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Quantum teleportation of multiple degrees of freedom of a single photon

Quantum teleportation (1) provides a 'disembodied' way to transfer quantum states from one object to another at a distant location, assisted by previously shared entangled states and a classical communication channel. As well as being of fundamental interest, teleportation has been recognized as an... Full description

Journal Title: Nature 2015, Vol.518(7540), p.516
Main Author: Xi-Lin Wang
Other Authors: Xin-Dong Cai , Zu-En Su , Ming-Cheng Chen , Dian Wu , Li Li , Nai-Le Liu , Chao-Yang Lu , Jian-Wei Pan
Format: Electronic Article Electronic Article
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ID: ISSN: 0028-0836 ; E-ISSN: 1476-4687 ; DOI: 10.1038/nature14246
Link: http://dx.doi.org/10.1038/nature14246
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recordid: nature_a10.1038/nature14246
title: Quantum teleportation of multiple degrees of freedom of a single photon
format: Article
creator:
  • Xi-Lin Wang
  • Xin-Dong Cai
  • Zu-En Su
  • Ming-Cheng Chen
  • Dian Wu
  • Li Li
  • Nai-Le Liu
  • Chao-Yang Lu
  • Jian-Wei Pan
subjects:
  • Quantum Teleportation -- Research
  • Photons -- Observations
  • Physics Research
ispartof: Nature, 2015, Vol.518(7540), p.516
description: Quantum teleportation (1) provides a 'disembodied' way to transfer quantum states from one object to another at a distant location, assisted by previously shared entangled states and a classical communication channel. As well as being of fundamental interest, teleportation has been recognized as an important element in long-distance quantum communication (2), distributed quantum networks (3) and measurement-based quantum computation (4, 5). There have been numerous demonstrations of teleportation in different physical systems such as photons (6-8), atoms (9), ions (10, 11), electrons (12) and superconducting circuits (13). All the previous experiments were limited to the teleportation of one degree of freedom only. However, a single quantum particle can naturally possess various degrees of freedom--internal and external--and with coherent coupling among them. A fundamental open challenge is to teleport multiple degrees of freedom simultaneously, which is necessary to describe a quantum particle fully and, therefore, to teleport it intact. Here we demonstrate quantum teleportation of the composite quantum states of a single photon encoded in both spin and orbital angular momentum. We use photon pairs entangled in both degrees of freedom (that is, hyper-entangled) as the quantum channel for teleportation, and develop a method to project and discriminate hyper-entangled Bell states by exploiting probabilistic quantum non-demolition measurement, which can be extended to more degrees of freedom. We verify the teleportation for both spin-orbit product states and hybrid entangled states, and achieve a teleportation fidelity ranging from 0.57 to 0.68, above the classical limit. Our work is a step towards the teleportation of more complex quantum systems, and demonstrates an increase in our technical control of scalable quantum technologies.
language:
source:
identifier: ISSN: 0028-0836 ; E-ISSN: 1476-4687 ; DOI: 10.1038/nature14246
fulltext: fulltext
issn:
  • 0028-0836
  • 00280836
  • 1476-4687
  • 14764687
url: Link


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titleQuantum teleportation of multiple degrees of freedom of a single photon
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descriptionQuantum teleportation (1) provides a 'disembodied' way to transfer quantum states from one object to another at a distant location, assisted by previously shared entangled states and a classical communication channel. As well as being of fundamental interest, teleportation has been recognized as an important element in long-distance quantum communication (2), distributed quantum networks (3) and measurement-based quantum computation (4, 5). There have been numerous demonstrations of teleportation in different physical systems such as photons (6-8), atoms (9), ions (10, 11), electrons (12) and superconducting circuits (13). All the previous experiments were limited to the teleportation of one degree of freedom only. However, a single quantum particle can naturally possess various degrees of freedom--internal and external--and with coherent coupling among them. A fundamental open challenge is to teleport multiple degrees of freedom simultaneously, which is necessary to describe a quantum particle fully and, therefore, to teleport it intact. Here we demonstrate quantum teleportation of the composite quantum states of a single photon encoded in both spin and orbital angular momentum. We use photon pairs entangled in both degrees of freedom (that is, hyper-entangled) as the quantum channel for teleportation, and develop a method to project and discriminate hyper-entangled Bell states by exploiting probabilistic quantum non-demolition measurement, which can be extended to more degrees of freedom. We verify the teleportation for both spin-orbit product states and hybrid entangled states, and achieve a teleportation fidelity ranging from 0.57 to 0.68, above the classical limit. Our work is a step towards the teleportation of more complex quantum systems, and demonstrates an increase in our technical control of scalable quantum technologies.
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