Nettet11. apr. 2024 · We use a flux-driven Josephson parametric amplifier (JPA) with the aim of approaching a noise level near the theoretically allowed limit of half quanta. In our measurements to characterize the JPA we have found the added noise to the system with a JPA as the first-stage amplifier to be lower than 110 mK at the frequencies from …
Quantum noise in Josephson-junction parametric amplifiers
Nettet4. des. 2014 · Broadband traveling-wave parametric amplifiers based both on the nonlinear kinetic inductance of superconducting thin films and on Josephson junctions are in development. By modifying the dispersion property of the amplifier circuit, referred to as dispersion engineering, the gain can be greatly enhanced and the size can be reduced. NettetJosephson Parametric Amplifiers with Lumped-Element Coupled Resonators (Master's thesis) A. Rubio Abadal, ETH Zurich, 2015 Towards continuous wave Rydberg … pickerel creek map
Josephson bifurcation amplifier: Amplifying quantum signals using …
NettetJosephson junction based parametric amplifiers are used to read out the state of superconducting qubits with high fidelity. These amplifiers are themselves supe … NettetQuantum Device Lab NettetThis thesis theoretically and experimentally studies the method of quantum-limited Josephson parametric amplification for improving such microwave measurements. A theoretical analysis of parametric amplification with a nonlinear quantum oscillator is given, along with an analysis of a particular implementation with a superconducting … pickerel electric pickerel wi