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Scattering of orthopositronium off helium target has been investigated using close-coupling method in the energy range 0–110 eV. Two basis sets, (a) Ps ( 1 s ) + He ( 1 s 2 , 1 s 2 1 s , 1 s 2 1 p ) and (b) Ps ( 1 s , 2 p ) + He ( 1 s 2 , 1 s 2 1 s , 1 s 2 1 p ) , have been employed to find the...
The 2 p photoelectron spectrum of free Mn atoms is presented. The experimental results are interpreted with the aid of Hartree-Fock calculations. Multiplet splitting and valence-shell recoupling in the core excited state give rise to the numerous main and satellite lines observed. The strong...
van der Waals coefficients for the heteronuclear alkali-metal dimers of Li, Na, K, Rb, Cs, and Fr are calculated using relativistic ab initio methods augmented by high-precision experimental data. We argue that the uncertainties in the coefficients are unlikely to exceed about 1%.
The Schmidt number of a mixed state characterizes the minimum Schmidt rank of the pure states needed to construct it. We investigate the Schmidt number of an arbitrary mixed state by studying Schmidt-number witnesses that detect it. We present a canonical form of such witnesses and provide...
We show that it is impossible to determine the time a tunneling particle spends under the barrier. However, it is possible to determine the asymptotic time, i.e., the time the particle spends in a large area including the barrier. We propose a model of time measurements. The model provides a...
Collisional relaxation of highly rotating hydrogen molecules is investigated as a function of energy. Calculations demonstrate that inelastic collisions are dramatically suppressed for specific rotational levels of the molecule as the energy is lowered due to the closing of quasiresonant...
A recent work Pegg et al. , Phys. Rev. Lett. 81 , 1604 (1998) showed how to generate a running-wave superposition of zero- and one-photon field states, C 0 | 0 〉 + C 1 | 1 〉 , by physical truncation of the photon number superposition making up a coherent state. Here we discuss the extension...
By employing the equation derived by Amusia and Shaginyan in their comment on our work, we show that the potential corresponding to a time-dependent density is a noncausal functional of the density. We further strengthen this conclusion on the basis of the exact equation satisfied by the density.
The local-spin-density functional method, with an optimized effective potential and self-interaction correction, is used to study the energy structure of hollow atoms and ions in the bulk of metallic materials. The energy structure of conduction electrons in the bulk of metallic material is...
We investigate the low-lying excitations of a weakly interacting, harmonically trapped Bose-Einstein condensed gas under rotation, in the limit where the angular mometum L of the system is much less than the number of the atoms N in the trap. We show that in the asymptotic limit N → ∞ the...
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