Voltage-Controlled Superconducting Quantum Bus
Mesoscale and Nanoscale Physics
2019-02-22 v1 Superconductivity
Quantum Physics
Abstract
We demonstrate the ability of an epitaxial semiconductor-superconductor nanowire to serve as a field-effect switch to tune a superconducting cavity. Two superconducting gatemon qubits are coupled to the cavity, which acts as a quantum bus. Using a gate voltage to control the superconducting switch yields up to a factor of 8 change in qubit-qubit coupling between the on and off states without detrimental effect on qubit coherence. High-bandwidth operation of the coupling switch on nanosecond timescales degrades qubit coherence.
Cite
@article{arxiv.1802.01327,
title = {Voltage-Controlled Superconducting Quantum Bus},
author = {L. Casparis and N. J. Pearson and A. Kringhøj and T. W. Larsen and F. Kuemmeth and J. Nygård and P. Krogstrup and K. D. Petersson and C. M. Marcus},
journal= {arXiv preprint arXiv:1802.01327},
year = {2019}
}