Nonsymmetrized Correlations in Quantum Noninvasive Measurements

Bednorz, Adam; Bruder, Christoph; Reulet, Bertrand; Belzig, Wolfgang

Nonsymmetrized Correlations in Quantum Noninvasive Measurements

Dateien

Bednorz_245235.pdfGröße: 173.76 KBDownloads: 211

Datum

2013

Autor:innen

Bednorz, Adam

Bruder, Christoph

Reulet, Bertrand

Belzig, Wolfgang

Open Access-Veröffentlichung

Open Access Green

Sammlungen

Physik

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

Physical Review Letters. 2013, 110(25). ISSN 0031-9007. eISSN 1079-7114. Available under: doi: 10.1103/PhysRevLett.110.250404

Zusammenfassung

A long-standing problem in quantum mesoscopic physics is which operator order corresponds to noise expressions like $\langle I(-\omega)I(\omega)\rangle$, where $I(\omega)$ is the measured current at frequency $\omega$. Symmetrized order describes a classical measurement while nonsymmetrized order corresponds to a quantum detector, e.g., one sensitive to either emission or absorption of photons. We show that both order schemes can be embedded in quantum weak-measurement theory taking into account measurements with memory, characterized by a memory function which is independent of a particular experimental detection scheme. We discuss the resulting quasiprobabilities for different detector temperatures and how their negativity can be tested on the level of second-order correlation functions already. Experimentally, this negativity can be related to the squeezing of the many-body state of the transported electrons in an ac-driven tunnel junction.

Fachgebiet (DDC)

530 Physik

Zitieren

ISO 690

BEDNORZ, Adam, Christoph BRUDER, Bertrand REULET, Wolfgang BELZIG, 2013. Nonsymmetrized Correlations in Quantum Noninvasive Measurements. In: Physical Review Letters. 2013, 110(25). ISSN 0031-9007. eISSN 1079-7114. Available under: doi: 10.1103/PhysRevLett.110.250404

BibTex

@article{Bednorz2013Nonsy-24523,
  year={2013},
  doi={10.1103/PhysRevLett.110.250404},
  title={Nonsymmetrized Correlations in Quantum Noninvasive Measurements},
  number={25},
  volume={110},
  issn={0031-9007},
  journal={Physical Review Letters},
  author={Bednorz, Adam and Bruder, Christoph and Reulet, Bertrand and Belzig, Wolfgang}
}

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