Decoherence-free evolution of time-dependent superposition states of two-level systems and thermal effects
arXiv:1109.0655 · doi:10.1103/PhysRevA.84.012112
Abstract
In this paper we detail some results advanced in a recent letter [Prado et al., Phys. Rev. Lett. 102 073008 (2009)] showing how to engineer reservoirs for two-level systems at absolute zero by means of a time-dependent master equation leading to a nonstationary superposition equilibrium state. We also present a general recipe showing how to build nonadiabatic coherent evolutions of a fermionic system interacting with a bosonic mode and investigate the influence of thermal reservoirs at finite temperature on the fidelity of the protected superposition state. Our analytical results are supported by numerical analysis of the full Hamiltonian model.
7 pages, 4 figures
References in corpus (8)
- Quantum States and Phases in Driven Open Quantum Systems with Cold Atoms
- Deterministic single-photon source from a single ion
- Frequency up- and down-conversions in two-mode cavity quantum electrodynamics
- Bilinear and quadratic Hamiltonians in two-mode cavity quantum electrodynamics
- Nonadiabatic coherent evolution of two-level systems under spontaneous decay
- One-step generation of high-quality squeezed and EPR states in cavity QED
- Implementation of holonomic quantum computation through engineering and manipulating environment
- Observable geometric phase induced by a cyclically evolving dissipative process