A low-loss ferrite circulator as a tunable chiral quantum system
- URL: http://arxiv.org/abs/2106.11283v2
- Date: Thu, 4 Nov 2021 15:06:02 GMT
- Title: A low-loss ferrite circulator as a tunable chiral quantum system
- Authors: Ying-Ying Wang, Sean van Geldern, Thomas Connolly, Yu-Xin Wang,
Alexander Shilcusky, Alexander McDonald, Aashish A. Clerk, and Chen Wang
- Abstract summary: We demonstrate a low-loss waveguide circulator constructed with single-crystalline yttrium iron garnet (YIG) in a 3D cavity.
We show the coherent coupling of its chiral internal modes with integrated superconducting niobium cavities.
We also probe experimentally the effective non-Hermitian dynamics of this system and its effective non-reciprocal eigenmodes.
- Score: 108.66477491099887
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Ferrite microwave circulators allow one to control the directional flow of
microwave signals and noise, and thus play a crucial role in present-day
superconducting quantum technology. They are typically viewed as a black-box,
and their internal structure is not specified, let alone used as a resource. In
this work, we demonstrate a low-loss waveguide circulator constructed with
single-crystalline yttrium iron garnet (YIG) in a 3D cavity, and analyze it as
a multi-mode hybrid quantum system with coupled photonic and magnonic
excitations. We show the coherent coupling of its chiral internal modes with
integrated superconducting niobium cavities, and how this enables tunable
non-reciprocal interactions between the intra-cavity photons. We also probe
experimentally the effective non-Hermitian dynamics of this system and its
effective non-reciprocal eigenmodes. The device platform provides a test bed
for implementing non-reciprocal interactions in open-system circuit QED.
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