WANG, Yue; MICCHI, G.; PISTOLESI, F.

doi:10.1088/1361-648X/aa903e

Métadonnées

Afficher la notice complète

Licence d’utilisation du document

WANG, Yue
Laboratoire Ondes et Matière d'Aquitaine [LOMA]

MICCHI, G.
Laboratoire Ondes et Matière d'Aquitaine [LOMA]

PISTOLESI, F.
Laboratoire Ondes et Matière d'Aquitaine [LOMA]

Langue

Article de revue

Ce document a été publié dans

Journal of Physics: Condensed Matter. 2017-10-26, vol. 29, n° 46, p. 465304

IOP Publishing

Résumé en anglais

In a recent publication we have studied theoretically the sensitivity of the mixing-current technique to detect nanomechanical motion by coupling the oscillator to a single-electron transistor in the incoherent tunnelling regime: hT << kBT, where Γ is the tunnelling rate, T is the electronic temperature, h and k B are the Planck and the Boltzmann constant, respectively. In this work we consider the same problem when the detection device is a quantum dot in the coherent tunnelling regime (hT >> kBT). In order to reach the best sensitivity we find that one should enter the strong coupling regime, as described in the recent publication (Micchi et al 2015 Phys. Rev. Lett. 115 206802) where a mechanical bistability is described. In this regime the electronic detection device strongly modifies the effective potential of the oscillator and the non-linearities determine the form of the displacement fluctuation spectrum. We find theoretical upper bounds to the sensitivity for the detection of the oscillation amplitude of the oscillator. It turns out that it is convenient to work as close as possible to the bistability.< Réduire

Métadonnées

Licence d’utilisation du document

Sensitivity of the mixing-current technique for the detection of mechanical motion in the coherent tunnelling regime

Langue

Ce document a été publié dans

Résumé en anglais

DOI

Origine

Unités de recherche