Weak measurements with a qubit meter

Details Weak measurements with a qubit meter Weak measurements with a qubit meter

2009-09-04

arxiv.org/abs/0909.0841v2

Physics Letters A 374, 34 (2009)

Physics

Quantum Physics

a couple of references added

Scientific paper

We derive schemes to measure the so-called weak values of quantum system observables by coupling of the system to a qubit meter system. We highlight, in particular, the meaning of the imaginary part of the weak values, and show how it can be measured directly on equal footing with the real part of the weak value. We present compact expressions for the weak value of single qubit observables and of product observables on qubit pairs. Experimental studies of the results are suggested with cold trapped ions.

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