are welllocalised to specific atomic sites in a molecular system, providing valuable information on the local chemical environment. The technique relies on measuring the photoelectron spectrum upon xray photoionisation, and the resolution is often limited by the bandwidth of the ionising xray pulse

Dissociation and ionization dynamics of CF3I and CH3I molecules via pumpandprobe experiments using soft xray freeelectron laser J. Phys. B: At. Mol. Opt. Phys. (IF 1.917) Pub Date : 20210811
T Gejo, T Nishie, T Nagayasu, K Tanaka, Y Tanaka, A Niozu, K Nagaya, R Yamamura, N Futamata, T Suenaga, O Takahashi, T Togashi, S Owada, H Fujise, A Verna, M Yabashi, M OuraThe dissociation and ionization dynamics of CF3I and CH3I molecules were investigated using a pumpandprobe technique that employs a soft xray freeelectron laser (SACLA) in Japan. First, timeresolved innershell photoelectron spectroscopy was employed to observe the ultrafast reaction of CF3I by monitoring iodine 4d electrons. The change in the I 4d state observed in the photoelectron spectra is

Lowenergy interference structure with attosecond temporal resolution J. Phys. B: At. Mol. Opt. Phys. (IF 1.917) Pub Date : 20210811
Xiaohong Song, Ming Zhu, Xiwang Liu, Hongdan Zhang, Wenbin Jia, Qibing Xue, Cheng Lin, Wei Quan, Jing Chen, XiaoJun Liu, Weifeng YangAccessing precisely the phase variation of electronic wavepacket (EWP) provides unprecedented spatiotemporal information of the microworld. A radial interference pattern at nearzero energy has been widely observed in experiments of strongfield photoionization. Here we report an experimental and theoretical investigation of this lowenergy interference structure (LEIS) in midinfrared laser fields

Abovethreshold ionization driven by Gaussian laser beams: beyond the electric dipole approximation J. Phys. B: At. Mol. Opt. Phys. (IF 1.917) Pub Date : 20210811
B Bning, S FritzscheStrongfield atomic experiments have recently become sensitive to nondipole (magnetic) interactions. In particular, photoelectrons emitted in abovethreshold ionization possess a nonzero momentum along the beam axis as a result of the Lorentz force. Here, we show how this longitudinal momentum can be theoretically calculated based on a nondipole strongfield approximation that accounts not only for

Referenceframeindependent measurementdeviceindependent quantum key distribution with imperfect sources J. Phys. B: At. Mol. Opt. Phys. (IF 1.917) Pub Date : 20210805
JianRong Zhu, ChunMei Zhang, Qin WangReferenceframeindependent measurementdeviceindependent quantum key distribution (RFIMDIQKD) can remove all potential detector sidechannel attacks and the requirement of realtime alignment of reference frames. However, all previous RFIMDIQKD implementations assume the perfect state preparation in sources, which is impractical and may lead to security loopholes. Here, we propose an RFIMDIQKD

Energy and angular distributions of electrons from sodium atoms photoionized with femtosecond laser pulses J. Phys. B: At. Mol. Opt. Phys. (IF 1.917) Pub Date : 20210805
Y Boran, N Hart, N Kaya, J Zhou, A A Kolomenskii, H A SchuesslerWe studied photoelectron angular distributions (PADs) and energy spectra of sodium atoms photoionized with intense short laser pulses in the nearinfrared region. Energy spectra of photoelectrons due to multistep ionization of sodium atoms through intermediate levels 5p, 6p, 7p, and 4f were observed in above threshold ionization (ATI) at laser intensities of 2 1013Wcm−2 and 1 1013Wcm−2. The PADs from

Laser cooling with threelevel cascade transitions: a study for group II atoms and ytterbium J. Phys. B: At. Mol. Opt. Phys. (IF 1.917) Pub Date : 20210805
Wictor C Magno, Flavio C CruzWe analyze laser cooling of twoelectron atoms with threelevel cascade transitions, involving the usual 1S0–1P1 cooling transition coupled to either 1S0 or 1D2 states. We numerically calculate minimum temperatures for the most abundant even isotopes of group II atoms and ytterbium (which lack hyperfine structure), derive general analytical expressions from a perturbative approach, and discuss the

Influence of nonadiabatic, nondipole and quantum effects on the attoclock signal J. Phys. B: At. Mol. Opt. Phys. (IF 1.917) Pub Date : 20210805
Yongzhe Ma, Jinyu Zhou, Peifen Lu, Hongcheng Ni, Jian WuThe attoclock is an important tool offering the capability to time resolve tunneling ionization. In this article, we systematically study the influence of nonadiabatic, nondipole and quantum effects on the attoclock signal. In contrast to previous studies, where a single peak offset angle is used to represent the attoclock information, we survey the whole momentum distribution of the attoclock signal

Susceptibility of trappedion qubits to lowdose radiation sources J. Phys. B: At. Mol. Opt. Phys. (IF 1.917) Pub Date : 20210805
Jiafeng Cui, A J Rasmusson, Marissa D’Onofrio, Yuanheng Xie, Evangeline Wolanski, Philip RichermeWe experimentally study the realtime susceptibility of trappedion quantum systems to small doses of ionizing radiation. We expose an iontrap apparatus to a variety of α, β, and γ sources and measure the resulting changes in trappedion qubit lifetimes, coherence times, gate fidelities, and motional heating rates. We found no quantifiable degradation of ion trap performance in the presence of lowdose

Engineering of the qubit initialization in an imperfect physical system J. Phys. B: At. Mol. Opt. Phys. (IF 1.917) Pub Date : 20210805
Tianfeng Chen, Lin Wan, Jiamin Qiu, Hong Peng, Jie Lu, Ying YanWe propose a method to engineer the light matter interaction while initializing a qubit present of physical constraints utilizing the inverse engineering. Combining the multiple degrees of freedom in the pulse parameters with the perturbation theory, we develop pulses to initialize the qubit within a tightly packed frequency interval to an arbitrary superposition state with high fidelity. Importantly

A theoretical study of subcarrierwave quantum key distribution system integration with an optical transport network utilizing dense wavelength division multiplexing J. Phys. B: At. Mol. Opt. Phys. (IF 1.917) Pub Date : 20210805
F Kiselev, N Veselkova, R Goncharov, V EgorovIn this paper we study the performance of subcarrierwave quantum key distribution (SCW QKD) in the presence of classical channels of optical transport network utilizing dense wavelength division multiplexing (DWDM). We consider the impact of spontaneous Raman scattering noise as well as the fourwave mixing and channel isolation efficiency. We calculate quantum bit error rate as well as the secure

Phase squeezing of quantum hypergraph states J. Phys. B: At. Mol. Opt. Phys. (IF 1.917) Pub Date : 20210805
Ramita Sarkar, Supriyo Dutta, Subhashish Banerjee, Prasanta K PanigrahiCorresponding to a hypergraph G with d vertices, a quantum hypergraph state is defined by , where f is a dvariable Boolean function depending on the hypergraph G, and denotes a binary vector of length 2 d with 1 at the nth position for n = 0, 1, …(2 d − 1). The nonclassical properties of these states are studied. We consider the annihilation and creation operator on the Hilbert space of dimension

Vibrational effects on generalized oscillator strengths of ammonia J. Phys. B: At. Mol. Opt. Phys. (IF 1.917) Pub Date : 20210805
Noboru Watanabe, Masahiko TakahashiAb initio calculations of generalized oscillator strengths (GOSs) are carried out to investigate the influence of nuclear dynamics on electronimpact electronic excitations in ammonia. Momentumtransferdependent GOSs or GOS profiles are calculated for transitions to the three lowest excited singletstates at the equationofmotion coupledcluster singles and doubles level, and comparison is made with

Photodissociation dynamics of methyl iodide across the Aband probed by femtosecond extreme ultraviolet photoelectron spectroscopy J. Phys. B: At. Mol. Opt. Phys. (IF 1.917) Pub Date : 20210805
Briony DownesWard, Emily M Warne, Joanne Woodhouse, Michael A Parkes, Emma Springate, Philip A J Pearcy, Yu Zhang, Gabriel Karras, Adam S Wyatt, Richard T Chapman, Russell S MinnsThe dissociation dynamics of CH3I at three UV pump wavelengths (279nm, 254nm, 243nm) are measured using an extreme ultraviolet probe in a timeresolved photoelectron spectroscopy experiment. The results are compared with previously published data at a pump wavelength of 269nm, [2020, Phys. Chem. Chem. Phys., 22, 25695], with complementary photoelectron spectroscopy experiments performed using a multiphoton

Analysis of the bosonic pair creation in a static potential well J. Phys. B: At. Mol. Opt. Phys. (IF 1.917) Pub Date : 20210805
M Jiang, N S Lin, D D Su, Y J LiWe study the pair creation process of bosonic systems in a timeindependent potential well by numerically solving the Klein–Gordon equation. In order to study the effect of multiple bound states on the creation process, broad widths of the potential well are chosen. The energy eigenvalues are calculated by diagnosing the nonHermitian Hamiltonian with applied fields, and the exponential growing factor

Investigating properties of Cl− and Au− ions using relativistic manybody methods J. Phys. B: At. Mol. Opt. Phys. (IF 1.917) Pub Date : 20210708
B K SahooWe investigate the ground state properties of singly charged chlorine (Cl−) and gold (Au−) negative ions by employing fourcomponent relativistic manybody methods. In our approach, we attach an electron to the respective outer orbitals of chlorine (Cl) and gold (Au) atoms to determine the Dirac–Fock (DF) wave functions of the ground state configurations of Cl− and Au−, respectively. As a result, all

A versatile ring trap for quantum gases J. Phys. B: At. Mol. Opt. Phys. (IF 1.917) Pub Date : 20210629
Mathieu de Gor de Herve, Yanliang Guo, Camilla De Rossi, Avinash Kumar, Thomas Badr, Romain Dubessy, Laurent Longchambon, Hlne PerrinWe report on the confinement of a Bose–Einstein condensate in an annular trap with widely tunable parameters. The trap relies on a combination of magnetic, optical and radiofrequency fields. The loading procedure is discussed. We present annular traps with radii adjusted between 20 and 150 μm. We demonstrate the preparation of persistent flows both with a rotating laser stirrer and with a global quadrupole

Photodissociation dynamics of water molecule at short photon wavelengths: full dimensional potential energy surface of Rydberg states J. Phys. B: At. Mol. Opt. Phys. (IF 1.917) Pub Date : 20210629
Yigeng Peng, Xiaoqing Hu, Yong Wu, Jianguo Wang, Ruifeng Lu, Nicolas SisouratIn this work, we have combined the multireference doubleexcitation configuration interaction method, developed by Buenker and Peyerimhoff (1974 Theor. Chim. Acta 35 33), with molecular orbitals optimized with a multiconfigurational selfconsistentfield approach. Using the example of the water molecule, we show that such a combined technique lowers the computational costs while improving the overall