Entanglement evolution for excitons of two separate quantum dots in a cavity driven by magnetic field

Details Entanglement evolution for excitons of two separate quantum dots in a cavity driven by magnetic field Entanglement evolution for excitons of two separate quantum dots in a cavity driven by magnetic field

2006-11-28

arxiv.org/abs/quant-ph/0611266v1

Physics

Quantum Physics

12 pages, 16 figures

Scientific paper

The time evolution of entanglement for excitons in two quantum dots embedded in a single mode cavity is studied in a ``spin-boson'' regime. It is found that although with the dissipation from the boson mode, the excitons in the two quantum dots can be entangled by only modulating their energy bias $\epsilon$ under the influence of external driving magnetic field. Initially, the two excitons are prepared in a pure separate state. When the time-dependent magnetic field is switched on, a highly entangled state is produced and maintained even in a very long time interval. The mechanism may be used to control the quantum devices in practical applications.

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