Entangled resource for interfacing single- and dual-rail optical qubits
Entangled resource for interfacing single- and dual-rail optical qubits
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DOI：
10.22331/q-2021-03-23-416
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发表时间：
2021-03-23
期刊：
影响因子：
6.4
通讯作者：
Lvovsky, A., I
中科院分区：
文献类型：
--
作者：
Drahi, David;Sychev, Demid, V;Lvovsky, A., I
目前，在光学量子比特中编码量子信息的最广泛使用的方法是双轨基础，通常通过单个光子的偏振来实现。另一方面，许多量子信息的固定载体（如原子）通过单轨编码与光耦合，其中量子比特以光子数编码。因此，为了实现内聚的量子网络，两种编码之间的相互转换是至关重要的。在本文中，我们通过在两种编码之间生成纠缠资源并使用它将双轨量子比特传送到其单轨对应物上来证明这一点。这项工作完成了一套必要的工具之间的相互转换的三个主要编码的量子位在光学领域：单轨，双轨和连续变量。
Today's most widely used method of encoding quantum information in optical qubits is the dual-rail basis, often carried out through the polarisation of a single photon. On the other hand, many stationary carriers of quantum information - such as atoms - couple to light via the single-rail encoding in which the qubit is encoded in the number of photons. As such, interconversion between the two encodings is paramount in order to achieve cohesive quantum networks. In this paper, we demonstrate this by generating an entangled resource between the two encodings and using it to teleport a dual-rail qubit onto its single-rail counterpart. This work completes the set of tools necessary for the interconversion between the three primary encodings of a qubit in the optical field: single-rail, dual-rail and continuous-variable.