Linear optical quantum computation with imperfect entangled photon-pair sources and inefficient non-photon-number-resolving detectors

Journal Article · Sat May 15 00:00:00 EDT 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.81.052303· OSTI ID:21408782

Yanxiao, Gong ^[1]; Xubo, Zou; Guangcan, Guo ^[2]; Ralph, Timothy C ^[3]; Shining, Zhu ^[1]

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1. National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing, 210093 (China)
2. Key Laboratory of Quantum Information, University of Science and Technology of China, CAS, Hefei, 230026 (China)
3. Centre for Quantum Computer Technology and Physics Department, University of Queensland, Queensland 4072, Brisbane (Australia)

We propose a scheme for efficient cluster state quantum computation by using imperfect polarization-entangled photon-pair sources, linear optical elements, and inefficient non-photon-number-resolving detectors. The efficiency threshold for loss tolerance in our scheme requires the product of source and detector efficiencies should be >1/2, the best known figure. This figure applies to uncorrelated loss. We further find that the loss threshold is unaffected by correlated loss in the photon pair source. Our approach sheds new light on efficient linear optical quantum computation with imperfect experimental conditions.

• OSTI ID: 21408782
• Journal Information: Physical Review. A, Vol. 81, Issue 5; Other Information: DOI: 10.1103/PhysRevA.81.052303; (c) 2010 The American Physical Society; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
EFFICIENCY
LOSSES
PHOTONS
POLARIZATION
QUANTUM COMPUTERS
QUANTUM ENTANGLEMENT
TOLERANCE
BOSONS
COMPUTERS
ELEMENTARY PARTICLES
MASSLESS PARTICLES