Passive On-Chip Superconducting Circulator Using a Ring of Tunnel Junctions
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Date
2018-05-25
Publication Type
Journal Article
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yes
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Abstract
We present the design of a passive, on-chip microwave circulator based on a ring of superconducting tunnel junctions. We investigate two distinct physical realizations, based on Josephson junctions (JJs) or quantum phase slip elements (QPS), with microwave ports coupled either capacitively (JJ) or inductively (QPS) to the ring structure. A constant bias applied to the center of the ring provides an effective symmetry breaking field, and no microwave or rf bias is required. We show that this design offers high isolation, robustness against fabrication imperfections and bias fluctuations, and a bandwidth in excess of 500 MHz for realistic device parameters.
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Publication status
published
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Journal / series
Volume
120 (21)
Pages / Article No.
213602
Publisher
American Physical Society