We propose to use a buckled plate as a qubit, where a double-well potential is mechanically produced by pushing the plate from both the sides. The right and left positions of the plate are assigned to be quantum states ∣0⟩ and ∣1⟩. Quantum effects emerge when the displacement is of the order of picometers, although the size of a buckled plate is of the order of 1μm. The NOT gate is executed by changing the buckling force acting on the plate, while the Pauli-Z gate and the phase-shift gate are executed by applying electric field. A two-qubit phase shift gate is materialized with the use of an electrostatic potential. They constitute a set of universal quantum gates. An examination of material parameters leads to a feasibility of a NEMS(Nano-Electro-Mechanical System)-based quantum computer.
@article{arxiv.2208.04528,
title = {Universal quantum computation based on Nano-Electro-Mechanical Systems},
author = {Motohiko Ezawa and Shun Yasunaga and Akio Higo and Tetuya Iizuka and Yoshio Mita},
journal= {arXiv preprint arXiv:2208.04528},
year = {2023}
}