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arXiv · 2407.15387

A Nanomechanical Atomic Force Qubit

Shahin Jahanbani·Zi-Huai Zhang·Binhan Hua·Kadircan Godeneli·Boris Müllendorff·Xueyue Zhang·Haoxin Zhou·Alp Sipahigil
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Abstract

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.

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Shahin Jahanbani, Zi-Huai Zhang, Binhan Hua, Kadircan Godeneli, Boris Müllendorff, Xueyue Zhang, Haoxin Zhou, Alp Sipahigil. 2024-07-22. A Nanomechanical Atomic Force Qubit. https://arxiv.org/abs/2407.15387

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