Amplifying single-photon nonlinearity using weak measurements |
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Authors: | Feizpour Amir Xing Xingxing Steinberg Aephraim M |
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Institution: | Centre for Quantum Information and Quantum Control, Department of Physics, University of Toronto, Ontario, Canada. feizpour@physics.utoronto.ca |
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Abstract: | We show that weak measurement can be used to "amplify" optical nonlinearities at the single-photon level, such that the effect of one properly postselected photon on a classical beam may be as large as that of many unpostselected photons. We find that "weak-value amplification" offers a marked improvement in the signal-to-noise ratio in the presence of technical noise with long correlation times. Unlike previous weak-measurement experiments, our proposed scheme has no classical equivalent. |
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