Entanglement transfer via the Raman atom–cavity-field interaction

doi:10.1088/1674-1056/19/9/094206

中国物理B ›› 2010, Vol. 19 ›› Issue (9): 94206-094206.doi: 10.1088/1674-1056/19/9/094206

Entanglement transfer via the Raman atom–cavity-field interaction

梁麦林, 袁兵

Physics Department, School of Science, Tianjin University, Tianjin 300072, China

收稿日期:2010-01-11 修回日期:2010-03-15 出版日期:2010-09-15 发布日期:2010-09-15

Entanglement transfer via the Raman atom–cavity-field interaction

Liang Mai-Lin(梁麦林)^† and Yuan Bing(袁兵)

Physics Department, School of Science, Tianjin University, Tianjin 300072, China

Received:2010-01-11 Revised:2010-03-15 Online:2010-09-15 Published:2010-09-15

摘要/Abstract

摘要： For the Raman interaction between an atom and a two-mode cavity field prepared in the state |01> or |10>, the atom and the field can be disentangled periodically. Such a property of Raman atom--field interaction allows the full entanglement transfer among many atoms and bimodal cavities. In the calculations, each atom is assumed to interact with its own cavity at a different time and so non-identical atoms can be treated conveniently. Entanglement sudden death is discussed too. Though atom--field interaction greatly changes the values of the concurrence for two atoms, configuration of the concurrence is almost not affected. When there is entanglement sudden death, atoms and cavities can still be entangled with one another. However, full entanglement transfer cannot be achieved for such systems with Raman atom--field interaction.

Abstract: For the Raman interaction between an atom and a two-mode cavity field prepared in the state |01$\rangle$ or |10$\rangle$, the atom and the field can be disentangled periodically. Such a property of Raman atom–field interaction allows the full entanglement transfer among many atoms and bimodal cavities. In the calculations, each atom is assumed to interact with its own cavity at a different time and so non-identical atoms can be treated conveniently. Entanglement sudden death is discussed too. Though atom–field interaction greatly changes the values of the concurrence for two atoms, configuration of the concurrence is almost not affected. When there is entanglement sudden death, atoms and cavities can still be entangled with one another. However, full entanglement transfer cannot be achieved for such systems with Raman atom–field interaction.

Key words: quantum information, entanglement, entanglement transfer, atom

中图分类号:

4250

梁麦林, 袁兵. Entanglement transfer via the Raman atom–cavity-field interaction[J]. 中国物理B, 2010, 19(9): 94206-094206.

Liang Mai-Lin(梁麦林) and Yuan Bing(袁兵). Entanglement transfer via the Raman atom–cavity-field interaction[J]. Chin. Phys. B, 2010, 19(9): 94206-094206.

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Entanglement transfer via the Raman atom–cavity-field interaction

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