Optimizing the Signal to Noise Ratio of a Beam Deflection Measurement with Interferometric Weak Values

Details Optimizing the Signal to Noise Ratio of a Beam Deflection Measurement with Interferometric Weak Values Optimizing the Signal to Noise Ratio of a Beam Deflection Measurement with Interferometric Weak Values

2009-10-13

arxiv.org/abs/0910.2410v1

D. J. Starling, P. B. Dixon, A. N. Jordan, and J. C. Howell, Physical Review A (Atomic, Molecular, and Optical Physics) 80, 04

Physics

Quantum Physics

Scientific paper

10.1103/PhysRevA.80.041803

The amplification obtained using weak values is quantified through a detailed investigation of the signal to noise ratio for an optical beam deflection measurement. We show that for a given deflection, input power and beam radius, the use of interferometric weak values allows one to obtain the optimum signal to noise ratio using a coherent beam. This method has the advantage of reduced technical noise and allows for the use of detectors with a low saturation intensity. We report on an experiment which improves the signal to noise ratio for a beam deflection measurement by a factor of 54 when compared to a measurement using the same beam size and a quantum limited detector.

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