Quantum Physics and Quantum Information

Division research focus

The goal of the research carried out in the Quantum Physics and Quantum Information Division is to address critical issues in quantum science and technology, as well as to contribute as a driving force to the on-going structural reform of science and technology in China. Taking an important role in the field of quantum physics and quantum information, scientists in this Division are aiming at finding cutting-edge solutions to the fundamental problems, establishing new theories and efficient computational methods, and developing novel ideas and techniques related to the emergent quantum technologies.

Division Research Areas
  • ·  Fundamental problems in quantum mechanics and quantum statistics

    We are interested in fundamental aspects of quantum mechanics, e.g., quantum measurement problems, open quantum system approaches to quantum decoherence, and quantum thermodynamics. For quantum mechanics and quantum statistics, we believe that there are many problems which are not yet understood completely. We are not satisfied with investigating these problems only on the philosophical basis, but intend to have a "down-to-earth" understanding of them in association with the most recent experiments about circuit QED of superconducting systems, optomechanics with nano-mechanical resonators, the photon transport in low-dimensional confined structures, and the ultra-cold atoms in Bose-Einstein condensate.

  • ·  Quantum optics

    Our research includes: (1) the quantum interference effect in quantum optics, such as the collective spontaneous emission of atoms in various environments; (2) the effects of anti-rotating-wave terms in various quantum optical systems, such as collective Lamb shift; (3) meta-materials, such as negative index materials; and (4) quantum optomechanics, e.g., the ground-state cooling of a nanomechanical resonator, optomechanically-induced transparency/circulator, and mechanical sensing in (hybrid) optomechanical systems.

  • ·  Physics and applications of defect centers in solids

    Various defect centers in solid-state materials (e.g., nitrogen- and silicon-vacancy centers in diamond, phosphorus donors in silicon, and rare earth ions in laser crystals) are promising candidate systems for quantum information processing. They also have broad applications in different fields, including quantum metrology and biological sensing. The understanding of the underlying physics of these defect centers are of great importance to the applications. In close collaboration with world's pioneering experimental groups, we are studying the rich quantum phenomena occurring in solid-state defect centers, particularly the spin dynamics and novel quantum optical processes.

  • ·  Computational atomic and molecular physics

    We carry out studies on quantum many-body problems in atomic, molecular and cluster systems, with the aid of modern computational science. We develop computational methods for describing various physical properties as well as dynamical processes of such physical systems quantitatively, including the electronic-structure theory of highly excited atomic and molecular systems, the dynamical processes in atoms and molecules, and the properties of matter (plasmas) under extreme conditions.

  • ·  Solid-state quantum computation

    We both theoretically and experimentally explore scalable quantum computation using solid-state qubits, including the quantum computing with superconducting circuits, electron spins in quantum dots, and defects in solid-state materials. We also investigate hybrid quantum systems and explore their distinct advantages in quantum information processing.

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