Abstract
Ever since its introduction by Aharonov, Alber and Vaidman in 1988 [1], weak measurement has played a crucial role in deeper understanding of many aspects of quantum mechanic. Its most unique feature may be that the “Weak Value” can be larger than any of the eigenvalues of the operator under study. This makes weak measurement a powerful tool for sensitive detection and estimation of weak signals, which has already been used for several precision measurements [2,3]. We proposed in 2011 that the same effect could be used to “amplify” the photon number in an optical beam [4]. The effect of the amplified photon number can be measured as a phase shift on a classical probe beam using a Kerr nonlinearity.
© 2015 IEEE
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