Floquet-Mode Traveling-Wave Parametric Amplifiers
- URL: http://arxiv.org/abs/2104.08269v2
- Date: Wed, 13 Apr 2022 04:52:20 GMT
- Title: Floquet-Mode Traveling-Wave Parametric Amplifiers
- Authors: Kaidong Peng, Mahdi Naghiloo, Jennifer Wang, Gregory D Cunningham,
Yufeng Ye, Kevin P O'Brien
- Abstract summary: 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.
- Score: 2.691339855008848
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: 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.
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