Wigner phase-space distribution as a wave function

Wigner phase-space distribution as a wave function
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DOI:
10.1103/physreva.88.052108
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发表时间:
2013-11-11
期刊:
影响因子:
2.9
通讯作者:
Rabitz, Herschel A.
Rabitz, Herschel A.
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Bondar, Denys I.;Cabrera, Renan;Rabitz, Herschel A.

文献摘要

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我们证明了纯量子态的Wigner函数是一个特殊调谐的Dirac bra-ket形式的波函数,并论证了Wigner函数实际上是量子粒子在经典相空间某一点的概率振幅。此外,我们建立,在经典极限,维格纳函数转换成一个经典的Koopman-von Neumann波函数,而不是一个经典的概率分布。由于概率振幅不一定是正的,我们的研究结果提供了一个替代的维格纳函数的消极前景。
We demonstrate that the Wigner function of a pure quantum state is a wave function in a specially tuned Dirac bra-ket formalism and argue that the Wigner function is in fact a probability amplitude for the quantum particle to be at a certain point of the classical phase space. Additionally, we establish that in the classical limit, the Wigner function transforms into a classical Koopman-von Neumann wave function rather than into a classical probability distribution. Since probability amplitude need not be positive, our findings provide an alternative outlook on the Wigner function's negativity.