Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Acta Physica Sinica

Research on the generation of broadband squeezed light fields based on the magnetostrictive effect

Ma Huifang, Dengfeng Li, LIU Yu, XIA Huarong, Yuming Sun, TAN Shuai

Published Jan 1, 2026• 0 citations
Publisher

Abstract

本文提出了一种在腔光磁机械系统中产生宽带压缩光输出场的新机制。在该系统中，钇铁石榴石晶体中的磁振子（机械）模式通过磁偶极（辐射压力）相互作用耦合到微波场（光场）。微桥结构的钇铁石榴石晶体诱导的磁致伸缩力产生机械位移，并形成正交压缩的磁振子模式。最终，这种正交压缩的机械模式通过状态交换相互作用转移到输出光场中。在最佳参数范围内，获得具有宽带宽的稳定压缩光输出场。此外，该压缩光场对环境温度表现出强烈的鲁棒性，并在\omega \simeq 0.65 \omega_b附近表现出最佳的鲁棒性，输出场的噪声谱密度为4.2 dB。本文提出的宽带压缩光场制备方案在量子精密测量、量子无线网络及量子雷达等领域具有潜在应用。

DOI
10.7498/aps.75.20260507

Related papers

Research on experimental scheme based on non-critical squeezed light field detection

中国科学院国家授时中心,, 西安交通大学理学院,, 山西大学光电研究所,

压缩态光场作为一种重要的量子光源，在量子计算、量子通信、精密测量等领域有广泛的应用前景。在非临界压缩光场产生的理论预测中，阈值以上泵浦的简并光学参量振荡器（DOPO）产生横向空间分布为一阶厄米高斯模式的非临界压缩光场，具有对泵浦光功率波动鲁棒性的量子特性，因此在实验中具有重要的应用价值。然而该非临界压缩光场的横向幅角随机旋转，导致无法利用本底探针光对其压缩特性进行稳定的平衡零拍实验探测。本文提出利用DOPO同时产生的与压缩光场空间正交的明亮光场作为本底探针光的实验探测方案。理论分析表明，该方案虽然引入了真空噪声，但可以很好抵消压缩光场的空间模式随机旋转引入的探测输出动态波动，得到3dB的稳定探测结果，且对本底探针光的相位波动具有鲁棒性。因此该探测方案对于非临界压缩光场的实验研究具有重要的实用价值。

Acta Physica Sinica•Jan 1, 2021•0 citations

Broadband squeezed light field by magnetostriction in an opto-magnomechanical

Ke Di, Shuai Tan, Anyu Cheng +3 more

We present a novel mechanism for generating a wide bandwidth squeezed optical output field in an opto-magnomechanical system. In this system, the magnon (mechanical) mode in the yttrium-iron-garnet crystal is coupled to the microwave field (optical field) through magnetic dipole (radiation pressure) interaction. The magnetostrictive force induced by the yttrium-iron-garnet crystal causes a mechanical displacement and creates a quadrature squeezed magnon mode. Eventually, this quadrature squeezed mechanical mode is transferred to the output optical field through state-swap interaction. Our results demonstrate the optimal parameter range for obtaining a stable squeezed optical output field with a wide bandwidth. Moreover, the squeezed light field exhibits strong robustness to environmental temperature. The new scheme we propose has potential applications in quantum precision measurements, quantum wireless networks, quantum radar, etc.

arXiv:2402.04983•Feb 7, 2024•0 citations

Experimental characterisation of a broadband multimode squeezed light source in the high gain regime

Gil Triginer, Mihai D. Vidrighin, A. Eckstein +3 more

Summary form only given. Recent advances in the design of broadband parametric down-conversion (PDC) sources have opened the possibility to attain a regime of high squeezing previously unacessible in the pulsed domain [1]. However, characterising a PDC source is a challenging task when multiple spectral modes are being squeezed simultaneously and one wants to determine the number of squeezers and their relative strengths. Moreover, as one approaches the high squeezing regime, a number of nonlinear effects that are not usually considered when the source is operated at low pump power become relevant [2, 3].Here we present a technique to perform a complete and self-referenced characterisation of a broadband PDC source using only classical measurements. Often, PDC sources are described by their joint spectral amplitude, which conveys the frequency correlations between the generated photons. Our method complements the information contained in the joint spectrum with a measurement of a second-order process that to our knowledge has not been directly measured until now. Generally, a PDC process can be described as a Bogoliuvov transformation of the bosonic operators of the formaouts (ω) = f dω'Us,s(ω,ω') ains + f dω''Us,i(ω,ω'')(ain i (ω''))† for the signal and analogously for the idler mode. In our work we show that these transfer functions, Us,s(i,i) and Us,i(i,s), can be measured in the stimulated regime [4,5], by scanning the wavelength of a narrowband seed laser and performing a frequency resolved intensity measurement of the generated light.

Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)•Jun 1, 2017•0 citations

5. 4波混合によるスクイズド状態(Squeezed States)の生成の理論的研究(大阪市立大学大学院工学研究科応用物理学専攻,修士論文題目・アブストラクト(1990年度))

Yuji Iguchi

•Oct 20, 1991•0 citations

Generation of 10-dB squeezed light from a broadband waveguide optical parametric amplifier with improved phase locking method

Kazuki Hirota, Takahiro Kashiwazaki, Gyeongmin Ha +10 more

We report generation of 10.1\pm0.2-dB squeezed light from a broadband periodically poled lithium niobate (PPLN) waveguide optical parametric amplifier (OPA). Based on our previous report where a similar PPLN waveguide shows 8.3-dB squeezing [T. Kashiwazaki et al., Appl. Phys. Lett. 122, 234003 (2023)], we reduce phase fluctuations and overall optical losses in the measurement system. In particular, we introduce a novel phase detection technique that does not require tapping a part of the squeezed light to get a phase locking signal. We use a phase-detection OPA seeded by a tapped probe and pump light before a squeezer OPA. This configuration breaks the conventional trade-off between generating a phase-locking signal with high-signal-to-noise ratio and suppressing degradation of squeezing level caused by optical tapping. With all these improvements, the phase fluctuation angle is reduced from 14 mrad to 9 mrad, and the total optical loss from 12\% to 8\%. Achieving more than 10 dB of squeezing by the broadband waveguide OPA is a significant step towards realization of fault-tolerant ultra-fast universal optical quantum computation.

quant-pharXiv:2511.15082•Nov 20, 2025•1 citation

Over-8-dB squeezed light generation by a broadband waveguide optical parametric amplifier toward fault-tolerant ultra-fast quantum computers

Takahiro Kashiwazaki, Taichi Yamashima, Koji Enbutsu +6 more

We achieved continuous-wave 8.3-dB squeezed light generation using a terahertz-order-broadband waveguide optical parametric amplifier by improving a measurement setup from our previous work [T. Kashiwazaki et al., Appl. Phys. Lett. 119, 251104 (2021)], where a low-loss periodically poled lithium niobate (PPLN) waveguide had shown 6.3-dB squeezing at a 6 THz frequency. First, to improve efficiency of the squeezed light detection, we reduced effective optical loss to about 12% by removing extra optics and changing the detection method into a low-loss balanced homodyne measurement. Second, to minimize phase-locking fluctuation, we constructed a frequency-optimized phase-locking system by comprehending its frequency responses. Finally, we found optimal experimental parameters of a measurement frequency and a pump power from their dependences for the squeezing levels. The measurement frequency was decided as 11 MHz to maximize a clearance between shot and circuit noises. Furthermore, pump power was optimized as 660 mW to get higher squeezing level while suppressing anti-squeezed-noise contamination due to an imperfection of phase locking. Note that this over-8-dB squeezing is achieved without any loss-correction and circuit-noise correction. Moreover, it is shown that the squeezing level soon after our PPLN waveguide is estimated at over 10 dB, which is thought to be mainly restricted by the waveguide loss. This broadband highly squeezed light opens the possibility to realize fault-tolerant ultra-fast optical quantum computers.

arXiv:2301.12658•Applied Physics Letters•Jun 5, 2023•70 citations
本文提出了一种在腔光磁机械系统中产生宽带压缩光输出场的新机制。在该系统中，钇铁石榴石晶体中的磁振子（机械）模式通过磁偶极（辐射压力）相互作用耦合到微波场（光场）。微桥结构的钇铁石榴石晶体诱导的磁致伸缩力产生机械位移，并形成正交压缩的磁振子模式。最终，这种正交压缩的机械模式通过状态交换相互作用转移到输出光场中。在最佳参数范围内，获得具有宽带宽的稳定压缩光输出场。此外，该压缩光场对环境温度表现出强烈的鲁棒性，并在\omega \simeq 0.65 \omega_b附近表现出最佳的鲁棒性，输出场的噪声谱密度为4.2 dB。本文提出的宽带压缩光场制备方案在量子精密测量、量子无线网络及量子雷达等领域具有潜在应用。
压缩态光场作为一种重要的量子光源，在量子计算、量子通信、精密测量等领域有广泛的应用前景。在非临界压缩光场产生的理论预测中，阈值以上泵浦的简并光学参量振荡器（DOPO）产生横向空间分布为一阶厄米高斯模式的非临界压缩光场，具有对泵浦光功率波动鲁棒性的量子特性，因此在实验中具有重要的应用价值。然而该非临界压缩光场的横向幅角随机旋转，导致无法利用本底探针光对其压缩特性进行稳定的平衡零拍实验探测。本文提出利用DOPO同时产生的与压缩光场空间正交的明亮光场作为本底探针光的实验探测方案。理论分析表明，该方案虽然引入了真空噪声，但可以很好抵消压缩光场的空间模式随机旋转引入的探测输出动态波动，得到3dB的稳定探测结果，且对本底探针光的相位波动具有鲁棒性。因此该探测方案对于非临界压缩光场的实验研究具有重要的实用价值。
We present a novel mechanism for generating a wide bandwidth squeezed optical output field in an opto-magnomechanical system. In this system, the magnon (mechanical) mode in the yttrium-iron-garnet crystal is coupled to the microwave field (optical field) through magnetic dipole (radiation pressure) interaction. The magnetostrictive force induced by the yttrium-iron-garnet crystal causes a mechanical displacement and creates a quadrature squeezed magnon mode. Eventually, this quadrature squeezed mechanical mode is transferred to the output optical field through state-swap interaction. Our results demonstrate the optimal parameter range for obtaining a stable squeezed optical output field with a wide bandwidth. Moreover, the squeezed light field exhibits strong robustness to environmental temperature. The new scheme we propose has potential applications in quantum precision measurements, quantum wireless networks, quantum radar, etc.
Summary form only given. Recent advances in the design of broadband parametric down-conversion (PDC) sources have opened the possibility to attain a regime of high squeezing previously unacessible in the pulsed domain [1]. However, characterising a PDC source is a challenging task when multiple spectral modes are being squeezed simultaneously and one wants to determine the number of squeezers and their relative strengths. Moreover, as one approaches the high squeezing regime, a number of nonlinear effects that are not usually considered when the source is operated at low pump power become relevant [2, 3].Here we present a technique to perform a complete and self-referenced characterisation of a broadband PDC source using only classical measurements. Often, PDC sources are described by their joint spectral amplitude, which conveys the frequency correlations between the generated photons. Our method complements the information contained in the joint spectrum with a measurement of a second-order process that to our knowledge has not been directly measured until now. Generally, a PDC process can be described as a Bogoliuvov transformation of the bosonic operators of the formaouts (ω) = f dω'Us,s(ω,ω') ains + f dω''Us,i(ω,ω'')(ain i (ω''))† for the signal and analogously for the idler mode. In our work we show that these transfer functions, Us,s(i,i) and Us,i(i,s), can be measured in the stimulated regime [4,5], by scanning the wavelength of a narrowband seed laser and performing a frequency resolved intensity measurement of the generated light.
We report generation of 10.1\pm0.2-dB squeezed light from a broadband periodically poled lithium niobate (PPLN) waveguide optical parametric amplifier (OPA). Based on our previous report where a similar PPLN waveguide shows 8.3-dB squeezing [T. Kashiwazaki et al., Appl. Phys. Lett. 122, 234003 (2023)], we reduce phase fluctuations and overall optical losses in the measurement system. In particular, we introduce a novel phase detection technique that does not require tapping a part of the squeezed light to get a phase locking signal. We use a phase-detection OPA seeded by a tapped probe and pump light before a squeezer OPA. This configuration breaks the conventional trade-off between generating a phase-locking signal with high-signal-to-noise ratio and suppressing degradation of squeezing level caused by optical tapping. With all these improvements, the phase fluctuation angle is reduced from 14 mrad to 9 mrad, and the total optical loss from 12\% to 8\%. Achieving more than 10 dB of squeezing by the broadband waveguide OPA is a significant step towards realization of fault-tolerant ultra-fast universal optical quantum computation.
We achieved continuous-wave 8.3-dB squeezed light generation using a terahertz-order-broadband waveguide optical parametric amplifier by improving a measurement setup from our previous work [T. Kashiwazaki et al., Appl. Phys. Lett. 119, 251104 (2021)], where a low-loss periodically poled lithium niobate (PPLN) waveguide had shown 6.3-dB squeezing at a 6 THz frequency. First, to improve efficiency of the squeezed light detection, we reduced effective optical loss to about 12% by removing extra optics and changing the detection method into a low-loss balanced homodyne measurement. Second, to minimize phase-locking fluctuation, we constructed a frequency-optimized phase-locking system by comprehending its frequency responses. Finally, we found optimal experimental parameters of a measurement frequency and a pump power from their dependences for the squeezing levels. The measurement frequency was decided as 11 MHz to maximize a clearance between shot and circuit noises. Furthermore, pump power was optimized as 660 mW to get higher squeezing level while suppressing anti-squeezed-noise contamination due to an imperfection of phase locking. Note that this over-8-dB squeezing is achieved without any loss-correction and circuit-noise correction. Moreover, it is shown that the squeezing level soon after our PPLN waveguide is estimated at over 10 dB, which is thought to be mainly restricted by the waveguide loss. This broadband highly squeezed light opens the possibility to realize fault-tolerant ultra-fast optical quantum computers.