A low-noise on-chip coherent microwave source
- URL: http://arxiv.org/abs/2103.07617v2
- Date: Tue, 23 Nov 2021 05:01:14 GMT
- Title: A low-noise on-chip coherent microwave source
- Authors: Chengyu Yan, Juha Hassel, Visa Vesterinen, Jinli Zhang, Joni Ikonen,
Leif Gr\"onberg, Jan Goetz, and Mikko M\"ott\"onen
- Abstract summary: We report an on-chip device that is based on a Josephson junction coupled to a spiral resonator and is capable of coherent continuous-wave microwave emission.
The infidelity of typical quantum gate operations due to the phase noise of this cryogenic 25-pW microwave source is less than 0.1% up to 10-ms evolution times.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: The scaleup of quantum computers operating in the microwave domain requires
advanced control electronics, and the use of integrated components that operate
at the temperature of the quantum devices is potentially beneficial. However,
such an approach requires ultra-low power dissipation and high signal quality
in order to ensure quantum-coherent operations. Here, we report an on-chip
device that is based on a Josephson junction coupled to a spiral resonator and
is capable of coherent continuous-wave microwave emission. We show that
characteristics of the device accurately follow a theory based on a
perturbative treatment of the capacitively shunted Josephson junction as a gain
element. The infidelity of typical quantum gate operations due to the phase
noise of this cryogenic 25-pW microwave source is less than 0.1% up to 10-ms
evolution times, which is below the infidelity caused by dephasing in
state-of-the-art superconducting qubits. Together with future cryogenic
amplitude and phase modulation techniques, our approach may lead to scalable
cryogenic control systems for quantum processors.
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