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Teleporting photonic qudits using multimode quantum scissors

机译:使用多模量子剪刀传送光子量子态

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摘要

Teleportation plays an important role in the communication of quantum information between the nodes of a quantum network and is viewed as an essential ingredient for long-distance Quantum Cryptography. We describe a method to teleport the quantum information carried by a photon in a superposition of a number d of light modes (a “qudit”) by the help of d additional photons based on transcription. A qudit encoded into a single excitation of d light modes (in our case Laguerre-Gauss modes which carry orbital angular momentum) is transcribed to d single-rail photonic qubits, which are spatially separated. Each single-rail qubit consists of a superposition of vacuum and a single photon in each one of the modes. After successful teleportation of each of the d single-rail qubits by means of “quantum scissors” they are converted back into a qudit carried by a single photon which completes the teleportation scheme.
机译:隐形传态在量子网络节点之间的量子信息通信中起着重要作用,并且被视为长距离量子密码学的重要组成部分。我们描述了一种方法,该方法借助基于转录的d个附加光子,将光子所携带的量子信息以一定数量的d个光模(“ qudit”)叠加传输。编码为d个光模(在我们的情况下为Laguerre-Gauss模,携带轨道角动量)的单激发的量子被转录为d个单轨光子量子位,它们在空间上是分开的。每个单轨量子位在每个模式中均由真空和单个光子的叠加组成。在通过“量子剪刀”成功地传送了d个单轨量子比特的每一个之后,它们被转换回由单个光子携带的qudit,从而完成了隐形传送方案。

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