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arXiv quant-ph/0202092quant-ph
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vonNeumann格上的熵及其计算

Entropy on the von Neumann lattice and its evaluation

Sumiyoshi Abe, J. Zak

摘要:

基于最近引入的相空间平均过程,在冯诺依曼格上定义了一种新的熵。这个量可以被解释为与在相空间的离散子集中的位置和动量可观测量的同时测量相关联的不确定性的度量。对于一类相干态的评价表明,这种熵取基态的一个定常值,模在这样的一类晶格的一个单位细胞。基态的这个值取决于位置晶格间距和动量晶格间距的比率。它被发现,它的最小值是实现了完美的正方形晶格,即,没有挤压。对这个最小值进行数值计算,得到1.386......

英文摘要:

Based on the recently introduced averaging procedure in phase space, a new type of entropy is defined on the von Neumann lattice. This quantity can be interpreted as a measure of uncertainty associated with simultaneous measurement of the position and momentum observables in the discrete subset of the phase space. Evaluating for a class of the coherent states, it is shown that this entropy takes a stationary value for the ground state, modulo a unit cell of the lattice in such a class. This value for the ground state depends on the ratio of the position lattice spacing and the momentum lattice spacing. It is found that its minimum is realized for the perfect square lattice, i.e., absence of squeezing. Numerical evaluation of this minimum gives 1.386....

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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