Dissipation of a two-mode squeezed vacuum state in the single-mode amplitude damping channel

作者：Zhou Nan-Run^*; Hu Li-Yun; Fan Hong-Yi

来源：Chinese Physics B, 2011, 20(12): 120301.

DOI：10.1088/1674-1056/20/12/120301

• amplitude dissipative channel
• two-mode squeezed vacuum state
• two-mode entangled state
• quantum communication

We explore how a two-mode squeezed vacuum state sech theta e(alpha dagger b dagger tahh theta) |00 > evolves when it undergoes a single-mode amplitude dissipative channel with rate of decay.. We find that in this process not only the squeezing parameter decreases, tanh theta -> e(-kappa t) tanh theta, but also the second-mode vacuum state evolves into a chaotic state exp{b dagger b ln[(1 - e(-2 kappa t)) tanh(2)theta]}. The outcome state is no more a pure state, but an entangled mixed state.

• 出版日期2011-12
• 单位江西师范大学; 南昌大学; 上海交通大学