Identifying phases of quantum many-body systems that are universal for quantum computation

Doherty, Andrew C. and Bartlett, Stephen D. (2009) Identifying phases of quantum many-body systems that are universal for quantum computation. Physical Review Letters, 103 2: 020506.1-020506.4. doi:10.1103/PhysRevLett.103.020506

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Author Doherty, Andrew C.
Bartlett, Stephen D.
Title Identifying phases of quantum many-body systems that are universal for quantum computation
Journal name Physical Review Letters   Check publisher's open access policy
ISSN 0031-9007
1079-7114
Publication date 2009-07-10
Sub-type Article (original research)
DOI 10.1103/PhysRevLett.103.020506
Open Access Status File (Publisher version)
Volume 103
Issue 2
Start page 020506.1
End page 020506.4
Total pages 4
Editor George Basbas
Jack Sandweiss
Reinhardt B. Schuhmann
Stanley G. Brown
Place of publication College Park, MD, United States
Publisher American Physical Society
Collection year 2010
Language eng
Subject C1
970102 Expanding Knowledge in the Physical Sciences
020603 Quantum Information, Computation and Communication
Abstract Quantum computation can proceed solely through single-qubit measurements on an appropriate quantum state, such as the ground state of an interacting many-body system. We investigate a simple spin-lattice system based on the cluster-state model, and by using nonlocal correlation functions that quantify the fidelity of quantum gates performed between distant qubits, we demonstrate that it possesses a quantum (zero-temperature) phase transition between a disordered phase and an ordered “cluster phase” in which it is possible to perform a universal set of quantum gates.
Keyword Computer
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Article number 020506

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mathematics and Physics
2010 Higher Education Research Data Collection
ERA 2012 Admin Only
 
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Citation counts: TR Web of Science Citation Count  Cited 37 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 32 times in Scopus Article | Citations
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Created: Thu, 03 Sep 2009, 07:49:38 EST by Mr Andrew Martlew on behalf of Physics