Nuclear spin-wave quantum register for a solid state qubit
- URL: http://arxiv.org/abs/2108.12723v1
- Date: Sun, 29 Aug 2021 00:27:01 GMT
- Title: Nuclear spin-wave quantum register for a solid state qubit
- Authors: Andrei Ruskuc, Chun-Ju Wu, Jake Rochman, Joonhee Choi and Andrei
Faraon
- Abstract summary: coherent quantum systems in nuclear spin-rich hosts enables exploration of a much broader range of materials for quantum information applications.
We develop a robust quantum control protocol to manipulate the multi-level nuclear spin states of neighbouring 51V5+ lattice ions.
Our platform is deterministic and reproducible, ensuring identical quantum registers for all 171Yb qubits.
- Score: 3.120672897353664
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: 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.
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