Chiral classical and quantum acoustics with hole-spin qubits
Abstract
Gate-defined hole spins combine strong spin-orbit coupling with exceptional strain sensitivity, making surface acoustic waves a natural route to remote, phase-coherent control. We show that counterpropagating surface acoustic waves can differ in coupling strength and in whether they predominantly drive spin rotations or modulate the qubit frequency. We call the transverse transition-strength imbalance spin-acoustic chirality and show that it is tunable through gate-controlled reshaping of the dot confinement. Combining a multiband Luttinger-Kohn Hamiltonian with the Bir-Pikus description of strain and 3D piezoelectric finite-element simulations, we obtain the acoustic g-matrix modulation governing coherent SAW driving. Quantizing the same strain-mediated interaction yields the corresponding single-phonon coupling, and a generalized anisotropic Rabi interaction with co-rotating, counter-rotating, and longitudinal components, linking classical chirality to quantum anisotropy and directional one-phonon emission. Magnetic field orientation and dot shape tune the acoustic chirality and operator selectivity. We illustrate this framework through bichromatic coherence protection and phonon-mediated heralded Bell-state initialization.
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BibTeX
@misc{wang2026chiral,
title = {{Chiral classical and quantum acoustics with hole-spin qubits}},
author = {Zhanning Wang and Yongtao Li and Nelson E. Rivas and Gonzalo García and Irene Castro and Rubén Seoane Souto and Daniel Ramos and José C. Abadillo-Uriel},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.18485},
eprint = {2609.18485},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.18485},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Chiral classical and quantum acoustics with hole-spin qubits
AU - Zhanning Wang
AU - Yongtao Li
AU - Nelson E. Rivas
AU - Gonzalo García
AU - Irene Castro
AU - Rubén Seoane Souto
AU - Daniel Ramos
AU - José C. Abadillo-Uriel
PY - 2026
DA - 2026/09/16
PB - arXiv
DO - 10.48550/arxiv.2609.18485
UR - https://arxiv.org/abs/2609.18485
AB - Gate-defined hole spins combine strong spin-orbit coupling with exceptional strain sensitivity, making surface acoustic waves a natural route to remote, phase-coherent control. We show that counterpropagating surface acoustic waves can differ in coupling strength and in whether they predominantly drive spin rotations or modulate the qubit frequency. We call the transverse transition-strength imbalance spin-acoustic chirality and show that it is tunable through gate-controlled reshaping of the dot confinement. Combining a multiband Luttinger-Kohn Hamiltonian with the Bir-Pikus description of strain and 3D piezoelectric finite-element simulations, we obtain the acoustic g-matrix modulation governing coherent SAW driving. Quantizing the same strain-mediated interaction yields the corresponding single-phonon coupling, and a generalized anisotropic Rabi interaction with co-rotating, counter-rotating, and longitudinal components, linking classical chirality to quantum anisotropy and directional one-phonon emission. Magnetic field orientation and dot shape tune the acoustic chirality and operator selectivity. We illustrate this framework through bichromatic coherence protection and phonon-mediated heralded Bell-state initialization.
ER -