Journal article · Preprint article
Quantum interface of an electron and a nuclear ensemble
Coherent excitation of an ensemble of quantum objects underpins quantum many-body phenomena and offers the opportunity to realize a memory that stores quantum information. Thus far, a deterministic and coherent interface between a spin qubit and such an ensemble has remained elusive. Here, 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 individual quantized electronic-nuclear spin transitions. Finally, we perform coherent optical rotations of a single collective nuclear spin excitation—a spin wave. 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.
Language: | English |
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Publisher: | American Association for the Advancement of Science |
Year: | 2019 |
Pages: | 62-66 |
ISSN: | 10959203 and 00368075 |
Types: | Journal article and Preprint article |
DOI: | 10.1126/science.aaw2906 |
ORCIDs: | 0000-0002-7100-0847 , 0000-0002-6931-9015 , 0000-0001-6104-7919 , 0000-0002-6455-2168 , 0000-0002-4067-1613 , 0000-0003-2001-6619 , 0000-0002-8287-0282 , 0000-0002-8980-9628 and 0000-0003-3852-0944 |