Division II includes non-equilibrium statistic physics, condensed matter physics, nonlinear theory, computational physics, theoretical biological physics, atom-molecule and quantum interference theory.Its research orientations include:(1) Statistical Physics and Theoretical Biophysics (2) Condensed Matter Physics and Quantum Physics.

**(1) Statistical Physics and Theoretical Biophysics**

The research fields of this group cover a wide range in theoretical statistical mechanics, biophysics, chemical physics, bioinformatics, and their interdisciplinary applications. In recent years, scientific studies in this group concentrate on the following topics: 1) Bioinformatics, i.e., the application of statistical and linguistic methods in genomics and proteomics; 2) Statistical mechanics of molecular and cellular biological systems, such as single molecule biophysics of DNA, RNA, and proteins, elastic theory of bio-membranes, and self-assembly of nano and biomolecular systems; 3) Theoretical and experimental investigation of biological networks (gene regulation, cell-cycle control, etc.); 4) Statistical mechanics and physical properties of liquids and glassy systems; 5) Phase transitions and critical phenomena of complex and social networks; 6) Spin-glass theories for finite-connectivity systems and its application to information systems and hard combinatorial optimization problems. These studies help to understand how basic physics laws are transcribed into the rich diversity in nature. The distinct feature of our group is theoretical studies of biological, chemical, and complex systems from the perspective of statistical physics.

**（2）****Condensed Matter Physics and Quantum Physics**

The research interests of this group cover a wide range of topics in condensed matter physics and quantum physics, such as the strongly correlated system, the topological states of matter, quantum information, quantum optical, atomic physics, and ultracold atomic gases. Specifically, we are interested in 1) physical mechanism of strongly correlated systems such as quantum Hall effect, high temperature superconductivity and giant magnetoresistance systems, quantum liquids and quantum critical phenomena; 2) development of the numerical simulation methods for the quantum many-body systems, including the density matrix renormalization group, the quantum Monte Carlo simulations, and the first principles and ab initio computational studies; 3) topological states of matter, e.g., the topological insulator and topological superconductor, non-abelian anyons and their application to topological quantum computation; 4) physical properties of mesoscopic systems, such as the coherence, correlation, fluctuation, dissipation, transports of the charge and spin of the current carriers, photons and neutral atoms; 5) the fundamental issues of quantum physics, such as quantum measurement and quantum decoherence/dissipation in quantum open systems; 6) quantum state engineering based on superconducting qubits and circuit quantum electrodynamics, and quantum phenomena in opto-mechanical systems; 7) exotic quantum phases in ultracold atomic and molecular gases, e.g., the dipolar Bose-Einstein condensates, degenerate Fermi gases with strong dipole-dipole interaction, and ultracold collisions of atoms and molecules; 8) coherent state transfer in quantum network, in particular, single photon transfer in coupled cavity array and the quantum transfer of collective excitations in a bio-network, such as photosynthesis and avian compass. The research topics also include developing the theoretical approach for the natural atoms and artificial systems in strong external fields, which is related to semi-classical physics and quantum chaos, and probing mathematical structures behind the dynamics of physical systems, such as quantum groups and Berry phase.