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|Title:||Quantum phase estimation with lossy interferometers|
|Source:||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. https://doi.org/10.1103/PhysRevA.80.013825|
|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|
|Appears in Collections:||Staff Publications|
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