scholarly journals Probing cosmic axions through resonant emission and absorption in atomic systems with superradiance

2019 ◽  
Vol 100 (3) ◽  
Author(s):  
Guo-yuan Huang ◽  
Shun Zhou
Keyword(s):  
Atomic Systems ◽  
Resonant Emission

Theoretical progress in the H2+ molecular ion: towards electron to proton mass ratio determinationThis paper was presented at the International Conference on Precision Physics of Simple Atomic Systems, held at École de Physique, les Houches, France, 30 May – 4 June, 2010.

2011 ◽  
Vol 89 (1) ◽  
pp. 103-107 ◽  
Author(s):  
J.-Ph. Karr ◽  
L. Hilico ◽  
V. I. Korobov
Keyword(s):  
High Resolution ◽  
Mass Ratio ◽  
Theoretical Determination ◽  
Atomic Systems ◽  
The Road ◽  
Theoretical Progress ◽  
Proton Mass ◽  
Accuracy Level ◽  
Ratio Determination

High resolution ro-vibrational spectroscopy of H 2+ or HD+ can lead to a significantly improved determination of the electron to proton mass ratio me/mp if the theoretical determination of transition frequencies becomes sufficiently accurate. We report on recent theoretical progress in the description of the hyperfine structure of H 2+ , as well as first steps in the evaluation of radiative corrections at order mα7. Completion of the latter calculation should allow us to reach the projected 10−10 accuracy level and open the road to mass ratio determination.

scholarly journals Semiclassical calculations of the quadruple excited four-electron systems

2007 ◽  
pp. 33-44
Author(s):  
N. Simonovic ◽  
M. Predojevic ◽  
V. Pankovic ◽  
P. Grujic
Keyword(s):  
Energy Levels ◽  
Point Of View ◽  
Interstellar Space ◽  
Vibrational Modes ◽  
Electron Systems ◽  
Atomic Systems ◽  
Excited Atoms ◽  
Relative Contribution ◽  
Quantum Numbers ◽  
Semiclassical States

Highly excited atoms acquire very large dimensions and can be present only in a very rarified gas medium, such as the interstellar space. Multiply excited beryllium-like systems, when excited to large principal quantum numbers, have a radius of r ? 10 ?. We examine the semiclassical spectrum of quadruple highly excited four-electron atomic systems for the plane model of equivalent electrons. The energy of the system consists of rotational and vibrational modes within the almost circular orbit approximation, as used in a previous calculation for the triply excited three-electron systems. Here we present numerical results for the beryllium atom. The lifetimes of the semiclassical states are estimated via the corresponding Lyapunov exponents. The vibrational modes relative contribution to the energy levels rises with the degree of the Coulombic excitation. The relevance of the results is discussed both from the observational and heuristic point of view.

Advances in optical two-dimensional spectroscopy applied to the study of semiconductor and atomic systems

2010 ◽  
Author(s):  
Alan D. Bristow ◽  
Xingcan Dai ◽  
Denis Karaiskaj ◽  
Galan A. Moody ◽  
Steven T. Cundiff
Keyword(s):  
Two Dimensional ◽  
Atomic Systems

scholarly journals Exact results for ionization of model atomic systems

2010 ◽  
Vol 51 (1) ◽  
pp. 015211 ◽  
Author(s):  
O. Costin ◽  
J. L. Lebowitz ◽  
C. Stucchio ◽  
S. Tanveer
Keyword(s):  
Exact Results ◽  
Atomic Systems

Nonlinear selective reflection in cascade three-level atomic systems

1993 ◽  
Vol 47 (1) ◽  
pp. 519-528 ◽  
Author(s):  
F. Schuller ◽  
O. Gorceix ◽  
M. Ducloy
Keyword(s):  
Selective Reflection ◽  
Atomic Systems

Dynamic multipole polarizabilities of atomic systems

1980 ◽  
Vol 17 (4) ◽  
pp. 673-678 ◽  
Author(s):  
S. I. Easa ◽  
G. C. Shukla
Keyword(s):  
Atomic Systems

Physical properties of many-electron atomic systems evaluated from analytical Hartree-Fock functions

1968 ◽  
Vol 10 (5) ◽  
pp. 388-392 ◽  
Author(s):  
Jon Thorhallsson ◽  
Carolyn Fisk ◽  
Serafin Fraga
Keyword(s):  
Physical Properties ◽  
Atomic Systems ◽  
Hartree Fock

scholarly journals Mesoscopic coherence in light scattering from cold, optically dense and disordered atomic systems

2017 ◽  
Vol 671 ◽  
pp. 1-60 ◽  
Author(s):  
D.V. Kupriyanov ◽  
I.M. Sokolov ◽  
M.D. Havey
Keyword(s):  
Light Scattering ◽  
Atomic Systems
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