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学者姓名：苏万钧
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Abstract ：
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 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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We propose a scheme to achieve nuclear-nuclear indirect interactions mediated by a mechanically driven nitrogen-vacancy (NV) center in a diamond. Here we demonstrate two-qubit entangling gates and quantum-state transfer between two carbon nuclei. When the dipole-dipole interaction strength is much larger than the driving field strength, the scheme is robust against decoherence caused by coupling between the NV center (nuclear spins) and the environment. Conveniently, precise control of dipole coupling is not required so this scheme is insensitive to fluctuating positions of the nuclear spins and the NV center. Our scheme provides a general blueprint for multi-nuclear-spin gates and for multi-party communication.
Keyword ：
dipole-dipole interaction dipole-dipole interaction mechanically control mechanically control NV center NV center quantum Zeno effect quantum Zeno effect
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| GB/T 7714 | Su, Wan-Jun , Ye, Guang-Zheng . Quantum information processing with nuclear spins mediated by a weak-mechanically controlled electron spin [J]. | COMMUNICATIONS IN THEORETICAL PHYSICS , 2022 , 74 (5) . |
| MLA | Su, Wan-Jun et al. "Quantum information processing with nuclear spins mediated by a weak-mechanically controlled electron spin" . | COMMUNICATIONS IN THEORETICAL PHYSICS 74 . 5 (2022) . |
| APA | Su, Wan-Jun , Ye, Guang-Zheng . Quantum information processing with nuclear spins mediated by a weak-mechanically controlled electron spin . | COMMUNICATIONS IN THEORETICAL PHYSICS , 2022 , 74 (5) . |
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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 study reservoir-engineered entanglement for a cascaded bosonic system consisting of three modes, where the adjacent pairs couple to each other via both the beam-splitter interaction and the coherent parametric interaction with the interaction strengths being tunable. We focus on an optomechanical realization of the model by combining a nondegenerate parametric amplifier and an auxiliary cavity. A great steady-state cavity-mechanical entanglement can be achieved by optimizing the ratio of the interaction strengths, where the optomechanical cavity enacts the cold reservoir, simultaneously laser cooling the pair of hybrid modes delocalized over the auxiliary cavity and the mechanical oscillator. In comparison with the case of cooling a single delocalized mode, the dual-mode cooling approach allows one to obtain a greater amount of entanglement with higher cooling efficiencies and to explore strong entanglement in much broader parameter regions, where the rotating-wave approximation fails for the single-mode cooling case. Moreover, we show that the steady-state cavity-mechanical entanglement is robust to the mechanical thermal noise of the high temperature. The improved reservoir engineering approach can potentially be generalized to other bosonic systems with asymmetric beam-splitter and parametric interactions.
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| GB/T 7714 | Liu, Zhi-Qiang , Hu, Chang-Sheng , Jiang, Yun-Kun et al. Engineering optomechanical entanglement via dual-mode cooling with a single reservoir [J]. | PHYSICAL REVIEW A , 2021 , 103 (2) . |
| MLA | Liu, Zhi-Qiang et al. "Engineering optomechanical entanglement via dual-mode cooling with a single reservoir" . | PHYSICAL REVIEW A 103 . 2 (2021) . |
| APA | Liu, Zhi-Qiang , Hu, Chang-Sheng , Jiang, Yun-Kun , Su, Wan-Jun , Wu, Huaizhi , Li, Yong et al. Engineering optomechanical entanglement via dual-mode cooling with a single reservoir . | PHYSICAL REVIEW A , 2021 , 103 (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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We report an efficient mechanism to generate mechanical entanglement in a two-cascaded cavity optomechanical system with optical parametric amplifiers (OPAs) inside the two coupled cavities. We use the especially tuned OPAs to squeeze the hybrid mode composed of two mechanical modes, leading to strong macroscopic entanglement between the two movable mirrors. The squeezing parameter as well as the effective mechanical damping are both modulated by the OPA gains. The optimal degree of mechanical entanglement therefore depends on the balanced process between coherent hybrid mode squeezing and dissipation engineering. The mechanical entanglement is robust to strong cavity decay, going beyond simply resolved sideband regime, and is resistant to reasonable high thermal noise. The scheme provides an alternative way for generating strong macroscopic entanglement in cascaded optomechanical systems. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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| GB/T 7714 | Hu, Chang-Sheng , Lin, Xin-Yu , Shen, Li-Tuo et al. Improving macroscopic entanglement with nonlocal mechanical squeezing [J]. | OPTICS EXPRESS , 2020 , 28 (2) : 1492-1506 . |
| MLA | Hu, Chang-Sheng et al. "Improving macroscopic entanglement with nonlocal mechanical squeezing" . | OPTICS EXPRESS 28 . 2 (2020) : 1492-1506 . |
| APA | Hu, Chang-Sheng , Lin, Xin-Yu , Shen, Li-Tuo , Su, Wan-Jun , Jiang, Yun-Kun , Wu, Huaizhi et al. Improving macroscopic entanglement with nonlocal mechanical squeezing . | OPTICS EXPRESS , 2020 , 28 (2) , 1492-1506 . |
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In this paper, we show that multi-phonon NOON states can be generated in a two-dimensional anisotropic trapped-ion system. In the proposal, two laser pulses are applied to an ion along different directions in the ion trap plane to exchange the information between the external and internal states of the ion. Different from the previous frameworks, the proposal is outside the Lamb-Dicke regime. The distinct advantage of the proposed scheme is that the entanglement generation is deterministic and no measurement on the system is required. Numerical simulations show that the fidelity of the prepared entangled states is strongly affected by Lamb-Dicke parameters.
Keyword ：
Entanglement generation Entanglement generation NOON states NOON states Trapped ion Trapped ion
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| GB/T 7714 | Huang, Xin-Jie , Chen, Lei , Su, Wan-Jun et al. NOON state generation beyond the Lamb-Dicke limit in trapped-ion systems [J]. | QUANTUM INFORMATION PROCESSING , 2020 , 19 (11) . |
| MLA | Huang, Xin-Jie et al. "NOON state generation beyond the Lamb-Dicke limit in trapped-ion systems" . | QUANTUM INFORMATION PROCESSING 19 . 11 (2020) . |
| APA | Huang, Xin-Jie , Chen, Lei , Su, Wan-Jun , Zhong, Zhi-Rong . NOON state generation beyond the Lamb-Dicke limit in trapped-ion systems . | QUANTUM INFORMATION PROCESSING , 2020 , 19 (11) . |
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We propose an effective scheme for realizing a Jaynes-Cummings model with the collective nitrogen-vacancycenter ensemble (NVE) bosonic modes in a hybrid system. Specifically, the controllable transmon qubit can alternatively interact with one of the two NVEs, which results in the production of N-particle entangled states. Arbitrary N-particle entangled states, NOON states, N-dimensional entangled states, and entangled coherent states are demonstrated. Realistic imperfections and decoherence effects are analyzed via numerical simulation. Since no cavity photons or excited levels of the NV center are populated during the whole process, our scheme is insensitive to cavity decay and the spin dephasing effect of the NVE. The idea provides a scalable way to realize NVE-circuit cavity quantum information processing with current technology.
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| GB/T 7714 | Su, Wan-Jun , Yang, Zhen-Biao , Zhong, Zhi-Rong . Arbitrary control of entanglement between two nitrogen-vacancy-center ensembles coupling to a superconducting-circuit qubit [J]. | PHYSICAL REVIEW A , 2018 , 97 (1) . |
| MLA | Su, Wan-Jun et al. "Arbitrary control of entanglement between two nitrogen-vacancy-center ensembles coupling to a superconducting-circuit qubit" . | PHYSICAL REVIEW A 97 . 1 (2018) . |
| APA | Su, Wan-Jun , Yang, Zhen-Biao , Zhong, Zhi-Rong . Arbitrary control of entanglement between two nitrogen-vacancy-center ensembles coupling to a superconducting-circuit qubit . | PHYSICAL REVIEW A , 2018 , 97 (1) . |
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We propose a scheme to realize the quantum state transfer (QST) and conditional phase gate (CPG) between two qubits (acted by nitrogen-vacancy (NV) centers) based on off-resonant quantum Zeno dynamics. We also consider the entanglement dynamics of two qubits in this system. Since no cavity photons or excited levels of the NV center is populated during the whole process, the scheme is immune to the decay of cavity and spontaneous emission of the NV center. The strictly numerical simulation shows that the fidelities of QST and CPG are high even in the presence of realistic imperfections. (C) 2016 Elsevier B.V. All rights reserved.
Keyword ：
N-V center N-V center Phase gate Phase gate Quantum Zeno effect Quantum Zeno effect
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| GB/T 7714 | Su, Wan-Jun , Yang, Zhen-Biao , Wu, Huai-Zhi . Quantum state transfer and conditional phase gate via off-resonant quantum Zeno dynamics [J]. | OPTICS COMMUNICATIONS , 2017 , 383 : 101-106 . |
| MLA | Su, Wan-Jun et al. "Quantum state transfer and conditional phase gate via off-resonant quantum Zeno dynamics" . | OPTICS COMMUNICATIONS 383 (2017) : 101-106 . |
| APA | Su, Wan-Jun , Yang, Zhen-Biao , Wu, Huai-Zhi . Quantum state transfer and conditional phase gate via off-resonant quantum Zeno dynamics . | OPTICS COMMUNICATIONS , 2017 , 383 , 101-106 . |
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