Harnessing Large Spin-Orbit Interactions for the Next Generation of Hole Spin Qubits
ORAL · Invited
Abstract
Hole nanostructures are leading candidates for large-scale quantum computers due to their pronounced spin-orbit interactions (SOIs) and remarkable tunability.
In this presentation, I will discuss various strategies for harnessing this tunability to enhance the performance of current hole spin qubits, with a focus on both silicon and germanium qubits.
Charge noise presents a significant obstacle for shuttling spins [1], a critical requirement to establish long-range connectivity between distant qubits.
Here, I will explore how SOIs can induce intricate spin dynamics that effectively filter out low-frequency noise, thereby improving the efficiency of spin shuttling processes.
Furthermore, the influence of SOIs extends to two-qubit gates, where exchange anisotropies [2,3], induced by these interactions, offer avenues for accelerating the execution of two-qubit gates without compromising fidelity.
This implies that by leveraging the unique properties of SOIs, novel methods can be devised to expedite gate operations, and even to encode quantum information more reliably [4], thus paving the way towards large-scale spin based quantum information processing.
In this presentation, I will discuss various strategies for harnessing this tunability to enhance the performance of current hole spin qubits, with a focus on both silicon and germanium qubits.
Charge noise presents a significant obstacle for shuttling spins [1], a critical requirement to establish long-range connectivity between distant qubits.
Here, I will explore how SOIs can induce intricate spin dynamics that effectively filter out low-frequency noise, thereby improving the efficiency of spin shuttling processes.
Furthermore, the influence of SOIs extends to two-qubit gates, where exchange anisotropies [2,3], induced by these interactions, offer avenues for accelerating the execution of two-qubit gates without compromising fidelity.
This implies that by leveraging the unique properties of SOIs, novel methods can be devised to expedite gate operations, and even to encode quantum information more reliably [4], thus paving the way towards large-scale spin based quantum information processing.
*This research was partly supported by the EU through the H2024 QLSI2 project, partly sponsored by the Army Research Office under Award Number: W911NF-23-1-0110, and partly by the NCCR Spin (Grant No. 51NF40-180604).
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Publication: [1] Bosco S. Zou, J. & Loss D (2024) PRX Quantum 5.2 020353. https://doi.org/10.1103/PRXQuantum.5.020353
[2] Geyer S., Hetényi B., Bosco S. et al. (2024) Nat. Phys. 20, 1152–1157 https://doi.org/10.1038/s41567-024-02481-5
[3] Spethmann M., Bosco S. et al. (2024) Phys. Rev. B 109.8 085303. https://doi.org/10.1103/PhysRevB.109.085303
[4] Bosco S. and Rimbach-Russ M. (2024) https://arxiv.org/abs/2410.05461
Presenters
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Stefano Bosco
- QuTech, TU Delft