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Nuclear spin-wave quantum register for a solid state qubit

Ruskuc, Andrei and Wu, Chun-Ju and Rochman, Jake and Choi, Joonhee and Faraon, Andrei (2021) Nuclear spin-wave quantum register for a solid state qubit. . (Unpublished)

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Solid-state nuclear spins surrounding individual, optically addressable qubits provide a crucial resource for quantum networks, computation and simulation. While hosts with sparse nuclear spin baths are typically chosen to mitigate qubit decoherence, developing coherent quantum systems in nuclear spin-rich hosts enables exploration of a much broader range of materials for quantum information applications. The collective modes of these dense nuclear spin ensembles provide a natural basis for quantum storage, however, utilizing them as a resource for single spin qubits has thus far remained elusive. Here, by using a highly coherent, optically addressed ¹⁷¹Yb³⁺ qubit doped into a nuclear spin-rich yttrium orthovanadate crystal, we develop a robust quantum control protocol to manipulate the multi-level nuclear spin states of neighbouring ⁵¹V⁵⁺ lattice ions. Via a dynamically-engineered spin exchange interaction, we polarise this nuclear spin ensemble, generate collective spin excitations, and subsequently use them to implement a long-lived quantum memory. We additionally demonstrate preparation and measurement of maximally entangled ¹⁷¹Yb--⁵¹V Bell states. Unlike conventional, disordered nuclear spin based quantum memories, our platform is deterministic and reproducible, ensuring identical quantum registers for all ¹⁷¹Yb qubits. Our approach provides a framework for utilising the complex structure of dense nuclear spin baths, paving the way for building large-scale quantum networks using single rare-earth ion qubits.

Item Type:Report or Paper (Discussion Paper)
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URLURL TypeDescription Paper
Ruskuc, Andrei0000-0001-7684-7409
Faraon, Andrei0000-0002-8141-391X
Additional Information:Attribution 4.0 International (CC BY 4.0) This work was funded by the Institute of Quantum Information and Matter, an NSF Physics Frontiers Center (PHY-1733907) with support from the Moore Foundation, NSF 1820790, Office of Naval Research Award No. N00014-19-1-2182, Air Force Office of Scientific Research Grant No. FA9550-18-1-0374 and No. FA9550-21-1-0055, Northrop Grumman, General Atomics, and Weston Havens Foundation. The device nanofabrication was performed in the Kavli Nanoscience Institute at the California Institute of Technology. J.R. acknowledges the support from the Natural Sciences and Engineering Research Council of Canada (NSERC) (PGSD3-502844-2017). A.R. acknowledges the support from the Eddleman Graduate Fellowship. J.C. acknowledges support from the IQIM postdoctoral fellowship. We thank J. Kindem, J. G. Bartholomew, N. Yao, A. Sipahigil, M. Lei and T. Xie for useful discussion, and M. Shaw for help with superconducting photon detectors.
Group:Kavli Nanoscience Institute, Institute for Quantum Information and Matter
Funding AgencyGrant Number
Gordon and Betty Moore FoundationUNSPECIFIED
Office of Naval Research (ONR)N00014-19-1-2182
Air Force Office of Scientific Research (AFOSR)FA9550-18-1-0374
Air Force Office of Scientific Research (AFOSR)FA9550-21-1-0055
Northrop Grumman CorporationUNSPECIFIED
General AtomicsUNSPECIFIED
Weston Havens FoundationUNSPECIFIED
Natural Sciences and Engineering Research Council of Canada (NSERC)PGSD3-502844-2017
Eddleman FellowshipUNSPECIFIED
Institute for Quantum Information and Matter (IQIM)UNSPECIFIED
Record Number:CaltechAUTHORS:20210917-222630119
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:110955
Deposited By: George Porter
Deposited On:17 Sep 2021 22:44
Last Modified:17 Sep 2021 22:44

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