Please use this identifier to cite or link to this item:
Title: Quantum phase estimation with lossy interferometers
Authors: Demkowicz-Dobrzanski, R.
Dorner, U.
Smith, B.J. 
Lundeen, J.S.
Wasilewski, W.
Banaszek, K.
Walmsley, I.A.
Issue Date: 6-Aug-2009
Citation: Demkowicz-Dobrzanski, R., Dorner, U., Smith, B.J., Lundeen, J.S., Wasilewski, W., Banaszek, K., Walmsley, I.A. (2009-08-06). Quantum phase estimation with lossy interferometers. Physical Review A - Atomic, Molecular, and Optical Physics 80 (1) : -. ScholarBank@NUS Repository.
Abstract: We give a detailed discussion of optimal quantum states for optical two-mode interferometry in the presence of photon losses. We derive analytical formulae for the precision of phase estimation obtainable using quantum states of light with a definite photon number and prove that maximization of the precision is a convex optimization problem. The corresponding optimal precision, i.e., the lowest possible uncertainty, is shown to beat the standard quantum limit thus outperforming classical interferometry. Furthermore, we discuss more general inputs: states with indefinite photon number and states with photons distributed between distinguishable time bins. We prove that neither of these is helpful in improving phase estimation precision. © 2009 The American Physical Society.
Source Title: Physical Review A - Atomic, Molecular, and Optical Physics
ISSN: 10502947
DOI: 10.1103/PhysRevA.80.013825
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.


checked on Dec 12, 2018


checked on Dec 12, 2018

Page view(s)

checked on Jun 7, 2018

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.