Use of maximally entangled N-photon states for practical quantum interferometry

Journal Article · Fri Aug 15 00:00:00 EDT 2008 · Journal of the Optical Society of America. Part B, Optical Physics

DOI:https://doi.org/10.1364/JOSAB.25.001336· OSTI ID:21100349

Gilbert, Gerald; Hamrick, Michael; Weinstein, Yaakov S ^[1]

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1. Quantum Information Science Group, MITRE, 260 Industrial Way West, Eatontown, New Jersey 07724 (United States)

The phase estimation performance of photonic N00N states propagating in an attenuating medium is analyzed. It is shown that the Heisenberg limit is never achieved and that an attenuated separable state of N photons will actually produce a better phase estimate than an equally attenuated N00N state unless the transmittance of the medium is sufficiently high. Thus, for most practical applications with realistic attenuation, N00N-state-based phase estimation actually performs worse than the standard quantum limit. This performance deficit becomes more pronounced as the number of photons in the signal increases.

• OSTI ID: 21100349
• Journal Information: Journal of the Optical Society of America. Part B, Optical Physics, Vol. 25, Issue 8; Other Information: DOI: 10.1364/JOSAB.25.001336; (c) 2008 Optical Society of America; Country of input: International Atomic Energy Agency (IAEA); ISSN 0740-3224
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
INTERFEROMETRY
PERFORMANCE
PHOTONS
QUANTUM ENTANGLEMENT
QUANTUM MECHANICS
SIGNALS