Qijin Chen

Shanghai Branch, Hefei National Research Center for Materials Sciences at Microscale
the University of Science and Technology of China,

99 Xiupu Rd, Pudong, Shanghai 201315, CHINA       Email: qchen@jfi.uchicago.edu


EDUCATION

Ph.D., University of Chicago Chicago, IL 2000

Theoretical Condensed Matter Physics

M.S., Institute of Physics, Chinese Academy of Sciences (CAS) Beijing, China 1995

Experimental Condensed Matter Physics

B.S. (with honor), Univ. of Science and Technology of China (USTC) Hefei, China 1992

Nuclear and Particle Physics/Theoretical Physics

PROFESSIONAL EMPLOYMENTS

University of Science and Technology of China Hefei & Shanghai, China 2019-present

Changjiang Professor, National Lab for Physical Sciences at Microscale & Department of Modern Physics

Zhejiang University Hangzhou, China 2008-2019

Changjiang Professor, Zhejiang Institute of Modern Physics and Department of Physics

University of Chicago Chicago, IL 2004-2008

Research associate and Research Scientist, James Franck Institute

Argonne National Lab & University of Notre Dame Argonne, IL Summer, 2004

Visiting Fellow, Institute for Theoretical Sciences

Johns Hopkins University Baltimore, MD 2002 -2004

Postdoctoral Fellow, Department of Physics and Astronomy. (Advisor: Zlatko Tesanovic)

National High Magnetic Field Laboratory Tallahassee, FL 2000-2002

Postdoctoral Research Associate, Condensed Matter Theory Group. (Advisor: J. Robert Schrieffer)

University of Chicago Chicago, IL 1997-2000

Research Assistant, James Franck Institute. (Advisor: Kathryn Levin)

Institute of Physics, Chinese Academy of Sciences Beijing, China 1993-1995

Research Assistant, State Key Laboratory of Surface Physics. (Advisor: Zhangda Lin)

HONORS AND AWARDS

RESEARCH INTERESTS

ACADEMIC SERVICES

TEACHING EXPERIENCE

Professor, Department of Physics, Zhejiang University Hangzhou, China

Teaching Assistant, Department of Physics, University of Chicago Chicago, IL 1995-1999

PROFESSIONAL MEMBERSHIPS

RESEARCH HIGHLIGHTS

Research areas: Strongly correlated systems, quantum matter, esp. superfluidity and superconductivity, from high temperature superconductors to ultracold atomic gases.

Developed a pairing fluctuation theory that self-consistently includes the contribution of pairing fluctuations in fermion self energy. It can address the wide-spread abnormal pseudogap phenomena in high Tc superconductors, and has become one of several major schools of high Tc theories, since it was published in Phys. Rev. Lett. 81, 4708 (1998). Based on a BCS-BEC crossover scenario, this theory is a natural generalization of BCS theory to short coherence length superconductors. It is one (of very few theories) that can generate a cuprate phase diagram, in (semi-)quantitative agreement with experiment. It provides a natural explanation for the mysterious quasi-universal behavior of the temperature dependence of the penetration depth for different doping concentrations in cuprate superconductors. It also provides a unified picture for the anomalous diamagnetic response, Nernst effect, and unusual behavior of the Hall coefficient throughout the entire cuprate phase diagrams.

Applied successfully the pairing fluctuation theory to address quantitatively experiments in ultracold Fermi gases, including the phase diagram, the thermodynamic transitions, density profile, rf spectroscopy, etc. First introduced the pseudogap concept into the atomic Fermi gas field, which has now been established experimentally.

Explored and predicted exotic new quantum phenomena associated with pairing and superfluidity with unusual parameters or configurations, including physics in mixed dimensionality, and in lattice-continuum mixed systems.

Published about 80 SCI papers, with H-index = 27 and an overall citation of over 2800.

Top five most cited theory papers:

  1. J. Kinast, A. Turlapov, J.E. Thomas, Q.J. Chen, J. Stajic, and K. Levin, Heat capacity of a strongly interacting Fermi gas, Science 307, 1296 (2005) (Science Express, doi:10.1126/science.1109220). [Times cited: > 328]

  2. Q.J. Chen, J. Stajic, S.N. Tan, and K. Levin, BCS-BEC crossover: From high temperature superconductors to ultracold superfluids, Physics Reports 412, 1-88 (2005). [Times cited: > 590]

  3. J. Stajic, J.N. Milstein, Q.J. Chen, M.L. Chiofalo, M.J. Holland, and K. Levin, Nature of superfluidity in ultracold Fermi gases near Feshbach resonances, Phys. Rev. A 69, 063610 (2004). [Times cited > 86]

  4. Q.J. Chen, I. Kosztin, B. Jank´o, and K. Levin, Superconducting transitions from the pseudogap state: d-wave symmetry, lattice, and low-dimensional effects, Phys. Rev. B 59, 7083 (1999). [Times cited >84]

  5. Q.J. Chen, I. Kosztin, B. Jank´o, and K. Levin, Pairing fluctuation theory of superconducting properties in underdoped to overdoped cuprates, Phys. Rev. Lett. 81, 4708 (1998). [Times cited: > 184]

PUBLICATIONS (See a separate file or http://jfi.uchicago.edu/~qchen/Publications.pdf for a list.)

INVITED TALKS (See a separate file or http://jfi.uchicago.edu/~qchen/Presentations.pdf for a list.)