Using technical noise to increase the signal to noise ratio in weak measurements

Details Using technical noise to increase the signal to noise ratio in weak measurements Using technical noise to increase the signal to noise ratio in weak measurements

2011-11-23

arxiv.org/abs/1111.5523v1

Physics

Quantum Physics

Scientific paper

The advantages of weak measurements, and especially measurements of imaginary weak values, for precision enhancement, are discussed. A situation is considered in which the initial state of the measurement device varies randomly on each run, and is shown to be in fact beneficial when imaginary weak values are used. The result is supported by numerical calculation and also provides an explanation for the reduction of technical noise in some recent experimental results. A connection to quantum metrology formalism is made.

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