Josephson Amplifier for Qubit Readout

Abstract

We report on measurements of a Josephson amplifier (J-amp) suitable for quantum-state qubit readout in the microwave domain. It consists of two microstrip resonators which intersect at a Josephson ring modulator. A maximum gain of about 20 dB, a bandwidth of 9 MHz, and a center-frequency tunability of about 60 MHz with gain in excess of 10 dB have been attained for idler and signal of frequencies 6.4 GHz and 8.1 GHz, in accordance with theory. Maximum input power measurements of the J-amp show a relatively good agreement with theoretical prediction. We discuss how the amplifier characteristics can be improved.

9 pages, 4 figures

References in corpus (12)

• Fluxonium: single Cooper pair circuit free of charge offsets
• Amplification and squeezing of quantum noise with a tunable Josephson metamaterial
• Phase preserving amplification near the quantum limit with a Josephson Ring Modulator
• Observation of quantum jumps in a superconducting artificial atom
• A widely tunable parametric amplifier based on a SQUID array resonator
• Dispersive magnetometry with a quantum limited SQUID parametric amplifier
• Protocols for optimal readout of qubits using a continuous quantum nondemolition measurement
• Ultimate on-chip quantum amplifier
• Input Impedance and Gain of a Gigahertz Amplifier Using a DC SQUID in a Quarter Wave Resonator
• Nonlinear microwave response of aluminum weak-link Josephson oscillators
• Noise Performance of Lumped Element Direct Current Superconducting Quantum Interference Device Amplifiers in the 4 GHz-8 GHz Range
• Phase sensitive amplification in a superconducting stripline resonator integrated with a dc-SQUID

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