Fault-Tolerant Linear Optical Quantum Computing with Small-Amplitude Coherent States

Lund, A. P., Ralph, T. C. and Haselgrove, H. L. (2008) Fault-Tolerant Linear Optical Quantum Computing with Small-Amplitude Coherent States. Physical Review Letters, 100 3: 030503-1-030503-4. doi:10.1103/PhysRevLett.100.030503

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Author Lund, A. P.
Ralph, T. C.
Haselgrove, H. L.
Title Fault-Tolerant Linear Optical Quantum Computing with Small-Amplitude Coherent States
Journal name Physical Review Letters   Check publisher's open access policy
ISSN 0031-9007
Publication date 2008-01-25
Sub-type Article (original research)
DOI 10.1103/PhysRevLett.100.030503
Open Access Status File (Publisher version)
Volume 100
Issue 3
Start page 030503-1
End page 030503-4
Total pages 4
Editor Basbas, G.
Sandweiss, J.
Schuhmann, R.B.
Brown, S.G.
Place of publication United States
Publisher American Physical Society
Collection year 2009
Language eng
Subject C1
020604 Quantum Optics
970102 Expanding Knowledge in the Physical Sciences
Abstract Quantum computing using two coherent states as a qubit basis is a proposed alternative architecture with lower overheads but has been questioned as a practical way of performing quantum computing due to the fragility of diagonal states with large coherent amplitudes. We show that using error correction only small amplitudes (alpha>1.2) are required for fault-tolerant quantum computing. We study fault tolerance under the effects of small amplitudes and loss using a Monte Carlo simulation. The first encoding level resources are orders of magnitude lower than the best single photon scheme.
Keyword Quantum computation architectures and implementations
Q-Index Code C1
Q-Index Status Confirmed Code

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Created: Fri, 20 Mar 2009, 18:06:37 EST by Ruth Forrest on behalf of ARC Ctr of Excell for Quantum Computer Technology