Entanglement dynamics of qubits in a common environment

Jun-Hong An, Shun-Jin Wang and Hong-Gang Luo

Physica A: Statistical Mechanics and its Applications, 2007, vol. 382, issue 2, 753-764

Abstract: We use the quantum jump approach to study the entanglement dynamics of a quantum register, which is composed of two or three dipole–dipole coupled two-level atoms, interacting with a common environment. Our investigation of entanglement dynamics reflects that the environment has dual actions on the entanglement of the qubits in the model. While the environment destroys the entanglement induced by the coherent dipole–dipole interactions, it can produce stable entanglement between the qubits prepared initially in a separable state. The analysis shows that it is the entangled decoherence-free states contained as components in the initial state that contribute to the stable entanglement. Our study indicates how the environmental noise produces the entanglement and exposes the interplay of environmental noise and coherent interactions of qubits on the entanglement.

Keywords: Quantum jump approach; Master equation; Entanglement dynamics (search for similar items in EconPapers)
Date: 2007
References: View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:382:y:2007:i:2:p:753-764

DOI: 10.1016/j.physa.2007.04.008

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