Strong Coupling Cavity QED with Gate-Defined Double Quantum Dots Enabled by a High Impedance Resonator

被引：247

作者：

Stockklauser, A. ^{[1
]}

Scarlino, P. ^{[1
]}

Koski, J. V. ^{[1
]}

Gasparinetti, S. ^{[1
]}

Andersen, C. K. ^{[1
]}

Reichl, C. ^{[1
]}

Wegscheider, W. ^{[1
]}

Ihn, T. ^{[1
]}

Ensslin, K. ^{[1
]}

Wallraff, A. ^{[1
]}

机构：

[1] ETH, Dept Phys, CH-8093 Zurich, Switzerland

来源：

PHYSICAL REVIEW X | 2017年 / 7卷 / 01期

基金：

瑞士国家科学基金会;

关键词：

CIRCUIT; QUBIT; ELECTRODYNAMICS; PHOTONS; ATOM; SPIN;

D O I：

10.1103/PhysRevX.7.011030

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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 pi = 238 MHz at a resonator linewidth kappa/2 pi = 12 MHz and a DQD charge qubit decoherence rate of gamma(2) = 2 pi = 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.

引用

页数：6

共 35 条

[1] Tunable microwave impedance matching to a high impedance source using a Josephson metamaterial [J].