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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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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 antiLorentzian 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 nonMarkovian 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.
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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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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.
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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. (c) 2024 Optica Publishing Group. All rights, including for text and data mining (TDM), Artificial Intelligence (AI) training, and similar technologies, are reserved.
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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 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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Non reciprocal transmission of optical or microwave signals is indispensable in various applications involving sensitive measurements. In this paper, we study optomechanically induced directional amplification and isolation in a generic setup including two cavities and two mechanical oscillators by exclusively using blue-sideband drive tones. The input and output ports defined by the two cavity modes are coupled through coherent and dissipative paths mediated by the two mechanical resonators, respectively. By choosing appropriate transfer phases and strengths of the driving fields, either a directional amplifier or an isolator can be implemented at low thermal temperature, and both of them show bi-directional nonreciprocity working at two mirrored frequencies. The nonreciprocal device can potentially be demonstrated by opto- and electromechanical setups in both optical and microwave domains. (C) 2022 Optica Publishing Group
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GB/T 7714 | Lan, Yan-Ting , Su, Wan-Jun , Wu, Huaizhi et al. Nonreciprocal light transmission via optomechanical parametric interactions [J]. | OPTICS LETTERS , 2022 , 47 (5) : 1182-1185 . |
MLA | Lan, Yan-Ting et al. "Nonreciprocal light transmission via optomechanical parametric interactions" . | OPTICS LETTERS 47 . 5 (2022) : 1182-1185 . |
APA | Lan, Yan-Ting , Su, Wan-Jun , Wu, Huaizhi , Li, Yong , Zheng, Shi-Biao . Nonreciprocal light transmission via optomechanical parametric interactions . | OPTICS LETTERS , 2022 , 47 (5) , 1182-1185 . |
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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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Quantum phase transition and quench dynamics in the Jaynes-Cummings model with squeezed light are investigated. We find a special unitary transformation that removes the nonintegrable squeezing interaction when the qubit frequency far outweighs the field frequency. The eigenenergies and the eigenstates of the normal and superradiant phases are derived analytically. We demonstrate that the system exhibits a second-order quantum phase transition at a phase-boundary-induced nonlinearly by squeezed light. This phase boundary requires neither an ultrastrong coupling regime nor multiqubits, which lessens the difficulty of the experiment. The entanglement entropy is very close to its maximum value as the squeezing strength increases in the superradiant phase. In quench dynamics, the nonlinear relation between the residual energy and the squeezing strength is obtained analytically.
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GB/T 7714 | Shen, Li-Tuo , Tang, Chun-Qi , Shi, Zhicheng et al. Squeezed-light-induced quantum phase transition in the Jaynes-Cummings model [J]. | PHYSICAL REVIEW A , 2022 , 106 (2) . |
MLA | Shen, Li-Tuo et al. "Squeezed-light-induced quantum phase transition in the Jaynes-Cummings model" . | PHYSICAL REVIEW A 106 . 2 (2022) . |
APA | Shen, Li-Tuo , Tang, Chun-Qi , Shi, Zhicheng , Wu, Huaizhi , Yang, Zhen-Biao , Zheng, Shi-Biao . Squeezed-light-induced quantum phase transition in the Jaynes-Cummings model . | PHYSICAL REVIEW A , 2022 , 106 (2) . |
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By using the Lyapunov control approach-an optimization algorithm, we propose a dissipative scheme for efficiently preparing the three-dimensional entangled state of two Rydberg atoms, which subject to Rydberg-Rydberg interactions at the antiblockade regime. The steady target state is the unique dark state of the two-atom system, and is achieved with high fidelity under the Rydberg pumping and the atomic spontaneous emission. The time required to settle into the high-fidelity steady state is greatly accelerated by the help of Lyapunov control, which takes effects while the system is initially prepared in the states containing coherence between the dark state and decoherence-sensitive bright states. The numerical results show that a fidelity of the steady three-dimensional entangled state above 0.99 can be achieved around 2.2 ms with the current experimental conditions. We study in detail the optimal control parameters and show the robustness of the scheme against random noises. The scheme may be generalized for preparation of more complicate multi-atom entangled states.
Keyword :
Lyapunov control Lyapunov control Rydberg atoms Rydberg atoms three-dimensional entangled state three-dimensional entangled state
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GB/T 7714 | Ding, Zong-Xing , Hu, Chang-Sheng , Shen, Li-Tuo et al. Fast dissipative preparation of three-dimensional entangled states for two Rydberg atoms via Lyapunov control [J]. | LASER PHYSICS LETTERS , 2021 , 18 (2) . |
MLA | Ding, Zong-Xing et al. "Fast dissipative preparation of three-dimensional entangled states for two Rydberg atoms via Lyapunov control" . | LASER PHYSICS LETTERS 18 . 2 (2021) . |
APA | Ding, Zong-Xing , Hu, Chang-Sheng , Shen, Li-Tuo , Su, Wan-Jun , Wu, Huaizhi , Zheng, Shi-Biao . Fast dissipative preparation of three-dimensional entangled states for two Rydberg atoms via Lyapunov control . | LASER PHYSICS LETTERS , 2021 , 18 (2) . |
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