Microwave Detection of Electron-Phonon Interactions in a Cavity-Coupled Double Quantum Dot

T. R. Hartke, Y. Y. Liu, M. J. Gullans, J. R. Petta

Research output: Contribution to journalArticle

12 Scopus citations

Abstract

Quantum confinement leads to the formation of discrete electronic states in quantum dots. Here we probe electron-phonon interactions in a suspended InAs nanowire double quantum dot (DQD) that is electric-dipole coupled to a microwave cavity. We apply a finite bias across the wire to drive a steady state population in the DQD excited state, enabling a direct measurement of the electron-phonon coupling strength at the DQD transition energy. The amplitude and phase response of the cavity field exhibit oscillations that are periodic in the DQD energy level detuning due to the phonon modes of the nanowire. The observed cavity phase shift is consistent with theory that predicts a renormalization of the cavity center frequency by coupling to phonons.

Original languageEnglish (US)
Article number097701
JournalPhysical review letters
Volume120
Issue number9
DOIs
StatePublished - Feb 27 2018

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Microwave Detection of Electron-Phonon Interactions in a Cavity-Coupled Double Quantum Dot'. Together they form a unique fingerprint.

  • Cite this