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                  中文版
                  Academics Content
                  Professor Shu Chuancun Publishes His New Quantum Control Research in Physical Review Letters
                  December 12, 2019Click:

                  Professor Shu Chuancun of School of Physics and Electronics, CSU published his research “Vanishing and Revival of Resonance Raman Scattering” in Physical Review Letters, a prestigious journal in physics. Co-authored by Shu Chuancun, Professor Guo Yu from Changsha University of Science and Technology, Professor Dong Daoyi from University of New South Wales in Canberra, Australia and Professor Franco Nori from RIKEN in Saitama, Japan, the paper is the latest research in quantum control and atomic, molecular and optical physics. Professor Shu is the principal investigator, and the School of Physics and Electronics of Central South University is the PI’s affiliation.

                  The ability to understand and ultimately control nonlinear optical effects is of great significance and value in the basic frontier research in the fields of quantum optics, quantum information, quantum computing and quantum biology. Analytically and numerically, the paper studies multichannel resonance Raman scattering (RRS) between hyperfine energy levels of optical field induced ultralow temperature87Rb atom. Using a typical four-level double-Λ system as an example, the research shows how two simultaneously excited RRS paths are capable of naturally vanishing RRS effects in broad-band pulsed region. The paper also shows that this counterintuitive phenomenon, i.e. the RRS vanishing, can be prevented by transferring a modulated phase of the laser pulse to the system at resonance frequencies, thus achieving the revival of RRS between hyperfine energy levels. The paper analyzes the research’s experimental feasibility in ultracold alkali metal atom and its potential applications in quantum superconductivity, diamond color center and other solid artificial atoms. As a result, the research not only provides more insights into the underlying principle behind nonlinear optical effects controlled by quantum interference, but also expands the research on ultracold atoms and stimulated Raman spectroscopy.

                  Resonance stimulated Raman scattering controlled by optical field: left figure shows multichannel RRS path in four-level A rubidium87Rb atom composed of hyperfine structures; right figure shows the dependence of vanishing of RRS on control pulse bandwidth

                  The paper is Professor Shu’s another new research result in quantum control followed by the paper released in JACS(a leading international journal in chemistry) in 2018. The work was supported by national and regional funding projects, such as NSFC, ARC, AFOSR, JST and JSPS.

                  Link:https://link.aps.org/doi/10.1103/PhysRevLett.123.223202

                  Source:School of Physics and Electronics

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