摘要
利用多模压缩态理论研究了由多模复共轭相干态、多模复共轭虚相干态和多模真空态的线性叠加所组成的三态叠 加多模薛定谔猫态纠缠光场的广义非线性不等幂次高次差压缩特性。结果发现:①真空场对此猫态光场的不等幂次高次差压缩效应没有影响;②在一定条件下,此猫态光场的两个正交相位分量可分别呈现出不等幂次高次差压缩效应;③而在另外的条件下,此猫态光场的两个正交相位分量则可同时出现上述的不等幂次高次差压缩效应,这是一种与测不准关系相悖的现象,称此种现象为"双边差压缩"效应。
By utilizing the general theory of multimode squeezed states, the effects of generalized nonlinear unequal-power higher-power difference squeezing in the multimode Schrodinger-cat state entangled light field is studied, that is formed by the linear superposition of three macroscopical distinguishable quantum states named the multimode complex conjugate coherent state, multimode complex conjugate imaginary coherent state and multimode vacuum state. It is found that 1) the difference squeezing of the cat state entangled light field is independent of its vacuum state component; 2) in some cases, the two quadrature phase components of this cat state entangled light field present unequal-power higher-power difference squeezing properties respectively ; 3) under some other conditions, the difference squeezing effects of two quadrature phase components of the state mentioned above can exist at the same time. The two preceding results stated above are in conformity with the uncertainty principle, but the last is not. It is called 'two-sided difference squeezing' phenomenon and could be very useful in the application of squeezed light on light quanta communication.
出处
《原子与分子物理学报》
CAS
CSCD
北大核心
2004年第4期540-548,共9页
Journal of Atomic and Molecular Physics
基金
ThisworkwassupponedbytheNaturalScienceFoundationofShaanxiProvince(No.2001SL04)theScienceandTechnologyKeyTaskFoundationItemofShaanxiProvince(No.2002K054G9.)
关键词
量子光学
多模纠缠态
三态叠加
多模压缩态
多模薛定谔猫态
不等幂次高次差压缩
测不准关系
<Keyword>Quantum optics
Multimode entangled states
Three states superposition
Multimode squeezed state
Multimode Schodinger-cat state light field
Unequal-power difference squeezing
Uncertainty principle
