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学者姓名：吴怀志
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Abstract ：
In this paper, we propose an optomechanical scheme for generating mechanical squeezing over the 3 dB limit, with the mechanical mirror being driven by a strong and linear harmonic force. In contrast to parametric mechanical driving, the linearly driven force shakes the mechanical mirror periodically oscillating at twice the mechanical eigenfrequency with large amplitude, where the mechanical mirror can be dissipatively stabilized by the engineered cavity reservoir to a dynamical squeezed steady state with a maximum degree of squeezing over 8 dB. The mechanical squeezing of more than 3 dB can be achieved even for a mechanical thermal temperature larger than 100 mK. The scheme can be implemented in a cascaded optomechanical setup, with potential applications in engineering continuous variable entanglement and quantum sensing.
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| GB/T 7714 | Lin, Xin-yu , Ye, Guang-zheng , Liu, Ye et al. Optomechanical squeezing with strong harmonic mechanical driving [J]. | OPTICS EXPRESS , 2024 , 32 (6) . |
| MLA | Lin, Xin-yu et al. "Optomechanical squeezing with strong harmonic mechanical driving" . | OPTICS EXPRESS 32 . 6 (2024) . |
| APA | Lin, Xin-yu , Ye, Guang-zheng , Liu, Ye , Jiang, Yun-kun , Wu, Huaizhi . Optomechanical squeezing with strong harmonic mechanical driving . | OPTICS EXPRESS , 2024 , 32 (6) . |
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Understanding the dynamical behavior of a qubit in a reservoir is critical to applications in quantum technological protocols, ranging from quantum computation to quantum metrology. The effect of the reservoir depends on the reservoir's spectral structure as well as on the qubit-reservoir coupling strength. We here propose a measure for quantifying the non-Markovian effect of a reservoir with a Lorentzian spectrum, based on the maximum qubit-reservoir quantum entanglement that can be extracted. Numerical simulation shows that this entanglement exhibits a monotonous behavior in response to the variation of the coupling strength. We confirm the validity of this measure with an experiment where a superconducting qubit is controllably coupled to a lossy resonator, which acts as a reservoir for the qubit. The experimental results illustrate that the maximal extractable entanglement is progressively increased with the strengthening of non-Markovianity. © 2024 Author(s).
Keyword ：
Petroleum reservoir evaluation Petroleum reservoir evaluation Quantum electronics Quantum electronics Quantum entanglement Quantum entanglement Quantum optics Quantum optics Qubits Qubits Superconducting resonators Superconducting resonators
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| GB/T 7714 | Han, Pei-Rong , Wu, Fan , Huang, Xin-Jie et al. Characterization of non-Markovianity with maximal extractable qubit-reservoir entanglement [J]. | Applied Physics Letters , 2024 , 125 (12) . |
| MLA | Han, Pei-Rong et al. "Characterization of non-Markovianity with maximal extractable qubit-reservoir entanglement" . | Applied Physics Letters 125 . 12 (2024) . |
| APA | Han, Pei-Rong , Wu, Fan , Huang, Xin-Jie , Wu, Huai-Zhi , Yi, Wei , Wen, Jianming et al. Characterization of non-Markovianity with maximal extractable qubit-reservoir entanglement . | Applied Physics Letters , 2024 , 125 (12) . |
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We propose a scheme for realizing nonreciprocal microwave photon routing with two cascaded magnon-cavity coupled systems, which work around the exceptional points of a parity-time (PT)-symmetric Hamiltonian. An almost perfect nonreciprocal transmission can be achieved with a broad bandwidth, where the transmission for a forward-propagating photon can be flexibly controlled with the backpropagating photon being isolated. The transmission or isolated direction can be reversed via simply controlling the magnetic field direction applied to the magnons. The isolation bandwidth is improved by almost three times in comparison with the device based on a single PT-symmetric system. Moreover, the effect of intrinsic cavity loss and added thermal noises is considered, confirming the experimental feasibility of the nonreciprocal device and potential applications in quantum information processing. © 2024 Optica Publishing Group. All rights, including for text and data mining (TDM), Artificial Intelligence (AI) training, and similar technologies, are reserved.
Keyword ：
Bandwidth Bandwidth Data mining Data mining Hamiltonians Hamiltonians Photons Photons Quantum optics Quantum optics Transmissions Transmissions
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| GB/T 7714 | Yang, Tian-Le , Ye, Guang-Zheng , Su, Wan-Jun et al. Nonreciprocal routing of microwave photons with broad bandwidth via magnon-cavity chiral coupling [J]. | Optics Letters , 2024 , 49 (13) : 3781-3784 . |
| MLA | Yang, Tian-Le et al. "Nonreciprocal routing of microwave photons with broad bandwidth via magnon-cavity chiral coupling" . | Optics Letters 49 . 13 (2024) : 3781-3784 . |
| APA | Yang, Tian-Le , Ye, Guang-Zheng , Su, Wan-Jun , Wu, Huaizhi . Nonreciprocal routing of microwave photons with broad bandwidth via magnon-cavity chiral coupling . | Optics Letters , 2024 , 49 (13) , 3781-3784 . |
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We study single-photon scattering spectra of a giant atom chirally coupled to a one-dimensional waveguide at multiple connection points, and examine chirality-induced effects in the scattering spectra. We show that the transmission spectra typically possess an anti-Lorentzian lineshape with a nonzero minimum, but by engineering the chirality of the multipoint coupling, the transmission spectrum of an incident photon can undergo a transition from complete transmission to total reflection at multiple frequency 'windows,'where the width of the anti-Lorentzian lineshape for each of the window can be flexibly tuned at a fixed frequency detuning. Moreover, we show that a perfect nonreciprocal photon scattering can be achieved due to the interplay between internal atomic spontaneous emission and the chirally external decay to the waveguide, in contrast to that induced by the non-Markovian retardation effect. We also consider the non-Markovian retardation effect on the scattering spectra, which allows for a photonic band gap even with only two chiral coupling points. The giant-atom-waveguide system with chiral coupling is a promising candidate for realizing single-photon routers with multiple channels. © 2024 American Physical Society.
Keyword ：
Atoms Atoms Chirality Chirality Energy gap Energy gap Particle beams Particle beams Photonic band gap Photonic band gap Photons Photons Transmissions Transmissions Waveguides Waveguides
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| GB/T 7714 | Li, Shu-Yu , Zhang, Ze-Quan , Du, Lei et al. Single-photon scattering in giant-atom waveguide systems with chiral coupling [J]. | Physical Review A , 2024 , 109 (6) . |
| MLA | Li, Shu-Yu et al. "Single-photon scattering in giant-atom waveguide systems with chiral coupling" . | Physical Review A 109 . 6 (2024) . |
| APA | Li, Shu-Yu , Zhang, Ze-Quan , Du, Lei , Li, Yong , Wu, Huaizhi . Single-photon scattering in giant-atom waveguide systems with chiral coupling . | Physical Review A , 2024 , 109 (6) . |
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Abstract ：
人造巨原子与波导多点耦合系统可打破传统量子光学偶极近似，诱导原子自干涉效应，近年来成为研究光子散射的重要物理平台。本文研究了该模型与一维波导多点手性耦合时，耦合点局域相位对单光子散射的影响。通过实空间哈密顿量方法精准解得系统的透射率与反射率表达式，传播相位被修正为依赖于入射光传播方向的手性相位，并通过设计手性相位来研究散射谱中手性引起的效应。研究发现当手性相位满足与耦合点个数无关的条件时，可使得兰姆能移消失，入射光子的透射谱能在共振处实现完美透射到完全反射的转变。此外，本文展现了引入原子内部自发辐射后，无需利用非马尔可夫延迟效应，仅调控手性相位即可实现完美的非互易光子散射。本文研究表明具有手性耦合点局域相位的巨原子-波导系统能为实现单光子路由提供颇具前景的候选平台。
Keyword ：
单光子散射 单光子散射 原子自干涉效应 原子自干涉效应 巨原子 巨原子 手性耦合 手性耦合 波导量子电动力学 波导量子电动力学
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| GB/T 7714 | 李姝瑜 , 吴怀志 , 韩亚帅 et al. 基于局域耦合相位调控的巨原子单光子散射 [J]. | 量子光学学报 , 2024 , 30 (02) : 24-35 . |
| MLA | 李姝瑜 et al. "基于局域耦合相位调控的巨原子单光子散射" . | 量子光学学报 30 . 02 (2024) : 24-35 . |
| APA | 李姝瑜 , 吴怀志 , 韩亚帅 , 胡长生 . 基于局域耦合相位调控的巨原子单光子散射 . | 量子光学学报 , 2024 , 30 (02) , 24-35 . |
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We study the enhanced sensing of optomechanically induced nonlinearity (OMIN) in a cavity-waveguide coupled system. The Hamiltonian of the system is anti-PT symmetric, with the two involved cavities being dissipatively coupled via the waveguide. The anti-PT symmetry may break down when a weak waveguide-mediated coherent coupling is introduced. However, we find a strong bistable response of the cavity intensity to the OMIN near the cavity resonance, benefiting from linewidth suppression caused by the vacuum induced coherence. The joint effect of optical bistability and the linewidth suppression is inaccessible by the anti-PT symmetric system involving only dissipative coupling. Due to that, the sensitivity measured by an enhancement factor is greatly enhanced by two orders of magnitude compared to that for the anti-PT symmetric model. Moreover, the enhancement factor shows resistance to a reasonably large cavity decay and robustness to fluctuations in the cavity-waveguide detuning. Based on the integrated optomechanical cavity-waveguide systems, the scheme can be used for sensing different physical quantities related to the single-photon coupling strength and has potential applications in high-precision measurements with systems involving Kerr-type nonlinearity.
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| GB/T 7714 | Liu, Chun-Wang , Liu, Ye , Du, Lei et al. Enhanced sensing of optomechanically induced nonlinearity by linewidth suppression and optical bistability in cavity-waveguide systems [J]. | OPTICS EXPRESS , 2023 , 31 (6) : 9236-9250 . |
| MLA | Liu, Chun-Wang et al. "Enhanced sensing of optomechanically induced nonlinearity by linewidth suppression and optical bistability in cavity-waveguide systems" . | OPTICS EXPRESS 31 . 6 (2023) : 9236-9250 . |
| APA | Liu, Chun-Wang , Liu, Ye , Du, Lei , Su, Wan-Jun , Wu, Huaizhi , Li, Yong . Enhanced sensing of optomechanically induced nonlinearity by linewidth suppression and optical bistability in cavity-waveguide systems . | OPTICS EXPRESS , 2023 , 31 (6) , 9236-9250 . |
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Time periodic driving can serve as synthetic gauge fields and plays a key role in simulating dynamical topological materials. The periodically driven systems, where different spins (or sublattices) are engaged in the different dynamical driving processes are investigated. It is demonstrated that spin-dependent time-periodical periodic driving can result in shifted topological edge modes with non-zero (nor +/- omega/2) quasi-energies. Such shifted topological edge modes are not only related to the spin imbalance at each instantaneous time, but also the details of the dynamical driving. Here, it is also illustrated that the spin-dependent time-periodical driving can be conceived as the time-spin coupling, and similar to the static spatial spin-orbit coupling, tuning time-spin coupling parameters can lead to topological phase transitions. Experimental simulations on the spin-dependent time-periodic driving are proposed by shaking optical super-lattices and Raman assisted tunneling.
Keyword ：
shifted edge modes shifted edge modes spin-dependent time-periodic driving spin-dependent time-periodic driving topological phase transitions topological phase transitions
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| GB/T 7714 | Wang, Huan-Yu , Wu, Huai-Zhi , Zhao, Erhai et al. Inducing Shifted Edge Modes by the Spin-Dependent Time-Periodical Driving and the Corresponding Topological Phase Transitions [J]. | ADVANCED QUANTUM TECHNOLOGIES , 2023 , 6 (6) . |
| MLA | Wang, Huan-Yu et al. "Inducing Shifted Edge Modes by the Spin-Dependent Time-Periodical Driving and the Corresponding Topological Phase Transitions" . | ADVANCED QUANTUM TECHNOLOGIES 6 . 6 (2023) . |
| APA | Wang, Huan-Yu , Wu, Huai-Zhi , Zhao, Erhai , Wang, Ru-Quan , Wang, Xun-Gao , Liu, Wu-Ming . Inducing Shifted Edge Modes by the Spin-Dependent Time-Periodical Driving and the Corresponding Topological Phase Transitions . | ADVANCED QUANTUM TECHNOLOGIES , 2023 , 6 (6) . |
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In this paper, we study static bistability and mechanical cooling of a dissipative optomechanical cavity filled with a Kerr medium. The system exhibits optical bistability for a wide input-power range with the power threshold being greatly reduced, in contrast to the case of purely dissipative coupling. At the bistable regime, the membrane can be effectively cooled down to a few millikelvin from the room temperature under the unresolved sideband condition, where the effective mechanical temperature is a nonmonotonic function of intracavity intensity and reaches its minimum near the turning point of the upper stable branch. When the system is in the cryogenics environment, the effective mechanical temperature at the bistable regime shows a similar feature as in the room temperature case, but the optimal cooling appears at the monostable regime and approaches the mechanical ground state. Our results are of interest for further understanding bistable optomechanical systems, which have many applications in nonclassical state preparations and quantum information processing.
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| GB/T 7714 | Liu, Ye , Liu, Yang , Hu, Chang-Sheng et al. Mechanical cooling in the bistable regime of a dissipative optomechanical cavity with a Kerr medium [J]. | PHYSICAL REVIEW A , 2023 , 108 (2) . |
| MLA | Liu, Ye et al. "Mechanical cooling in the bistable regime of a dissipative optomechanical cavity with a Kerr medium" . | PHYSICAL REVIEW A 108 . 2 (2023) . |
| APA | Liu, Ye , Liu, Yang , Hu, Chang-Sheng , Jiang, Yun-Kun , Wu, Huaizhi , Li, Yong . Mechanical cooling in the bistable regime of a dissipative optomechanical cavity with a Kerr medium . | PHYSICAL REVIEW A , 2023 , 108 (2) . |
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Non-Hermitian (NH) extension of quantum-mechanical Hamiltonians represents one of the most significant advancements in physics. During the past two decades, numerous captivating NH phenomena have been revealed and demonstrated, but all of which can appear in both quantum and classical systems. This leads to the fundamental question: what NH signature presents a radical departure from classical physics? The solution of this problem is indispensable for exploring genuine NH quantum mechanics, but remains experimentally untouched so far. Here, we resolve this basic issue by unveiling distinct exceptional entanglement phenomena, exemplified by an entanglement transition, occurring at the exceptional point of NH interacting quantum systems. We illustrate and demonstrate such purely quantum-mechanical NH effects with a naturally dissipative light-matter system, engineered in a circuit quantum electrodynamics architecture. Our results lay the foundation for studies of genuinely quantum-mechanical NH physics, signified by exceptional-point-enabled entanglement behaviors.
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| GB/T 7714 | Han, Pei-Rong , Wu, Fan , Huang, Xin-Jie et al. Exceptional Entanglement Phenomena: Non-Hermiticity Meeting Nonclassicality [J]. | PHYSICAL REVIEW LETTERS , 2023 , 131 (26) . |
| MLA | Han, Pei-Rong et al. "Exceptional Entanglement Phenomena: Non-Hermiticity Meeting Nonclassicality" . | PHYSICAL REVIEW LETTERS 131 . 26 (2023) . |
| APA | Han, Pei-Rong , Wu, Fan , Huang, Xin-Jie , Wu, Huai-Zhi , Zou, Chang-Ling , Yi, Wei et al. Exceptional Entanglement Phenomena: Non-Hermiticity Meeting Nonclassicality . | PHYSICAL REVIEW LETTERS , 2023 , 131 (26) . |
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We propose a Rydberg molecule dressing scheme to create strong and long-ranged interactions at selective distances. This is achieved through laser coupling ground-state atoms off-resonantly to an attractive molecular curve of two interacting Rydberg atoms. Although dephasing due to Rydberg state decay occurs in all dressing schemes, an advantage of the molecule dressing is that a large ratio of dressed interaction to dephasing rate can be realized at large atomic separations. In an optical lattice or tweezer setting, we show that the strong interaction permits the fast generation of spin squeezing for several tens of dressed atoms. The proposed setting offers a new route to study complex many-body dynamics and to realize quantum information processing with non-convex long-range interactions.
Keyword ：
Rydberg atoms Rydberg atoms Rydberg molecule dressing Rydberg molecule dressing spin squeezing spin squeezing
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| GB/T 7714 | Wu, Huaizhi , Lin, Xin-Yu , Ding, Zong-Xing et al. Fast spin squeezing by distance-selective long-range interactions with Rydberg molecule dressing [J]. | SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY , 2022 , 65 (8) . |
| MLA | Wu, Huaizhi et al. "Fast spin squeezing by distance-selective long-range interactions with Rydberg molecule dressing" . | SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY 65 . 8 (2022) . |
| APA | Wu, Huaizhi , Lin, Xin-Yu , Ding, Zong-Xing , Zheng, Shi-Biao , Lesanovsky, Igor , Li, Weibin . Fast spin squeezing by distance-selective long-range interactions with Rydberg molecule dressing . | SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY , 2022 , 65 (8) . |
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