<sup>29</sup>Si nuclear spins as a resource for donor spin qubits in silicon
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Theoretical study of silicon nuclear spins as qubit registers; quantum physics.
The study investigates silicon nuclear spins for quantum computing.
Silicon nuclear spins as quantum-computing resources; condensed-matter physics.
Abstract
Nuclear spin registers in the vicinity of electron spins in solid state systems offer a powerful resource to address the challenge of scalability in quantum architectures. We investigate here the properties of $^{29}$Si nuclear spins surrounding donor atoms in silicon, and consider the use of such spins, combined with the donor nuclear spin, as a quantum register coupled to the donor electron spin. We find the coherence of the nearby $^{29}$Si nuclear spins is effectively protected by the presence of the donor electron spin, leading to coherence times in the second timescale - over two orders of magnitude greater than the coherence times in bulk silicon. We theoretically investigate the use of such a register for quantum error correction, including methods to protect nuclear spins from the ionisation/neutralisation of the donor, which is necessary for the re-initialisation of the ancillae qubits. This provides a route for multi-round quantum error correction using donors in silicon.
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The record
- Venue
- New Journal of Physics
- Topic
- Quantum and electron transport phenomena
- Field
- Physics and Astronomy
- Canadian institutions
- Simon Fraser University
- Funders
- European Research CouncilEngineering and Physical Sciences Research CouncilJapan Society for the Promotion of ScienceRoyal Society
- Keywords
- SpinsCoherence (philosophical gambling strategy)QubitCoherence timeQuantumSpin (aerodynamics)Quantum computer
- Has abstract in OpenAlex
- yes