Photon mediated interaction between distant quantum dot circuits

TL;DR

This paper demonstrates photon-mediated interaction between two distant quantum dot circuits using cavity quantum electrodynamics, enabling scalable quantum computing and simulation of electron interactions.

Contribution

It introduces a novel architecture coupling quantum dots via cavity photons without direct tunnel or electrostatic interactions.

Findings

Quantum dots separated by 200 times their size interact via cavity photons.

The mediated interaction can be used for scalable quantum computing.

Potential for simulating phonon-mediated electron interactions on-chip.

Abstract

Engineering the interaction between light and matter is an important goal in the emerging field of quantum opto-electronics. Thanks to the use of cavity quantum electrodynamics architectures, one can envision a fully hybrid multiplexing of quantum conductors. Here, we use such an architecture to couple two quantum dot circuits . Our quantum dots are separated by 200 times their own size, with no direct tunnel and electrostatic couplings between them. We demonstrate their interaction, mediated by the cavity photons. This could be used to scale up quantum bit architectures based on quantum dot circuits or simulate on-chip phonon-mediated interactions between strongly correlated electrons.