Density dynamics in some quantum systems

Dynamics of quantum systems.

A relation between the eigenvalues of an effective Hamilton operator and the poles of the S matrix is derived that holds for isolated as well as for overlapping resonance states. The system may be a many-particle quantum system with two-body forces between the constituents or it may be a quantum billiard without any two-body forces. Avoided crossings of discrete states as well as of resonance s...

Dynamics of entangled quantum optical system in independent media

We study the dynamics of two three-level atoms interacting with independent bosonic Lorentzian reservoirs at zero temperature. Such systems can be created in far astronomical objects. Quantum mechanical behaviour of these particles can produce detectable effects on the spectroscopic identifications of these objects, if such behaviour remain stable during the interaction with their media. It is ...

Dynamics of Open Quantum Systems

Examples of Quantum Dynamics in Optomechanical Systems

Optomechanical systems exploit the interaction between the optical radiation field and mechanical resonators in a laser-driven cavity. In the past few years, these systems have been the focus of considerable experimental and theoretical attention, yielding promising successes, particularly in using optomechanical cooling to reduce the thermal occupation of the resonators. This offers the prospe...

Environment-governed dynamics in driven quantum systems.

We show that the dynamics of a driven quantum system weakly coupled to the environment can exhibit two distinct regimes. While the relaxation basis is usually determined by the system+drive Hamiltonian (system-governed dynamics), we find that under certain conditions it is determined by specific features of the environment, such as, the form of the coupling operator (environment-governed dynami...