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Josephson junctions and quantum microwave circuits 2: amplifiers – Michael Hatridge

Date: Tue. November 10th, 2015, 11:30 am-12:30 pm
Location: Rockefeller 221

Here we will take the concepts from lecture one and set out to construct from the same Josephson junctions very weakly non-linear circuits which operate as phase-preserving amplifiers. I’ll discuss some of the numerous chall enges in designing superconducting amplifiers which are robust and simple while achieving nearly ideal performance. I’ll also discuss the quantum-limit of amplification, how closely we can approach it, and how such amplifiers allow precision readout of our quantum bits.

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