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arXiv quant-ph/9803082quant-ph
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希尔伯特空间几何与量子芝诺效应

Geometry of the Hilbert space and the Quantum Zeno Effect

A. K. Pati, S. V. Lawande

摘要:

证明了跃迁几率的二次短时行为是量子系统希尔伯特空间的内积的自然结果。我们证明了两次连续测量之间的薛定谔时间演化不是预言量子芝诺效应的必要条件,而只是充分条件。我们提供的生存概率和基本的几何结构,如Fubini-Study度量定义的投影希尔伯特空间的量子系统之间的关系。这预测了量子芝诺效应,即使是由非线性和非幺正演化方程描述的系统,在测量过程中的波函数的崩溃机制。研究了两个例子,一个是非线性薛定谔方程,另一个是吉辛方程,表明对于这些方程描述的系统可以观察到量子芝诺效应。

英文摘要:

We show that the quadratic short time behaviour of transition probability is a natural consequence of the inner product of the Hilbert space of the quantum system. We prove that Schrödinger time evolution between two successive measurements is not a necessary but only a sufficient condition for predicting quantum Zeno effect. We provide a relation between the survival probability and the underlying geometric structure such as the Fubini-Study metric defined on the projective Hilbert space of the quantum system. This predicts the quantum Zeno effect even for systems described by non-linear and non-unitary evolution equations, within the collapse mechanism of the wavefunction during measurement process. Two examples are studied, one is non-linear Schrödinger equation and other is Gisin's equation and it is shown that one can observe quantum Zeno effect for systems described by these equations.

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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