Population Dynamics of Excited Atoms in Dissipative Cavities

Abstract

Population dynamics of excited atoms in dissipative cavities is investigated in this work. We present a method of controlling populations of excited atoms in dissipative cavities. For the initial state |ee AB |00 ab , the repopulation of excited atoms can be obtained by using atom-cavity couplings and non-Markovian effects after the atomic excited energy decays to zero. For the initial state |gg AB |11 ab , the two atoms can also be populated to the excited states from the initial ground states by using atom-cavity couplings and nonMarkovian effects. And the stronger the atom-cavity coupling or the non-Markovian effect is, the larger the number of repopulation of excited atoms is. Particularly, when the atomcavity coupling or the non-Markovian effect is very strong, the number of repopulation of excited atoms can be close to one in a short time and will tend to a steady value in a long time.

Time-invariant discord and steady-state entanglement in engineered non-equilibrium dephasing environments

“…respectively, where c =  t Ft max , ( ) { ( ) }. Quantum discord may easily calculate by using equations ( 9) and (10).…”

“…This decoherence phenomenon is the main obstacle for the development of quantum technologies. Therefore, knowing the dynamical behaviors of quantum correlations in various physical sources of decoherence and consequently exploring different protection strategies is pivotal for their practical implementation in quantum devices [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22].…”