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arXiv quant-ph/0104046quant-ph
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广义量子测量

Generalized quantum measurement

Ting Yu, Ian C. Percival

摘要:

我们克服了贝尔对“量子测量”的一个反对意见,把这个定义推广到实验室以外的系统。根据这个定义,当经典变量的值受到量子系统早期状态的显著影响时,就发生了{ \sl广义量子测量}。如果经典运动是混沌的,那么在平衡系统中就可以进行广义量子测量。本文讨论了量子测量的这一经典方面,假设量子动力学和经典动力学之间的海森堡切割是在很小的尺度上进行的。为了简单起见,一个发生碰撞的气体可以用一个“阿诺德气体”来模拟。

英文摘要:

We overcome one of Bell's objections to `quantum measurement' by generalizing the definition to include systems outside the laboratory. According to this definition a {\sl generalized quantum measurement} takes place when the value of a classical variable is influenced significantly by an earlier state of a quantum system. A generalized quantum measurement can then take place in equilibrium systems, provided the classical motion is chaotic. This paper deals with this classical aspect of quantum measurement, assuming that the Heisenberg cut between the quantum dynamics and the classical dynamics is made at a very small scale. For simplicity, a gas with collisions is modelled by an `Arnold gas'.

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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