【807】Quantum computing with hole spin qubits in silicon and germanium quantum dots.

7 Sept 2023, 16:00
15m
Room 116

Room 116

Talk Quantum Computing (by NCCR SPIN) Quantum Computing

Speaker

Stefano Bosco (University of Basel)

Description

Hole spin qubits are promising for large-scale quantum computers because of their large spin-orbit interaction (SOI).

I will present schemes to engineer SOI, optimizing quantum information processing. Large SOI mediates strong and tunable coupling between spins and photons, that can be engineered to be longitudinal. This coupling enables exact protocols for fast high-fidelity two-qubit gates that work at high temperatures.

However, SOI couples the spin to charge noise, causing decoherence. I will discuss qubit designs presenting sweet spots where noise is completely removed. In certain devices, the noise caused by hyperfine interactions with nuclear spins is also strongly suppressed, greatly enhancing coherence, and reducing the need for expensive isotopically-purified materials.

Theoretical Work Theory

Author

Stefano Bosco (University of Basel)

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