Non-Gaussian and Gottesman–Kitaev–Preskill state preparation by photon catalysis
Non-Gaussian and Gottesman–Kitaev–Preskill state preparation by photon catalysis
复制标题
通过光子催化制备非高斯和 Gottesman—Kitaev—Preskill 态
DOI：
10.1088/1367-2630/ab5330
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发表时间：
2019
影响因子：
3.3
通讯作者：
Pfister, Olivier
中科院分区：
文献类型：
--
作者：
Eaton, Miller;Nehra, Rajveer;Pfister, Olivier
连续变量量子计算是迄今为止最具可扩展性的QC实现，但需要非高斯资源来允许指数加速和量子校正，使用Gottesman-Kitaev-Preskill （GKP）状态等错误编码。然而，GKP国家的产生仍然是一个实验性的挑战。我们从理论上证明了光子催化，相干态与单光子态的干涉，以及光子数分辨探测，是非高斯量子态工程的有力推手，如精确位移的单光子态和压缩真空（SSV）的M对称叠加，包括压缩猫态（M= 2）。通过包括基于光子计数的状态育种，我们证明了扩大SSV状态和产生GKP状态的潜力。
Continuous-variable quantum-computing is the most scalable implementation of QC to date but requires non-Gaussian resources to allow exponential speedup and quantum correction, using error encoding such as Gottesman–Kitaev–Preskill (GKP) states. However, GKP state generation is still an experimental challenge. We show theoretically that photon catalysis, the interference of coherent states with single-photon states followed by photon-number-resolved detection, is a powerful enabler for non-Gaussian quantum state engineering such as exactly displaced single-photon states andM-symmetric superpositions of squeezed vacuum (SSV), including squeezed cat states (M= 2). By including photon-counting based state breeding, we demonstrate the potential to enlarge SSV states and produce GKP states.