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arXiv 2208.03250quant-ph
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光子部分可区分性在量子光学电路模拟中的实现

Implementation of photon partial distinguishability in a quantum optical circuit simulation

Javier Osca, Jiri Vala

AI总结:

本文提出一种基于 Gram-Schmidt 正交归一化的模拟实现方法,通过扩展光子信道纳入波包自由度,在现有理想量子电路模拟器中表示光子部分可区分性。

摘要:

我们关注的是在某些现实条件下对量子光学电路进行数值模拟,具体而言,即光子量子态并非完全不可区分的情形。光子的部分可区分性对光学量子信息处理的实现构成了严重限制。为了恰当评估其对量子信息协议的影响,必须进行能够紧密模拟量子电路运行的精确数值模拟。我们的具体目标是提供一种光子部分可区分性的计算机实现,该实现原则上可适用于用于理想量子电路的现有模拟技术,并避免对这些技术进行重大修改。我们的方法基于 Gram-Schmidt 正交归一化过程,该过程非常适合我们的目的。光子量子态由包含其时间和频率分布信息的波包表示。为了考虑光子的部分可区分性,我们扩展了与电路运行相关的自由度数量,通过扩展光子信道的定义以纳入波包自由度。该策略允许将延迟操作与线性光学元件置于同等地位进行定义。

英文摘要:

We are concerned with numerical simulations of quantum optical circuits under certain realistic conditions, specifically that photon quantum states are not perfectly indistinguishable. The partial photon distinguishability presents a serious limitation in implementation of optical quantum information processing. In order to properly assess its effect on quantum information protocols, accurate numerical simulations, which closely emulate quantum circuit operations, are essential. Our specific objective is to provide a computer implementation of the partial photon distinguishability which is in principle applicable to existing simulation techniques used for ideal quantum circuits and which avoids a need for their significant modification. Our approach is based on the Gram-Schmidt orthonormalization process, which is well suited for our purpose. Photonic quantum states are represented by wavepackets which contain information on their time and frequency distributions. In order to account for the partial photon distinguishability, we expand the number of degrees of freedom associated with the circuit operation extending the definition of the photon channels to incorporate wavepacket degrees of freedom. This strategy allows to define delay operations in the same footing as the linear optical elements.

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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