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Ultra-sensitive phase estimation with white light

By Chuan-Feng Li, Xiao-Ye Xu, Jian-Shun Tang, Jin-Shi Xu and Guang-Can Guo

Abstract

An improvement of the scheme by Brunner and Simon [Phys. Rev. Lett. 105, 010405 (2010)] is proposed in order to show that quantum weak measurements can provide a method to detect ultrasmall longitudinal phase shifts, even with white light. By performing an analysis in the frequency domain, we find that the amplification effect will work as long as the spectrum is large enough, irrespective of the behavior in the time domain. As such, the previous scheme can be notably simplified for experimental implementations

Topics: Quantum Physics
Year: 2011
DOI identifier: 10.1103/PhysRevA.83.044102
OAI identifier: oai:arXiv.org:1102.4902
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