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arXiv quant-ph/0207030quant-ph
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量子Zeno子空间与动力学超选择定则

Quantum Zeno subspaces and dynamical superselection rules

P. Facchi, S. Pascazio

摘要:

量子系统的量子芝诺演化发生在全希尔伯特空间的一个固有子空间中。“芝诺子空间”的物理和数学特征取决于测量仪器:当这被包括在量子描述中时,芝诺效应就变成了动力学的一个纯粹的结果,而且值得注意的是,可以用绝热定理和动力学超选择规则来描述。我们看几个例子,并专注于量子计算和消相干自由子空间。

英文摘要:

The quantum Zeno evolution of a quantum system takes place in a proper subspace of the total Hilbert space. The physical and mathematical features of the "Zeno subspaces" depend on the measuring apparatus: when this is included in the quantum description, the Zeno effect becomes a mere consequence of the dynamics and, remarkably, can be cast in terms of an adiabatic theorem, with a dynamical superselection rule. We look at several examples and focus on quantum computation and decoherence-free subspaces.

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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