Wireless Josephson Amplifier
arXiv:1404.4979 · doi:10.1063/1.4883373
Abstract
Josephson junction parametric amplifiers are playing a crucial role in the readout chain in superconducting quantum information experiments. However, their integration with current 3D cavity implementations poses the problem of transitioning between waveguide, coax cables and planar circuits. Moreover, Josephson amplifiers require auxiliary microwave components, like directional couplers and/or hybrids, that are sources of spurious losses and impedance mismatches that limit measurement efficiency and amplifier tunability. We have developed a new wireless architecture for these parametric amplifiers that eliminates superfluous microwave components and interconnects. This greatly simplifies their assembly and integration into experiments. We present an experimental realization of such a device operating in the GHz band with about MHz of amplitude gain-bandwidth product, on par with devices mounted in conventional sample holders. The simpler impedance environment presented to the amplifier also results in increased amplifier tunability.
6 pages, 4 figures
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Cited by in corpus (10)
- Robust concurrent remote entanglement between two superconducting qubits
- On-chip superconducting microwave circulator from synthetic rotation
- Cavity Attenuators for Superconducting Qubits
- High-gain weakly nonlinear flux-modulated Josephson parametric amplifier using a SQUID-array
- Gate-tunable kinetic inductance parametric amplifier
- A compact design for the Josephson mixer: the lumped element circuit
- Josephson Effect in NbS van der Waals Junctions
- Reconfigurable re-entrant cavity for wireless coupling to an electro-optomechanical device
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