### Abstract

Lingua originale | English |
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pagine (da-a) | 1-10 |

Numero di pagine | 10 |

Rivista | Fortschritte der Physik |

Volume | 65 |

Stato di pubblicazione | Published - 2017 |

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### All Science Journal Classification (ASJC) codes

- Physics and Astronomy(all)

### Cita questo

*Fortschritte der Physik*,

*65*, 1-10.

**Detector's quantum backaction effects on a mesoscopic conductor and fluctuation-dissipation relation.** / Spagnolo, Bernardo; Valenti, Davide; Spagnolo, Bernardo; Falci, Giuseppe; Paladino, Elisabetta; Magazzù, Luca; Martin, Thierry.

Risultato della ricerca: Article

*Fortschritte der Physik*, vol. 65, pagg. 1-10.

}

TY - JOUR

T1 - Detector's quantum backaction effects on a mesoscopic conductor and fluctuation-dissipation relation

AU - Spagnolo, Bernardo

AU - Valenti, Davide

AU - Spagnolo, Bernardo

AU - Falci, Giuseppe

AU - Paladino, Elisabetta

AU - Magazzù, Luca

AU - Martin, Thierry

PY - 2017

Y1 - 2017

N2 - When measuring quantum mechanical properties of charge transport in mesoscopic conductors, backaction effects occur. We consider a measurement setup with an elementary quantum circuit, composed of an inductance and a capacitor, as detector of the current flowing in a nearby quantum point contact. A quantum Langevin equation for the detector variable including backaction effects is derived. Differences with the quantum Langevin equation obtained in linear response are pointed out. In this last case, a relation between fluctuations and dissipation is obtained, provided that an effective temperature of the quantum point contact is defined.

AB - When measuring quantum mechanical properties of charge transport in mesoscopic conductors, backaction effects occur. We consider a measurement setup with an elementary quantum circuit, composed of an inductance and a capacitor, as detector of the current flowing in a nearby quantum point contact. A quantum Langevin equation for the detector variable including backaction effects is derived. Differences with the quantum Langevin equation obtained in linear response are pointed out. In this last case, a relation between fluctuations and dissipation is obtained, provided that an effective temperature of the quantum point contact is defined.

UR - http://hdl.handle.net/10447/237016

UR - http://onlinelibrary.wiley.com/doi/10.1002/prop.201600059/full

M3 - Article

VL - 65

SP - 1

EP - 10

JO - Fortschritte der Physik

JF - Fortschritte der Physik

SN - 0015-8208

ER -