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Decoherence of quantum-enhanced timing accuracy

Tsang, Mankei (2007) Decoherence of quantum-enhanced timing accuracy. Physical Review A, 75 (6). Art. No. 063809. ISSN 1050-2947.

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Quantum enhancement of optical pulse timing accuracy is investigated in the Heisenberg picture. Effects of optical loss, group-velocity dispersion, and Kerr nonlinearity on the position and momentum of an optical pulse are studied via Heisenberg equations of motion. Using the developed formalism, the impact of decoherence by optical loss on the use of adiabatic soliton control for beating the timing standard quantum limit [M. Tsang, Phys. Rev. Lett. 97, 023902 (2006)] is analyzed theoretically and numerically. The analysis shows that an appreciable enhancement can be achieved using current technology, despite an increase in timing jitter mainly due to the Gordon-Haus effect. The decoherence effect of optical loss on the transmission of quantum-enhanced timing information is also studied, in order to identify situations in which the enhancement is able to survive.

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Additional Information:©2007 The American Physical Society (Received 4 April 2007; published 11 June 2007) This work is financially supported by the DARPA Center for Optofluidic Integration and the National Science Foundation through the Center for the Science and Engineering of Materials (Grant No. DMR-0520565).
Subject Keywords:quantum optics; optical losses; optical dispersion; optical Kerr effect; optical solitons
Issue or Number:6
Record Number:CaltechAUTHORS:TSApra07b
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:8426
Deposited By: Archive Administrator
Deposited On:03 Aug 2007
Last Modified:02 Oct 2019 23:50

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