使用多模量子剪刀实现光子量子比特的隐形传态。

Teleporting photonic qudits using multimode quantum scissors.

机构信息

School of Chemistry and Physics, University of KwaZulu-Natal, Private Bag X54001, Durban 4000, South Africa.

1] School of Chemistry and Physics, University of KwaZulu-Natal, Private Bag X54001, Durban 4000, South Africa [2] National Institute of Theoretical Physics (NITheP), University of KwaZulu-Natal, Private Bag X54001, Durban 4000, South Africa.

出版信息

Sci Rep. 2013 Dec 19;3:3548. doi: 10.1038/srep03548.

DOI:10.1038/srep03548

PMID:24352610

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6506454/

Abstract

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.

摘要

瞬移在量子网络节点之间的量子信息通信中扮演着重要的角色，被视为长距离量子密码学的必要组成部分。我们描述了一种通过辅助的 d 个额外光子来实现对由 d 个光模式（“qudit”）叠加而成的光子所携带的量子信息进行瞬移的方法，该方法基于转录。通过转录，将一个编码在 d 个光模式的单激发态（在我们的情况下是具有轨道角动量的拉盖尔-高斯模式）中的 qudit 转换为 d 个单轨光子量子位，它们在空间上是分离的。每个单轨量子位由真空和每个模式中的单个光子的叠加组成。通过“量子剪刀”成功地对每个单轨量子位进行瞬移后，它们被转换回由单个光子携带的 qudit，完成了瞬移方案。