2017/01/31 by A. Stockklauser, P. Scarlino, J. V. Koski +7 · 1 citation
Computer Science · Physics and Astronomy · #Mechanical and Optical Resonators #Quantum Information and Cryptography #Quantum and electron transport phenomena
paper · pdf · doi:10.1103/physrevx.7.011030
openalex publication_date 2017/03/09 · openalex created_date 2017/03/16 · openalex updated_date 2026/07/28
The strong coupling limit of cavity quantum electrodynamics (QED) implies the capability of a matterlike quantum system to coherently transform an individual excitation into a single photon within a resonant structure. This not only enables essential processes required for quantum information processing but also allows for fundamental studies of matter-light interaction. In this work, we demonstrate strong coupling between the charge degree of freedom in a gate-defined GaAs double quantum dot (DQD) and a frequency-tunable high impedance resonator realized using an array of superconducting quantum interference devices. In the resonant regime, we resolve the vacuum Rabi mode splitting of size 2g=2 238 MHz at a resonator linewidth =2 12 MHz and a DQD charge qubit decoherence rate of 2 =2 40 MHz extracted independently from microwave spectroscopy in the dispersive regime. Our measurements indicate a viable path towards using circuit-based cavity QED for quantum information processing in semiconductor nanostructures.