Dynamics of Two-level Atom Interaction with Single-mode Field

A Generalized Hamiltonian Characterizing the Interaction of the Two–Level Atom and both the Single Radiation Mode and External Field

In this paper we propose some Hamiltonian characterizing the interaction of the two–level atom and both the single radiation mode and external field, which might be a generalization of that of Schön and Cirac (quant-ph/0212068). We solve them in the strong coupling regime under some conditions (the rotating wave approximation, resonance condition and etc), and obtain unitary transformations of ...

Two-Level Atom-Field Interaction: Exact Master Equations for Non-Markovian Dynamics, Decoherence and Relaxation

We perform a firstprinciples derivation of the general master equation to study the nonMarkovian dynamics of a two-level atom (2LA) interacting with an electromagnetic field (EMF). We use the influence functional method which can incorporate the full backreaction of the field on the atom, while adopting Grassmannian variables for the 2LA and the coherent state representation for the EMF. We fin...

Theory of single-photon transport in a single-mode waveguide. I. Coupling to a cavity containing a two-level atom

The single-photon transport in a single-mode waveguide, coupled to a cavity embedded with a two-level atom, is analyzed. The single-photon transmission and reflection amplitudes, as well as the cavity and the atom excitation amplitudes, are solved exactly via a real-space approach. It is shown that the dissipations of the cavity and of the atom, respectively, affect distinctively on the transpo...

Interaction of a Two-Level Cyclic XY n-Spin Model With a Two-Mode Cavity Field in Off-Resonant States

The interaction of the XY n-spin cyclic model with a two-mode cavity field in the rotating-wave approximation is investigated in the framework of a generalized Jaynes–Cummings two-level system consisting of the vacuum state and a thermally averaged manifold of excited sates. Computation of the energy of this manifold allows this interaction to be examined in off-resonant states. Time evolution ...

Dynamics in a Two-Level Atom Magneto-Optical Trap