Microwave photon generation in a doubly tunable superconducting resonator
Artikel i vetenskaplig tidskrift, 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

Författare

Ida-Maria Svensson

Kvantteknologi

Mathieu Pierre

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Michael Roger Andre Simoen

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Waltraut Wustmann

Chalmers, Mikroteknologi och nanovetenskap (MC2), Tillämpad kvantfysik

Philip Krantz

Administration MC2

Andreas Bengtsson

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Göran Johansson

Chalmers, Mikroteknologi och nanovetenskap (MC2), Tillämpad kvantfysik

Jonas Bylander

Kvantteknologi

Vitaly Shumeiko

Chalmers, Mikroteknologi och nanovetenskap (MC2), Tillämpad kvantfysik

Per Delsing

Kvantteknologi

Journal of Physics: Conference Series

1742-6588 (ISSN)

Vol. 969 1 012146-

Styrkeområden

Nanovetenskap och nanoteknik

Infrastruktur

Nanotekniklaboratoriet

Ämneskategorier

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