Single-Mode Squeezing Using Degenerate Four-Wave Mixing in a Dual-Pump TWPA
Abstract
Single-mode squeezing of the electromagnetic vacuum is a key resource for mode-selective noise reduction in quantum measurements. At microwave frequencies, single-mode squeezing is typically obtained by using Josephson and Traveling-Wave Parametric Amplifiers designed for three-wave mixing operation. In single-pump degenerate four-wave mixing, the coincidence of pump, signal, and idler frequencies complicates separation of the squeezed field from the strong pump. A dual-pump configuration enables degenerate operation while keeping both pumps spectrally separated from the squeezed mode. Here, we demonstrate single-mode squeezing in a flux-tunable, dual-pump Traveling-Wave Parametric Amplifier, employing reversed-Kerr phase matching. By independently calibrating the single-pump gains, we find that the strongest squeezing occurs along approximately balanced-gain trajectories, while the optimal squeezing does not necessarily correspond to the highest dual-pump gain. At flux biases Φext/Φ0 = 0.0 and $0.5$, the minimum quadrature noise levels reach −2.48 ± 0.18 dB and −1.62 ± 0.20 dB relative to vacuum, respectively. These results establish the proposed architecture as a platform for single-mode squeezing in microwave continuous-variable quantum technologies.
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BibTeX
@misc{levochkina2026singlemode,
title = {{Single-Mode Squeezing Using Degenerate Four-Wave Mixing in a Dual-Pump TWPA}},
author = {Anna Levochkina and Kirill Petrovnin and Iiro Harju and Jiaming Wang and Gheorghe Sorin Paraoanu},
howpublished = {arXiv},
year = {2026},
month = nov,
doi = {10.48550/arxiv.2611.00934},
eprint = {2611.00934},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2611.00934},
}
RIS
TY - UNPB
TI - Single-Mode Squeezing Using Degenerate Four-Wave Mixing in a Dual-Pump TWPA
AU - Anna Levochkina
AU - Kirill Petrovnin
AU - Iiro Harju
AU - Jiaming Wang
AU - Gheorghe Sorin Paraoanu
PY - 2026
DA - 2026/11/01
PB - arXiv
DO - 10.48550/arxiv.2611.00934
UR - https://arxiv.org/abs/2611.00934
AB - Single-mode squeezing of the electromagnetic vacuum is a key resource for mode-selective noise reduction in quantum measurements. At microwave frequencies, single-mode squeezing is typically obtained by using Josephson and Traveling-Wave Parametric Amplifiers designed for three-wave mixing operation. In single-pump degenerate four-wave mixing, the coincidence of pump, signal, and idler frequencies complicates separation of the squeezed field from the strong pump. A dual-pump configuration enables degenerate operation while keeping both pumps spectrally separated from the squeezed mode. Here, we demonstrate single-mode squeezing in a flux-tunable, dual-pump Traveling-Wave Parametric Amplifier, employing reversed-Kerr phase matching. By independently calibrating the single-pump gains, we find that the strongest squeezing occurs along approximately balanced-gain trajectories, while the optimal squeezing does not necessarily correspond to the highest dual-pump gain. At flux biases Φ_ext/Φ_0 = 0.0 and $0.5$, the minimum quadrature noise levels reach −2.48 ± 0.18 dB and −1.62 ± 0.20 dB relative to vacuum, respectively. These results establish the proposed architecture as a platform for single-mode squeezing in microwave continuous-variable quantum technologies.
ER -