Entanglement for excitons in two quantum dots in a cavity injected with squeezed vacuum
- Department of Physics, Huazhong Normal University, Wuhan 430079 (China)
- Department of Physics, Tongji University, Shanghai 200092 (China)
- Division of Physics and Astronomy, Vrije Universiteit Amsterdam, 1081 HV Amsterdam (Netherlands)
The dynamical behavior of entanglement for excitons in two quantum dots placed in a cavity driven by a broadband squeezed vacuum is studied in the low exciton density regime. It is found that the excitons in two quantum dots can evolve into a pure entangled state only when the dissipation of the cavity and exciton modes is negligible. When the injected field into the cavity is a squeezed vacuum, the excitons will be in a two-mode Gaussian entangled mixed state even in the long time limit. Analytical expressions are derived, showing the dependence of the entanglement property of the excitons in two quantum dots on the squeezing properties of the initial state prepared in the cavity and the strength of two-photon correlations of the squeezed vacuum injected into the cavity.
- OSTI ID:
- 20640654
- Journal Information:
- Physical Review. A, Vol. 69, Issue 1; Other Information: DOI: 10.1103/PhysRevA.69.014301; (c) 2004 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
- Country of Publication:
- United States
- Language:
- English
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