Squeezing Limit of the Josephson Ring Modulator as a Non-Degenerate Parametric Amplifier

• URL: http://arxiv.org/abs/2206.10867v1
• Date: Wed, 22 Jun 2022 06:26:58 GMT
• Title: Squeezing Limit of the Josephson Ring Modulator as a Non-Degenerate Parametric Amplifier
• Authors: Dong Hwan Kim, Su-Yong Lee, Zaeill Kim, Taek Jeong, and Duk Y. Kim
• Abstract summary: We solve the master equation of three bosonic modes describing the Josephson ring modulator. We show that the third-order interaction from the three-wave mixing process intrinsically limits squeezing and reduces gain.
• Score: 1.8839378985061934
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Two-mode squeezed vacuum states are a crucial component of quantum technologies. In the microwave domain, they can be produced by Josephson ring modulator which acts as a three-wave mixing non-degenerate parametric amplifier. Here, we solve the master equation of three bosonic modes describing the Josephson ring modulator with a novel numerical method to compute squeezing of output fields and gain at low signal power. We show that the third-order interaction from the three-wave mixing process intrinsically limits squeezing and reduces gain. Since our results are related to other general cavity-based three-wave mixing processes, these imply that any non-degenerate parametric amplifier will have an intrinsic squeezing limit in the output fields.

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