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arXiv quant-ph/0504135quant-ph
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外驱动腔中光场的量子无规行走

Quantum random walk of the field in an externally driven cavity

G S Agarwal, P K Pathak

摘要:

利用高质量腔中原子与场之间的共振相互作用,我们展示了如何实现Aharonov等人[Phys. Rev. A { \bf 48},1687(1993)]提出的量子随机行走。原子受到经典场的强烈驱动。在强驱动条件下,利用二能级原子的自旋算符和场算符,可以实现$ iS^{x}(a-a^†)$形式的有效相互作用。这种有效的相互作用产生的位移场的波函数取决于状态的二能级原子。测量二能级原子的态将产生场的有效态。使用零差技术,可以监测量子随机游走器的状态。

英文摘要:

Using resonant interaction between atoms and the field in a high quality cavity, we show how to realize quantum random walks as proposed by Aharonov et al [Phys. Rev. A {\bf48}, 1687 (1993)]. The atoms are driven strongly by a classical field. Under conditions of strong driving we could realize an effective interaction of the form $ iS^{x}(a-a^†)$ in terms of the spin operator associated with the two level atom and the field operators. This effective interaction generates displacement in the field's wavefunction depending on the state of the two level atom. Measurements of the state of the two level atom would then generate effective state of the field. Using a homodyne technique, the state of the quantum random walker can be monitored.

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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