The largest hyperfine interaction coefficients in the hydrogen molecular ion HD+, i.e., the electron-proton and electron-deuteron spin-spin scalar interactions, are calculated with estimated uncertainties slightly below 1 ppm. The (Zα)2EF relativistic correction for which a detailed derivation is presented, QED corrections up to the order α3ln2(α) along with an estimate of higher-order terms, and nuclear

The superposition principle is fundamental to quantum theory. Yet a recent no-go theorem has proved that quantum theory forbids superposition of unknown quantum states, even with nonzero probability. The implications of this result, however, remain poorly understood so far. In this Rapid Communication we show that the existence of a protocol that superposes two unknown pure states with nonzero probability

DOI:https://doi.org/10.1103/PhysRevA.102.050001

We report theoretical determination of the dipole polarizability of the neon atom, including its frequency dependence. Corrections for the relativistic, quantum electrodynamics, finite nuclear mass, and finite nuclear size effects are taken into account. We obtain the value α0=2.66080(36) for the static polarizability, and α2=2.850(7) and α4=4.932(14) for the first two polarizability dispersion coefficients