Analysis of optical quantum state preparation using photon detectors in the finite-temporal-resolution regime
Analysis of optical quantum state preparation using photon detectors in the finite-temporal-resolution regime
复制标题
在有限时间分辨率范围内使用光子探测器分析光学量子态制备
DOI：
10.1103/physreva.105.043714
复制
发表时间：
2022
影响因子：
2.9
通讯作者：
Furusawa Akira
中科院分区：
文献类型：
--
作者：
Sonoyama Tatsuki;Asavanant Warit;Fukui Kosuke;Endo Mamoru;Yoshikawa Jun-ichi;Furusawa Akira
量子态制备是量子信息处理的重要内容。特别是在连续变量的光量子计算中，需要非高斯态来进行普适运算和纠错。光学非高斯态通常通过使用光子探测器的先驱方案产生。在以前的实验中，光子探测器的时间分辨率相对于量子态的时间宽度足够高，因此传统的非高斯态制备理论将探测器的时间分辨率视为可忽略不计。然而，当使用各种光子探测器时，包括光子数分辨探测器，时间分辨率是不可忽略的。本文将传统的光子探测器制备量子态的理论推广到有限时间分辨率的情况，并以单光子和双光子制备为例进行了分析，发现所产生的量子态可用无量纲参数表征，该参数定义为探测器的时间分辨率与光源带宽的乘积。基于这些结果，需要保持所产生的量子态的高纯度和保真度。
Quantum state preparation is important for quantum information processing. In particular, in optical quantum computing with continuous variables, non-Gaussian states are needed for universal operation and error correction. Optical non-Gaussian states are usually generated by heralding schemes using photon detectors. In previous experiments, the temporal resolution of the photon detectors was sufficiently high relative to the time width of the quantum state, so that the conventional theory of non-Gaussian state preparation treated the detector's temporal resolution as negligible. However, when using various photon detectors, including photon-number-resolving detectors, the temporal resolution is non-negligible. In this paper, we extend the conventional theory of quantum state preparation using photon detectors to the finite-temporal-resolution regime, analyze the cases of single-photon and two-photon preparation as examples, and find that the generated states are characterized by the dimensionless parameter, defined as the product of the temporal resolution of the detectorsand the bandwidth of the light source. Based on the results,is required to keep the purity and fidelity of the generated quantum states high.
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DOI：
10.1063/1.4962732
发表时间：
2016-09
期刊：
--
影响因子：
--
作者：
J. Yoshikawa;S. Yokoyama;S. Yokoyama;T. Kaji;C. Sornphiphatphong;Y. Shiozawa;Kenzo Makino;A. Furusawa
通讯作者：
J. Yoshikawa;S. Yokoyama;S. Yokoyama;T. Kaji;C. Sornphiphatphong;Y. Shiozawa;Kenzo Makino;A. Furusawa
影响因子：
19.6
作者：
Larsen, Mikkel V.;Guo, Xueshi;Andersen, Ulrik L.
通讯作者：
Andersen, Ulrik L.
影响因子：
2.9
作者：
K. Mølmer
通讯作者：
K. Mølmer
光子减去由周期性极化的 KTiOPO_4 生成的压缩态
DOI：
--
发表时间：
2007
期刊：
Optics Express 15
影响因子：
--
作者：
K. Wakui;H. Takahashi;A. Furusawa;and M. Sasaki
通讯作者：
and M. Sasaki
影响因子：
10.4
作者：
Cahall, Clinton;Nicolich, Kathryn L.;Kim, Jungsang
通讯作者：
Kim, Jungsang