Floquet-Mode Traveling-Wave Parametric Amplifiers
| Autor: | Peng, Kaidong, Naghiloo, Mahdi, Wang, Jennifer, Cunningham, Gregory D, Ye, Yufeng, O'Brien, Kevin P |
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| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | PRX Quantum 3, 020306 (2022) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PRXQuantum.3.020306 |
| Popis: | Simultaneous ideal quantum measurements of multiple single-photon-level signals would advance applications in quantum information processing, metrology, and astronomy, but require the first amplifier to be simultaneously broadband, quantum limited, and directional. However, conventional traveling-wave parametric amplifiers support broadband amplification at the cost of increased added noise and are not genuinely directional due to non-negligible nonlinear backward wave generation. In this work, we introduce a new class of amplifiers which encode the information in the Floquet modes of the system. Such Floquet mode amplifiers prevent information leakage and overcome the trade-off between quantum efficiency (QE) and bandwidth. Crucially, Floquet mode amplifiers strongly suppress the nonlinear forward-backward wave coupling and are therefore genuinely directional and readily integrable with qubits, clearing another major obstacle towards broadband ideal quantum measurements. Furthermore, Floquet mode amplifiers are insensitive to out-of-band impedance mismatch, which otherwise may lead to gain ripples, parametric oscillations, and instability in conventional traveling-wave parametric amplifiers. Finally, we show that a Floquet mode Josephson traveling-wave parametric amplifier implementation can simultaneously achieve $>\!20\,$dB gain and a QE of $\eta/\eta_{\mathrm{ideal}}\!> 99.9\%$ of the quantum limit over more than an octave of bandwidth. The proposed Floquet scheme is also widely applicable to other platforms, such as kinetic inductance traveling-wave amplifiers and optical parametric amplifiers. Comment: 20 pages, 12 figures, appendices |
| Databáze: | arXiv |
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