中国物理B ›› 2002, Vol. 11 ›› Issue (4): 339-345.doi: 10.1088/1009-1963/11/4/306
• CLASSICAL AREAS OF PHENOMENOLOGY • 上一篇 下一篇
刘金明, 李剑, 郭光灿
Liu Jin-Ming (刘金明), Li Jian (李剑), Guo Guang-Can (郭光灿)
摘要: With the application of a Wigner function description of a two-mode squeezed state, we study a protocol of continuous variable entanglement swapping in a noisy quantum channel. Assuming that the two initial entangled states are coupled with the same environment, we analyse the quantum state emerging from the swapping and obtain the inseparable condition for the output correlation. It is found that there is more noise resulting from the entanglement swapping than from the direct transmission, no matter what values of displacement gain are chosen.
中图分类号: (Quantum state engineering and measurements)