Sudden Death and Birth of Entanglement Effects for Kerr-Nonlinear Coupler

Abstract

We analyse the entanglement dynamics in a nonlinear Kerr-like coupler interacting with external environment. Whenever the reservoir is in a thermal vacuum state the entanglement (measured by concurrence for a two-qubit system) exhibits regular oscillations of decreasing amplitude. In contrast, for thermal reservoirs we can observe dark periods in concurrence oscillations (which can be called a "sudden death" of the entanglement) and the entanglement rebuild (which can be named the "sudden birth" of entanglement). We show that these features can be observed when we deal with 2-qubit system as well as $2\otimes 3$ system.

18 pages including 7 figures. Journal of the Optical Society of America B - in press

References in corpus (7)

• Finite-Time Disentanglement via Spontaneous Emission
• Dark periods and revivals of entanglement in a two qubit system
• Dynamics of the entanglement between two oscillators in the same environment
• Delayed (sudden) birth of entanglement
• Entanglement and purity of two-mode Gaussian states in noisy channels
• Entanglement oscillations in non-Markovian quantum channels
• Entangling oscillators through environment noise

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• Squeezed vacuum reservoir effect for entanglement decay in nonlinear quantum scissors system
• Quantum entanglement and disentanglement of multi-atom systems
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• Nonlinear coupler operating on Werner-like states - entanglement creation, its enhancement and preservation