Time-bin-to-polarization conversion of ultrafast photonic qubits
Time-bin-to-polarization conversion of ultrafast photonic qubits
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DOI：
10.1103/physreva.96.053812
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发表时间：
2017-08
影响因子：
2.9
通讯作者：
C. Kupchak;P. Bustard;K. Heshami;J. Erskine;M. Spanner;D. England;B. Sussman
中科院分区：
文献类型：
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作者：
C. Kupchak;P. Bustard;K. Heshami;J. Erskine;M. Spanner;D. England;B. Sussman
利用光子时间仓量子比特对量子信息进行编码，适合于长距离量子通信方案。在实践中，由于诸如检测器响应时间或共极化时间仓可以被切换的速度之类的技术约束，其他编码（例如极化）通常优选用于像状态检测这样的操作。在这里，我们提出了使用基于超快光学克尔快门的方法在偏振和时间仓编码之间进行量子比特转换，并在快门速度接近1 ps的情况下获得97%的效率和0.827+/-0.003的平均保真度。我们的演示描绘了混合和高速光量子网络的发展的基本要求。
The encoding of quantum information in photonic time-bin qubits is apt for long distance quantum communication schemes. In practice, due to technical constraints such as detector response time, or the speed with which co-polarized time-bins can be switched, other encodings, e.g. polarization, are often preferred for operations like state detection. Here, we present the conversion of qubits between polarization and time-bin encodings using a method that is based on an ultrafast optical Kerr shutter and attain efficiencies of 97% and an average fidelity of 0.827+/-0.003 with shutter speeds near 1 ps. Our demonstration delineates an essential requirement for the development of hybrid and high-rate optical quantum networks.