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物理学报  2004 

The uncertainty relations and squeezing effects for mixed states
混合态的不确定关系与压缩效应

Keywords: mixed state,minimum uncertainty,squeezing effect
混合态
,最小不确定性,压缩效应

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Abstract:

Based upon the Heisenberger's uncertainty relations for mixed states, the minimum uncertainty and squeezing effects are studies. Although all minimum uncertainty states must be pure states, the nucertainty of one dynamical variable can be squeezed in some pure states or mixed states, even if they are not minimum uncertainty states for the pair of dynamical variables. In addition, we present the general uncertainty relation of statistics, which has the similar mathmatical structure of Heisenberg's indeterminacy principle, but has no relation with quantum interfernce.

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