Parametric Amplification and Squeezing with a Superconducting Resonator

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Copyright: Parker, Daniel
Abstract
Degenerate microwave amplifiers offer the potential to perform a measurement of weak mi- crowave signals free from any degradation to their signal-to-noise ratio, a benefit afforded by the quantum mechanics of their phase sensitive gain [1]. The degenerate parametric amplifier may even be used to enhance the signal-to-noise ratio of a weak measurement by squeezing the vacuum fluctuations below the standard quantum limit. Consequently, parametric amplifiers have featured in a number of recent sensitivity breakthroughs across multiple fields. These include the detection of gravitational waves [2], the search for dark matter [3], and high sensitivity electron spin resonance spectroscopy [4]. In this thesis, we present a novel microwave degenerate parametric amplifier based on the non-linear superconducting phenomenon of kinetic inductance. The device is a simple and robust quantum limited phase sensitive amplifier, which is well described by theory and shows potential as a highly-effective tool for the production of squeezed microwave light.
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Publication Year
2021
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Thesis
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Masters Thesis
UNSW Faculty
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