Quantum control of hole spin qubits in double quantum dots

Abstract

Hole spin qubits in semiconductor quantum dots (QDs) are promising candidates for quantum information processing due to their weak hyperfine coupling to nuclear spins, and to the strong spin-orbit coupling which allows for rapid operation time. We propose a coherent control on two heavy-hole spin qubits in a double QD by a fast adiabatic driving protocol, which helps to achieve higher fidelities than other experimentally commonly used protocols as linear ramping, $\pi$-pulses or Landau-Zener passages. Using fast quasiadiabatic driving via spin-orbit coupling, it is possible to reduce charge noise significantly for qubit manipulation and achieve high robustness for the qubit initialization. We also implement one and two-qubit gates, in particular, NOT, CNOT, and SWAP-like gates, of hole spins in a double QD achieving fidelities above $99\%$, exhibiting the capability of hole spins to implement universal gates for quantum computing.

18 pages, 17 figures

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Cited by in corpus (17)

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• Extended Hubbard model describing small multi-dot arrays in bilayer graphene
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• Low-Dissipation Data Bus via Coherent Quantum Dynamics
• Photo-assisted spin transport in double quantum dots with spin-orbit interaction
• Quantum estimation and remote charge sensing with a hole-spin qubit in silicon
• Controllable single spin evolution at sub-harmonics of electric dipole spin resonance enhanced by four-level Landau-Zener-St{ü}ckelberg-Majorana interference
• A spinless spin qubit
• Quantum geometric protocols for fast high-fidelity adiabatic state transfer
• Envelope-function theory of inhomogeneous strain in semiconductor nanostructures
• Spin flip locking by the tunneling and relaxation in a driven double quantum dot with spin-orbit coupling
• Role of anisotropic confining potential and elliptical driving in dynamics of a Ge hole qubit
• Heavy-hole spin relaxation in quantum dots: Isotropic versus anisotropic effects
• Quantum entanglement response to pulsed gate modulation
• Robust composite two-qubit gates for silicon-based spin qubits