Standing-Wave Bogoliubov Parametric Amplifier in Multi-Tone Setup

A quantum amplifier is a device that amplifies weak signals while adding only the minimal noise permitted by the laws of quantum mechanics [1]. Standing-wave parametric amplifiers (JPAs) based on superconducting circuits are popular tools which are commonly used for amplifying weak microwave signals. Such quantum limited devices rely on the non-linearity of Josephson junctions or high kinetic inductance from disordered superconductors to amplify the signal [2]. Standing-wave parametric amplifiers present distinct advantages over traveling-wave parametric amplifiers (TWPAs) in quantum technologies, where performance of the amplifier like efficiency, noise minimization, and interference reduction are critical [2,3]. Standing-wave amplifiers achieve higher quantum efficiency than TWPAs, which typically experience increased dissipative and intermodulation losses [4]. Furthermore, Standing-wave amplifiers exhibit less risk of correlated readout errors and cross-talk compared to TWPAs, as they can be less affected by sideband issues from higher-order non-linearities. Here we present a new class of quantum limited standing-wave parametric amplifiers, known as Bogoliubov amplifiers [5], which utilize multi-tone drives in a Bose-Hubbard dimer setup [6]. ... mehrThis design allows them to operate far from the instability region, overcoming the conventional gain-bandwidth trade-off. These characteristics make standing-wave parametric amplifiers ideal for precision quantum applications, including sensing and readout in quantum computing and metrology.
[1] C. M. Caves, Phys. Rev. D, 26, 8 (1982)
[2] P. Winkel et al., Phys. Rev. Applied 13, 024015 (2020)
[3]R. Kaufman et al., Phys. Rev. Applied 20 (2023)
[4] T. White et al., Applied Physics Letters 122 (2023)
[5] A. Metelmann et al., arXiv 2208.00024 (2022)
[6] N. Zapata et al., arXiv 2403.10669 (2024)