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Accelerated and Robust Generation of W State by Parametric Amplification and Inverse Hamiltonian Engineering |
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| Authors: | Shuai Liu Du Ran Yi-Hao Kang Zhi-Cheng Shi Jie Song Yan Xia |
| Affiliation: | 1. Department of Physics, Fuzhou University, Fuzhou, 350002 China Fujian Key Laboratory of Quantum Information and Quantum Optics (Fuzhou University), Fuzhou, 350116 China;2. School of Electronic Information Engineering, Yangtze Normal University, Chongqing, 408100 China Department of Electrical Engineering Physical Electronics, Tel Aviv University, Ramat Aviv, 69978 Israel;3. Department of Physics, Fuzhou University, Fuzhou, 350002 China;4. Department of Physics, Harbin Institute of Technology, Harbin, 150001 China |
| Abstract: | A scheme to realize the accelerated and robust generation of W state in a cavity quantum electrodynamics (QED) system by combining parametric amplification (PA) with inverse Hamiltonian engineering (IHE) is proposed. The atom-cavity coupling strength can be exponentially enhanced via parametrically squeezing the cavity mode, which facilitates the generation of W state. Moreover, the evolution of the system can be optimized with suppressing the populations of the intermediate states. Numerical simulations show that the scheme is fast and high-fidelity, immune to systematic parameter deviations, robust against spontaneous emission of atoms, and decay of cavities. Therefore, this scheme may provide some useful applications in entanglement generation. |
| Keywords: | inverse Hamiltonian engineering parametric amplification W states |