Coherent many-photon dynamics of two-level atom in nonideal cavity

L. Chotorlishvili, Z. Z. Toklikishvili

Sergey N. Agapov, Alexander V. Gorokhov

We investigated numerically the time-dependent behavior of atoms populations and mean number of photons in cavities with losses. To derive the dynamic equations, we used the method of oscillator and atomic coherent states. We also took into account the various locations of the atoms in the cavity and their movement through the cavity. The losses of photons in the cavities were considered in the Wigner-Weisskopf approximation.

Eugene K. Bashkirov, Русакова Маргарита Сергеевна

The dynamics of detuned two-level Jaynes-Cummings model with multiphoton transitions in the finite Q-cavity has been considered. The time evolution of the mean photon number and atomic populations has been investigated for various values of the model parameters. The type of field statistics and photon bunching/antibunching effects has been examined.

Abinet Yeshiwas

Alexander V. Gorokhov

The influence of chaotic behavior of coherent state (CS) parameters on entanglement dynamics in system of two level atoms and photons in cavity is investigated. The initial state of the system is chosen as factorized production of photon and atomic coherent states. To find a solution of the Schrödinger equation, we presented the time-dependent wave function in the form of a wave packet in CS representation. The phase portraits and Poincare sections for classical dynamics of CS were computed, and time dependence of the mean number of photons level populations and atomic entropy were calculated in quantum case. The analysis showed that the chaotic behavior in quantum-optical Dicke model increases the degree of entanglement in the atomic subsystem. At the same time greater entanglement is generated when selecting the initial atomic CS parameters near the center of the corresponding Poincare sections. It is considered dynamics of two identical two-level atoms in non-ideal cavity (nonideal Tavis-Cummings model). Accounting for decay showed that the generation of atomic entanglement is accompanied by the return of the initial separable state (”death” of entanglement), but this behavior with the increase of the initial parameter of the field CS is only at sufficiently small times. Influence of detuning and damping constants are considered.

Andreas Neuzner, Matthias Körber, Olivier Morin +2 more