Bulletin of the American Physical Society
54th Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics
Volume 68, Number 7
Monday–Friday, June 5–9, 2023; Spokane, Washington
Session S03: Precision Spectroscopy of Atoms and Molecules in Solids
10:30 AM–12:30 PM,
Thursday, June 8, 2023
Room: Ballroom 111 B
Chair: Andrew Jayich, UCSB
Abstract: S03.00004 : Single rare-earth ions in solid state hosts: a testbed for quantum networks and nuclear spin physics
12:00 PM–12:30 PM
Presenter:
Andrei Ruskuc
Authors:
Andrei Ruskuc
Chun-Ju Wu
(Caltech)
Joonhee Choi
(Stanford University)
Sophie Hermans
(California Institute of Technology)
Andrei Faraon
(Caltech)
Firstly, excellent optical and spin coherence properties are leveraged to explore small-scale quantum networking protocols. We demonstrate entanglement between optically distinguishable ions using a single photon heralding protocol. The narrow optical ensemble inhomogeneity provides a unique advantage amongst solid-state systems, enabling quantum connectivity between any pair of ions in a scalable fashion.
Secondly, high-fidelity spin control is leveraged to access local nuclear spins surrounding individual qubits. These spins comprise a dense ensemble which serves as a deterministic quantum resource. We utilise Hamiltonian engineering to generate tailored interactions enabling polarisation, coherent control and preparation of many-body nuclear spin states. We utilise these states as quantum registers and explore decoherence protected subspaces that eliminate the deleterious effect of common-mode noise.
These results showcase single rare-earth ions as a promising platform for the future quantum internet and as an interface to study dense nuclear spin ensembles.
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