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Demonstration of unconditional one-way quantum computations for continuous variables

Demonstration of unconditional one-way quantum computations for continuous variables
Demonstration of unconditional one-way quantum computations for continuous variables
Quantum computing promises to exploit the laws of quantum mechanics for processing information in ways fundamentally different from today's classical computers, leading to unprecedented efficiency. One-way quantum computation, sometimes referred to as the cluster model of quantum computation, is a very promising approach to fulfil the capabilities of quantum information processing. The cluster model is realizable through measurements on a highly entangled cluster state with no need for controlled unitary evolutions. Here we demonstrate unconditional one-way quantum computation experiments for continuous variables using a linear cluster state of four entangled optical modes. We implement an important set of quantum operations, linear transformations, in the optical phase space through one-way computation. Though not sufficient, these are necessary for universal quantum computation over continuous variables, and in our scheme, in principle, any such linear transformation can be unconditionally and deterministically applied to arbitrary single-mode quantum states.
240504
Ukai, Ryuji
166c3f91-3e9d-4119-bb0c-3517197ad855
Iwata, Noriaki
750377b6-9934-4a48-85ed-554e340e0f67
Shimokawa, Yuji
208bb836-5aba-45b8-af99-0b7a741dfca0
Armstrong, Seiji C.
b70294b6-f762-4bb0-8abc-5e263cf304b7
Politi, Alberto
cf75c0a8-d34d-4cbe-b9d5-e408c0edeeec
Yoshikawa, Jun-ichi
d8561f4f-2af2-413c-9868-c2ca42ed876c
van Loock, Peter
a006b07f-ec67-4fed-ad92-b8431e1ceb17
Furusawa, Akira
964f291b-c465-4cec-a2e9-55cf07fea7fa
Ukai, Ryuji
166c3f91-3e9d-4119-bb0c-3517197ad855
Iwata, Noriaki
750377b6-9934-4a48-85ed-554e340e0f67
Shimokawa, Yuji
208bb836-5aba-45b8-af99-0b7a741dfca0
Armstrong, Seiji C.
b70294b6-f762-4bb0-8abc-5e263cf304b7
Politi, Alberto
cf75c0a8-d34d-4cbe-b9d5-e408c0edeeec
Yoshikawa, Jun-ichi
d8561f4f-2af2-413c-9868-c2ca42ed876c
van Loock, Peter
a006b07f-ec67-4fed-ad92-b8431e1ceb17
Furusawa, Akira
964f291b-c465-4cec-a2e9-55cf07fea7fa

Ukai, Ryuji, Iwata, Noriaki, Shimokawa, Yuji, Armstrong, Seiji C., Politi, Alberto, Yoshikawa, Jun-ichi, van Loock, Peter and Furusawa, Akira (2011) Demonstration of unconditional one-way quantum computations for continuous variables. Physical Review Letters, 106 (24), 240504. (doi:10.1103/PhysRevLett.106.240504).

Record type: Article

Abstract

Quantum computing promises to exploit the laws of quantum mechanics for processing information in ways fundamentally different from today's classical computers, leading to unprecedented efficiency. One-way quantum computation, sometimes referred to as the cluster model of quantum computation, is a very promising approach to fulfil the capabilities of quantum information processing. The cluster model is realizable through measurements on a highly entangled cluster state with no need for controlled unitary evolutions. Here we demonstrate unconditional one-way quantum computation experiments for continuous variables using a linear cluster state of four entangled optical modes. We implement an important set of quantum operations, linear transformations, in the optical phase space through one-way computation. Though not sufficient, these are necessary for universal quantum computation over continuous variables, and in our scheme, in principle, any such linear transformation can be unconditionally and deterministically applied to arbitrary single-mode quantum states.

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More information

Published date: 17 June 2011
Organisations: Quantum, Light & Matter Group

Identifiers

Local EPrints ID: 377128
URI: http://eprints.soton.ac.uk/id/eprint/377128
PURE UUID: d246ffa5-4ec4-4813-afe3-0f21eb88f22f
ORCID for Alberto Politi: ORCID iD orcid.org/0000-0002-3668-9474

Catalogue record

Date deposited: 26 May 2015 10:48
Last modified: 10 Dec 2019 01:34

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Contributors

Author: Ryuji Ukai
Author: Noriaki Iwata
Author: Yuji Shimokawa
Author: Seiji C. Armstrong
Author: Alberto Politi ORCID iD
Author: Jun-ichi Yoshikawa
Author: Peter van Loock
Author: Akira Furusawa

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