Frequency-encoded photonic qubits for scalable quantum information processing
Frequency-encoded photonic qubits for scalable quantum information processing
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DOI：
10.1364/optica.4.000008
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发表时间：
2017-01-20
期刊：
影响因子：
10.4
通讯作者：
Lougovski, Pavel
中科院分区：
文献类型：
--
作者：
Lukens, Joseph M.;Lougovski, Pavel
大规模量子计算的目标之一是量子互连：一种使用光子连接否则无法相互作用的量子位的设备。然而，当前的方法需要频率无法区分的光子——这对于经历不同局部环境或完全不同物理成分的系统来说是一个重大挑战。在这里，我们开发了一个全新的平台，实际上利用这种频率不匹配来处理量子信息。我们的协议被标记为“光谱线性光学量子计算”（光谱 LOQC），提供了有利的光学资源线性缩放，并享有前所未有的并行度，因为可以在同一线性光学设备中的多个 N 量子位组上并行执行任意 N 量子位量子门。光谱 LOQC 不仅为光互连提供了新的潜力，而且还将无处不在的高速光纤技术应用于光子量子信息，使波长可配置且强大的光量子系统触手可及。
Among the objectives for large-scale quantum computation is the quantum interconnect: a device that uses photons to interface qubits that otherwise could not interact. However, the current approaches require photons indistinguishable in frequency-a major challenge for systems experiencing different local environments or of different physical compositions altogether. Here, we develop an entirely new platform that actually exploits such frequency mismatch for processing quantum information. Labeled "spectral linear optical quantum computation" (spectral LOQC), our protocol offers favorable linear scaling of optical resources and enjoys an unprecedented degree of parallelism, as an arbitrary N-qubit quantum gate may be performed in parallel on multiple N-qubit sets in the same linear optical device. Not only does spectral LOQC offer new potential for optical interconnects, but it also brings the ubiquitous technology of high-speed fiber optics to bear on photonic quantum information, making wavelength-configurable and robust optical quantum systems within reach.