Overlapping Resonances in the Resistance of Superposition States to Decoherence
arXiv:1001.4134 · doi:10.1063/1.3460262
Abstract
Overlapping resonances are shown to provide new insights into the extent of decoherence experienced by a system superposition state in the regime of strong system- environment coupling. As an example of this general approach, a generic system comprising spin-half particles interacting with a thermalized oscillator environment is considered. We find that (a) amongst the collection of parametrized Hamiltonians, the larger the overlapping resonances contribution, the greater the maximum possible purity, and (b) for a fixed Hamiltonian, the larger the overlapping resonances contribution, the larger the range of possible values of the purity as one varies the phases in the system superposition states. Systems displaying decoherence free subspaces show that largest overlapping resonances contribution.
5 figures, submitted
References in corpus (8)
- Decoherence Free Subspaces for Quantum Computation
- Dynamical Decoupling of Open Quantum Systems
- Dynamical suppression of decoherence in two-state quantum systems
- Dynamics of a two-level system strongly coupled to a high-frequency quantum oscillator
- Decoherence, Entanglement and Irreversibility in Quantum Dynamical Systems with Few Degrees of Freedom
- Mechanisms in Adaptive Feedback Control: Photoisomerization in a Liquid
- Exponentially rapid decoherence of quantum chaotic systems
- Overlapping resonances in the control of intramolecular vibrational redistribution