Entanglement and disentanglement from cascade beam-splitter for squeezed vacuum state inputs

• 来源期刊: 中国物理（英文版）
• 关键词: entanglement disentanglement cascade beam-splitter squeezed vacuum states
• 年，卷（期）: 2004,（11）
• 页码范围: 1881-1886
• 页数: 6页
• 语种: 英文

摘要

Properties of the entanglement at the outputs of a cascade beam-splitter are investigated for two single-mode squeezed vacuum state inputs. It is shown that the entanglement depends on the squeezing amplitudes of the input states and the reflection coefficients of the cascade beam-splitter, and the composite phase shift A between the cascade beam-splitter and the input fields has a great effect on the entanglement. In particular, the properties of the entanglement of a cascade beam-splitter differ from those of only one beam-splitter. A further method for manipulating entanglement by adjusting the paraneters of the cascade beam-splitter and the input fields is proposed.