Entanglement and quantum discord dynamics of two atoms under practical feedback control
arXiv:1104.1488 · doi:10.1103/PhysRevA.84.012316
Abstract
We study the dynamics of two identical atoms resonantly coupled to a single-mode cavity under practical feedback control, and focus on the detection inefficiency. The entanglement is induced to vanish in finite time by the inefficiency of detection. Counterintuitively, the asymptotic entanglement and quantum discord can be increased by the inefficiency of detection. The noise of detection triggers control field to create entanglement and discord when no photon are emitted from the atoms. Furthermore, sudden change happens to the dynamics of entanglement.
5 pages, 4 figures
References in corpus (17)
- Finite-Time Disentanglement via Spontaneous Emission
- Quantum discord and the power of one qubit
- Necessary and sufficient condition for non-zero quantum discord
- Sudden Death of Entanglement
- Experimental quantum computing without entanglement
- Non-Markovian effects on the dynamics of entanglement
- Quantum Open System Theory: Bipartite Aspects
- Classical and quantum correlations under decoherence
- Protecting entanglement via the quantum Zeno effect
- On the role of entanglement and correlations in mixed-state quantum computation
- Stabilising entanglement by quantum jump-based feedback
- Controlling entanglement by direct quantum feedback
- The effect of dipole-dipole interaction for two atoms with different couplings in non-Markovian environment
- Preventing Multipartite Disentanglement by Local Modulations
- Parametrization of the feedback Hamiltonian realizing a pure steady state
- Quantum error correction may delay, but also cause, entanglement sudden death
- Quantum Zeno and anti-Zeno effects on quantum and classical correlations
Cited by in corpus (8)
- Robustness of quantum correlations against decoherence
- Correlation Dynamics of Qubit-Qutrit Systems in a Classical Dephasing Environment
- Enhancing parameter precision of optimal quantum estimation by direct quantum feedback
- On two-qubit states ordering with quantum discords
- Quantum discord under system-environment coupling: the two-qubit case
- Pre-management of Disentanglement
- Enhancing precision of damping rate by PT symmetric Hamiltonian
- The Geometric Structure of Quantum Resources for Bell-diagonal states