Microwave photon generation in a doubly tunable superconducting resonator
Journal article, 2018

We have created a doubly tunable resonator, with the intention to simulate relativistic motion of the resonator boundaries in real space. Our device is a superconducting coplanar-waveguide microwave resonator, with fundamental resonant frequency ω 1 / (2 π ) ~ 5 GHz. Both of its ends are terminated to ground via dc-SQUIDs, which serve as magnetic-flux-controlled inductances. Applying a flux to either SQUID allows the tuning of ω 1 / (2 π ) by approximately 700 MHz. Using two separate on-chip magnetic-flux lines, we modulate the SQUIDs with two tones of equal frequency, close to 2 ω 1 . We observe photon generation, at ω 1 , above a certain pump amplitude threshold. By varying the relative phase of the two pumps we are able to control this threshold, in good agreement with a theoretical model. At the same time, some of our observations deviate from the theoretical predictions, which we attribute to parasitic couplings resulting in current driving of the SQUIDs

Author

Ida-Maria Svensson

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Technology

Mathieu Pierre

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

Michael Roger Andre Simoen

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

Waltraut Wustmann

Chalmers, Microtechnology and Nanoscience (MC2), Applied Quantum Physics

Philip Krantz

Administration MC2

Andreas Bengtsson

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

Göran Johansson

Chalmers, Microtechnology and Nanoscience (MC2), Applied Quantum Physics

Jonas Bylander

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Technology

Vitaly Shumeiko

Chalmers, Microtechnology and Nanoscience (MC2), Applied Quantum Physics

Per Delsing

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Technology

Journal of Physics: Conference Series

17426588 (ISSN) 17426596 (eISSN)

Vol. 969 1 012146

Areas of Advance

Nanoscience and Nanotechnology (2010-2017)

Infrastructure

Nanofabrication Laboratory

Subject Categories

Condensed Matter Physics

DOI

10.1088/1742-6596/969/1/012146

More information

Latest update

1/17/2019