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12 papers · 1 filter
Rigorous results on approach to thermal equilibrium, entanglement, and nonclassicality of an optical quantum field mode scattering from the elements of a non-equilibrium quantum reservoir
Stephan De Bievre, Marco Merkli, Paul E. Parris
Rigorous derivations of the approach of individual elements of large isolated systems to a state of thermal equilibrium, starting from arbitrary initial states, are exceedingly rar…
Long-Range Tails in van der Waals Interactions of Excited-State and Ground-State Atoms
U. D. Jentschura, V. Debierre
A quantum electrodynamic calculation of the interaction of an excited-state atom with a ground-state atom is performed. For an excited reference state and a lower-lying virtual sta…
Adjacency Graphs and Long-Range Interactions of Atoms in Quasi-Degenerate States: Applied Graph Theory
C. M. Adhikari, V. Debierre, U. D. Jentschura
We analyze, in general terms, the evolution of energy levels in quantum mechanics, as a function of a coupling parameter, and demonstrate the possibility of level crossings in syst…
Theory of noncontact friction for atom-surface interactions
U. D. Jentschura, M. Janke, M. DeKieviet
The noncontact (van der Waals) friction is an interesting physical effect which has been the subject of controversial scientific discussion. The "direct" friction term due to the t…
Non-Contact Friction for Ion-Surface Interactions
U. D. Jentschura, G. Lach
Non-contact friction forces are exerted on physical systems through dissipative processes, when the two systems are not in physical contact with each other, or, in quantum mechanic…
Functional Form of the Imaginary Part of the Atomic Polarizability
U. D. Jentschura, K. Pachucki
The dynamic atomic polarizability describes the response of the atom to incoming electromagnetic radiation. The functional form of the imaginary part of the polarizability for smal…