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SQUIDs - Low Temperature Laboratory

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Summary<br />

• Gain ≥ 20 dB for frequencies ≤ 1 GHz<br />

• Cooled to 20 mK, T N is within a factor of 2 of the quantum limit<br />

• Noise temperature 40 times lower than state-of-the-art cooled semiconductor<br />

amplifiers<br />

Future directions<br />

• Implement second-generation axion detector: expected to increase scan<br />

rate by three orders of magnitude<br />

• Post-amplifier for radio-frequency single-electron transistor: should<br />

enable quantum-limited charge amplifier

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