Quantum Interface of an Electron and a Nuclear Ensemble
Abstract
Coherent excitation of an ensemble of quantum objects underpins quantum many-body phenomena, and offers the opportunity to realize a quantum memory to store information from a qubit. Thus far, a deterministic and coherent interface between a single quantum system, e.g. a qubit, and such an ensemble has remained elusive. We first use an electron to cool the mesoscopic nuclear-spin ensemble of a semiconductor quantum dot to the nuclear sideband-resolved regime. We then implement an all-optical approach to access these individual quantized electronic-nuclear spin transitions. Finally, we perform coherent optical rotations of a single collective nuclear spin excitation corresponding to a spin wave called a nuclear magnon. These results constitute the building blocks of a dedicated local memory per quantum-dot spin qubit and promise a solid-state platform for quantum-state engineering of isolated many-body systems.
Cite
@article{arxiv.1812.07540,
title = {Quantum Interface of an Electron and a Nuclear Ensemble},
author = {Dorian Gangloff and Gabriel Éthier-Majcher and Constantin Lang and Emil Denning and Jonathan Bodey and Daniel Jackson and Edmund Clarke and Maxime Hugues and Claire Le Gall and Mete Atatüre},
journal= {arXiv preprint arXiv:1812.07540},
year = {2019}
}