FROM BLOCH MODEL TO THE RATE EQUATIONS II: THE CASE OF ALMOST DEGENERATE ENERGY LEVELS [PDF]
Mathematical Models and Methods in Applied Sciences, 2004 Bloch equations give a quantum description of the coupling between atoms and a driving electric force. It is commonly used in optics to describe the interaction of a laser beam with a sample of atoms. In this paper, we address the asymptotics of these equations for a high frequency electric field, in a weak coupling regime.
Brigitte Bidégaray-Fesquet +3 more
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Photoionization of Electrons in Degenerate Energy Level of Hydrogen Atom Induced by Strong Laser Pulses [PDF]
Photonics, 2022 Photoionization dynamics of bounded electrons in the ground state, the first and second excited states of a hydrogen atom, triggered by ultrashort near-infrared laser pulses, have been investigated in a transition regime (γ∼1) that offers both multiphoton and tunneling features.
Peipei Xin +4 more
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Spin–spin relaxation of nuclear quadrupole resonance coherences and the important role of degenerate energy levels [PDF]
Molecular Physics, 2020 We present an extension of a Redfield approach for calculating spin–spin relaxation rates of zero-field nuclear quadrupole resonance (NQR) coherences, which was published in [Kruk et al., PCCP, 201...
Christian Gösweiner +2 more
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Application of quasi-degenerate perturbation theory to the calculation of rotational energy levels of methane vibrational polyads [PDF]
The Journal of Chemical Physics, 2015 In previous works, we have introduced an alternative perturbation scheme to find approximate solutions of the spectral problem for the rotation-vibration molecular Hamiltonian. An important feature of our approach is that the zero order Hamiltonian is the direct product of a purely vibrational Hamiltonian with the identity on the rotational degrees of ...
Patrick Cassam-Chenaı̈ +4 more
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Nonlinear propagation of polarized light pulses in a medium of atoms with degenerate energy levels: Adiabatic approach [PDF]
Physical Review A, 2013 12 pages, 4 ...
V. I. Yudin +3 more
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Lamb shift of non-degenerate energy level systems placed between two infinite parallel conducting plates [PDF]
Journal of Physics A: Mathematical and Theoretical, 2012 submit ...
Baptiste Billaud, T-T Truong
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Diagrammatic treatment of coherent backscattering of intense light by cold atoms with degenerate energy levels [PDF]
Physical Review A, 2014 We present a generalization of the diagrammatic pump-probe approach to coherent backscattering (CBS) of intense laser light for atoms with degenerate energy levels. We employ this approach for a characterization of the double-scattering signal from optically pumped atoms with the transition ${J}_{g}\ensuremath{\rightarrow}{J}_{e}={J}_{g}+1$ in the ...
Vyacheslav Shatokhin +3 more
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Coherent backscattering of intense light by cold atoms with degenerate energy levels: Diagrammatic treatment [PDF]
Phys. Rev. A 90, 023850 (2015), 2014 We present a generalization of the diagrammatic pump-probe approach to coherent backscattering (CBS) of intense laser light for atoms with degenerate energy levels. We employ this approach for a characterization of the double scattering signal from optically pumped atoms with the transition $J_g\rightarrow J_e=J_g+1$ in the helicity preserving ...
Shatokhin, V. N. +3 more
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Riemann-Hilbert Problem with Higher Order Poles for Self-Induced Transparency with Degenerate Energy Levels [PDF]
Australian Journal of Physics, 1988 We have analysed the inverse problem for self-induced transparency with degenerate energy levels (DSIl) via the Riemann-Hilbert methodology with second order poles. The required formulae are deduced in detail and the corresponding soliton solutions are obtained. It is noticed that the profile of the single soliton is not of the usual sech type.
A. Roy Chowdhury, Mrityunjoy De
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Discrete & Continuous Dynamical Systems - S, 2021 <p style='text-indent:20px;'>In this paper, we consider a class of finitely degenerate coupled parabolic systems. At high initial energy level <inline-formula><tex-math id="M1">\begin{document}$ J(u_{0})>d $\end{document}</tex-math></inline-formula>, we present a new sufficient condition to describe the global ...
Yuxuan Chen, Jiangbo Han
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