Unruh effect in quantum information beyond the single-mode approximation
Unruh effect in quantum information beyond the single-mode approximation
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DOI：
10.1103/physreva.82.042332
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发表时间：
2010-10-26
影响因子：
2.9
通讯作者：
Fuentes, Ivette
中科院分区：
文献类型：
--
作者：
Bruschi, David E.;Louko, Jorma;Fuentes, Ivette
我们解决的有效性的单模近似，通常调用的纠缠在非惯性系和其他相对论量子信息的情况下的分析。我们发现，单模近似是不适用于任意状态，发现更正以前的研究超出了这种近似的玻色子和费米子的情况下。我们还展示了一类波包，其中的单模近似是合理的峰值约束设置一个适当的傅立叶变换。
We address the validity of the single-mode approximation that is commonly invoked in the analysis of entanglement in noninertial frames and in other relativistic quantum-information scenarios. We show that the single-mode approximation is not valid for arbitrary states, finding corrections to previous studies beyond such approximations in the bosonic and fermionic cases. We also exhibit a class of wave packets for which the single-mode approximation is justified subject to the peaking constraints set by an appropriate Fourier transform.