首页|Nonreciprocal generation of Schr?dinger cat state induced by topology
Nonreciprocal generation of Schr?dinger cat state induced by topology
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The Schrödinger cat state produced differently in two directions is anticipated to be a critical quantum resource in quantum infor-mation technologies.By exploring the interplay between quantum nonreciprocity and topology in a one-dimensional microcavity array,we obtain the Schrödinger cat state(a pure quantum state)in a chosen direction at the edge cavity,whereas a classical state in the other direction.This nonreciprocal generation of the cat state originates from the topologically protected chirality-mode excitation in the nontrivial phase,but in the trivial phase,the nonreciprocal generation of cat state vanishes.Thus,our proposal is switchable by tuning the parameters so that a topological phase transition occurs.Moreover,the obtained cat state has nonreciprocal high fidelity,nonclassicality,and quantum coherence,which are sufficient to be used in various one-way quantum technologies,e.g.,invisible quantum sensing,noise-tolerant quantum computing,and chiral quantum networks.Our work pro-vides a general approach to control quantum nonreciprocities with the topological effect,which substantially broadens the fields of nonreciprocal photonics and topological physics.
Schrödinger cat statenonreciprocitytopology
Zi-Hao Li、Li-Li Zheng、Ying Wu、Xin-You Lü
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School of Physics and Institute for Quantum Science and Engineering,Huazhong University of Science and Technology,and Wuhan Institute of Quantum Technology,Wuhan 430074,China
Key Laboratory of Optoelectronic Chemical Materials and Devices of Ministry of Education,Jianghan University,Wuhan 430074,China
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