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Quasiprobabilistic Interpretation of Weak Measurements in Mesoscopic Junctions

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2010

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http://nbn-resolving.de/urn:nbn:de:bsz:352-124379
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https://doi.org/10.1103/PhysRevLett.105.106803
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Physical Review Letters. 2010, 105(10). ISSN 0031-9007. Available under: doi: 10.1103/PhysRevLett.105.106803

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The impossibility of measuring noncommuting quantum mechanical observables is one of the most fascinating consequences of the quantum mechanical postulates. Hence, to date the investigation of quantum measurement and projection is a fundamentally interesting topic. We propose to test the concept of weak measurement of noncommuting observables in mesoscopic transport experiments, using a quasiprobabilistic description. We derive an inequality for current correlators, which is satisfied by every classical probability but violated by high-frequency fourth-order cumulants in the quantum regime for experimentally feasible parameters.

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ISO 690BEDNORZ, Adam, Wolfgang BELZIG, 2010. Quasiprobabilistic Interpretation of Weak Measurements in Mesoscopic Junctions. In: Physical Review Letters. 2010, 105(10). ISSN 0031-9007. Available under: doi: 10.1103/PhysRevLett.105.106803
BibTex
@article{Bednorz2010Quasi-12437,
  year={2010},
  doi={10.1103/PhysRevLett.105.106803},
  title={Quasiprobabilistic Interpretation of Weak Measurements in Mesoscopic Junctions},
  number={10},
  volume={105},
  issn={0031-9007},
  journal={Physical Review Letters},
  author={Bednorz, Adam and Belzig, Wolfgang}
}
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