Amplification and suppression of system-bath correlation effects in an open many-body system

Abstract

Understanding the rich dynamics of open quantum systems is of fundamental interest to quantum control and quantum information processing. By considering an open system of many identical two-level atoms interacting with a common bath, we show that effects of system-bath correlations are amplified in a many-body system via the generation of a short time scale inversely proportional to the number of atoms. Effects of system-bath correlations are therefore considerable even when each individual atom interacts with the bath weakly. We further show that correlation-induced dynamical effects may still be suppressed via the dynamical decoupling approach, but they present a challenge for quantum state protection as the number of atom increases.

3 figures, 21 pages, under review (submitted for publication on Oct. 8, 2012)

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Cited by in corpus (18)

• Role of initial system-environment correlations: A master equation approach
• Extracting Information from Qubit-Environment Correlations
• Effects of initial system-environment correlations on open quantum system dynamics and state preparation
• Dephasing-assisted parameter estimation in the presence of dynamical decoupling
• Improving the estimation of environment parameters via initial probe-environment correlations
• Effect of initial system-environment correlations with spin environments
• Enhancement of coherence in qubits due to interaction with environment
• Geometric phase corrected by initial system-environment correlations
• Continuous dynamical decoupling of spin chains: modulating the spin-environment and spin-spin interactions
• The quantum Zeno and anti-Zeno effects: from weak to strong system-environment coupling
• Peculiarities of qubit initial-state preparation by nonselective measurements on an overcomplete basis
• The initial system-bath state via the maximum-entropy principle
• Modified coherence of quantum spins in a damped pure-dephasing model
• The quantum Zeno and anti-Zeno effects with strong system-environment coupling
• The quantum Zeno and anti-Zeno effects with non-selective measurements
• Adapted projection operator technique for the treatment of initial correlations
• Time evolution of quantum correlations in presence of state dependent bath
• A master equation incorporating the system-environment correlations present in the joint equilibrium state