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Generation of two-axis countertwisting squeezed spin states via Uhrig dynamical decoupling

science China(information sciences) 2021年第2期64卷 227-236页

作者： Jiying ZHANG Shan WU Yongchang ZHANG Zhengwei ZHOU Institute for Interdisciplinary Research Jianghan University Department of Physics and Astronomy Aarhus University Key Laboratory of quantum information University of Science and Technology of ChinaChinese Academy of Sciences

We propose a scheme to generate two-axis countertwisting squeezed spin states from a one-axis twisting Hamiltonian via Uhrig dynamical decoupling. The proposed scheme significantly reduces the number of control pulses or requires shorter evolution time compared to previous proposals. The minimum number of applied pulses changes relative to the spin number almost linearly. The proposed scheme significantly relieves the experimental demand on the applied pulses or the evolution time, and we expect it would be within the reach of current spin squeezing experiment.

关键词： squeezed spin states Uhrig dynamical decoupling control pulses quantum control quantum metrology quantum information science

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A Critical Overview on quantum Computing

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Journal of quantum Computing 2020年第4期2卷 181-192页

作者： Saptarshi Sahoo Amit Kumar Mandal Pijus Kanti Samanta Indranil Basu Pratik Roy Institute of Engineering and Management Salt Lake Electronics Complex Kolkata700091West BengalIndia Department of Physics(PG&UG) Prabhat Kumar CollegeContai721404West BengalIndia

quantum Computing and quantum information science seem very promising and developing rapidly since its inception in early 1980s by Paul Benioff with the proposal of quantum mechanical model of the Turing machine and later By Richard Feynman and Yuri Manin for the proposal of a quantum computers for simulating various problems that classical computer could *** computers have a computational advantage for some problems,over classical computers and most applications are trying to use an efficient combination of classical and quantum computers like Shor’s factoring *** areas that are expected to be benefitted from quantum computing are Machine Learning and deep learning,molecular biology,genomics and cancer research,space exploration,atomic and nuclear research and macro-economic *** paper represents a brief overview of the state of art of quantum computing and quantum information science with discussions of various theoretical and experimental aspects adopted by the researchers.

关键词： quantum computing quantum information science

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