Group publications 1
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arXiv:2407.15387 (2024)
@unpublished{jahanbani_nanomechanical_2024, title = {A {Nanomechanical} {Atomic} {Force} {Qubit}}, url = {http://arxiv.org/abs/2407.15387}, doi = {10.48550/arXiv.2407.15387}, author = {Jahanbani, Shahin and Zhang, Zi-Huai and Hua, Binhan and Godeneli, Kadircan and Müllendorff, Boris and Zhang, Xueyue and Zhou, Haoxin and Sipahigil, Alp}, month = jul, year = {2024}, note = {arXiv:2407.15387 [quant-ph]}, arxiv = {2407.15387} }Silicon nanomechanical resonators display ultra-long lifetimes at cryogenic temperatures and microwave frequencies. Achieving quantum control of single-phonons in these devices has so far relied on nonlinearities enabled by coupling to ancillary qubits. In this work, we propose using atomic forces to realize a silicon nanomechanical qubit without coupling to an ancillary qubit. The proposed qubit operates at 60 MHz with a single-phonon level anharmonicity of 5 MHz. We present a circuit quantum acoustodynamics architecture where electromechanical resonators enable dispersive state readout and multi-qubit operations. The combination of strong anharmonicity, ultrahigh mechanical quality factors, and small footprints achievable in this platform could enable quantum-nonlinear phononics for quantum information processing and transduction.