Improving the fidelity of optical Zeno gates via distillation

Journal Article · Fri Dec 15 00:00:00 EST 2006 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.74.062325· OSTI ID:20976454

Leung, Patrick M; Ralph, Timothy C ^[1]

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1. Centre for Quantum Computer Technology, Department of Physics, University of Queensland, Brisbane 4072 (Australia)

We have modeled the Zeno effect controlled-sign gate of Franson et al. [Phys. Rev. A 70, 062302 (2004)] and shown that high two-photon to one-photon absorption ratios, {kappa}, are needed for high fidelity free-standing operation. Hence we instead employ this gate for cluster state fusion, where the requirement for {kappa} is less restrictive. With the help of partially offline one-photon and two-photon distillations, we can achieve a fusion gate with unity fidelity but nonunit probability of success. We conclude that for {kappa}>2200, the Zeno fusion gate will out perform the equivalent linear optics gate.

• OSTI ID: 20976454
• Journal Information: Physical Review. A, Vol. 74, Issue 6; Other Information: DOI: 10.1103/PhysRevA.74.062325; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABSORPTION
DISTILLATION
OPERATION
OPTICS
PHOTONS
PROBABILITY