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Proceedings Paper

Practical quantum interferometry using photonic N00N states
Author(s): Gerald Gilbert; Michael Hamrick; Yaakov S. Weinstein
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Paper Abstract

We study the phase estimation abilites of photonic N00N states, propagating in an attenuating medium, is analyzed. It is shown that N00N states of a given number of enangled photons N, never achieve the 1/N Heisenberg limit if the propagation occurs through lossy medium. It is also shown that a signal comprised of an attenuated separable state of N photons will actually produce a better phase estimate than a signal comprised of an equally attenuated N00N state unless the transmittance of the medium is very high. Thus, for most practical applications in realistic scenarios with attenuation, the resolution of N00N state-based phase estimation not only does not achieve the Heisenberg Limit, but is actually worse than the 1/(square root of)N Standard Quantum Limit. This performance deficit becomes more pronounced as the number, N, of photons in the signal increases.

Paper Details

Date Published: 25 April 2007
PDF: 9 pages
Proc. SPIE 6573, Quantum Information and Computation V, 65730K (25 April 2007); doi: 10.1117/12.719896
Show Author Affiliations
Gerald Gilbert, Mitre (United States)
Michael Hamrick, Mitre (United States)
Yaakov S. Weinstein, Mitre (United States)

Published in SPIE Proceedings Vol. 6573:
Quantum Information and Computation V
Eric J. Donkor; Andrew R. Pirich; Howard E. Brandt, Editor(s)

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