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arXiv 1302.2806quant-ph
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N自旋系统的塌缩、复活和猫态

Collapse and Revival and Cat States with an N Spin System

Shane Dooley, Francis McCrossan, Derek Harland, Mark J. Everitt, Timothy P. Spiller

摘要:

我们讨论了拉比振荡的崩溃和复苏的系统,包括一个量子位和一个“大自旋”(由N量子位,或自旋1/2粒子)。我们展示了一个制度的行为类似于传统的崩溃和复活的量子位场系统,采用自旋相干态的初始状态的大自旋。这些动力学可以用来创造一个“薛定谔猫”状态的大自旋。即使对于相对小的N值,也可以产生具有量子精密测量应用的显著潜力的状态,从而给出接近海森堡极限的灵敏度。

英文摘要:

We discuss collapse and revival of Rabi oscillations in a system comprising a qubit and a "big spin" (made of N qubits, or spin-1/2 particles). We demonstrate a regime of behaviour analogous to conventional collapse and revival for a qubit-field system, employing spin coherent states for the initial state of the big spin. These dynamics can be used to create a "Schrodinger cat" state of the big spin. Even for relatively small values of N, states with significant potential for quantum metrology applications can result, giving sensitivity approaching the Heisenberg limit.

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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