XiaoGang Wen
Research Interests
 Theory of Strongly Correlated Electronic Systems
 Theory of Topological Order and Quantum Order
 Theory of High Temperature Superconductors
 Origin and Unification of Elementary Particles (such as light and electrons)
 Theory of Quantum Hall Effect and NonAbelian Statistics
Prof. Wen’s main research area is condensed matter theory. He introduced the notion of topological order and quantum order to describe a new class of matter states. This opens up a new research direction in condensed matter physics. He found that states with topological order contain nontrivial boundary excitations and developed chiral Luttinger theory for the boundary states. The boundary states can become ideal conduction channel which may leads to device application of topological phases. He also proposed a special class of topological order: nonAbelian quantum Hall states. They contain emergent particles with nonAbelian statistics which generalizes the well known Bose and Fermi statistics. NonAbelian particles may allow us to perform fault tolerant quantum computations. He found that stringnet condensations can give rise to a large class of topological orders. In particular, stringnet condensation provides a unified origin of photons, electrons, and other elementary particles. It unifies two fundamental phenomena: gauge interactions and Fermi statistics. He also proposed the SU(2) gauge theory of high temperature superconductors.
Biographical Sketch
XiaoGang Wen received a BS in physics from University of Science and Technology of China in 1982 and a Ph.D. in physics from Princeton University in 1987.
He studied superstring theory under theoretical physicist Edward Witten at Princeton University. Wen later switched his research field to condensed matter physics while working with theoretical physicists Robert Schrieffer, Frank Wilczek, Anthony Zee in Institute for Theoretical Physics, UC Santa Barbara (19871989).
He became a fiveyear member of IAS at Princeton in 1989 and joint MIT in 1991. Wen is a Cecil and Ida Green Professor of Physics at MIT (2004present), a Distinguished Moore Scholar at Caltech (2006), and a Distinguished Research Chair at Perimeter Institute (2009). Among other honors, Wen is a Sloan Foundation Fellow (1992); APS Fellow (2002), Isaac Newton Chair at the Perimeter Institute for Theoretical Physics (2011), cowinner of the Oliver E. Buckley Condensed Matter Physics Prize (2017) “for theories of topological order and its consequences in a broad range of physical systems“, and was elected to National Academy of Science (2018) in recognition of “distinguished and continuing achievements in original research.”
UltraQuantum Matter research gets $8 million boost
MIT’s Senthil Todadri and XiaoGang Wen will study highly entangled quantum matter in a collaboration supported by the Simons Foundation.
Awards & Honors
 2018 // ICTP Dirac Medal (along with Subir Sachdev (Harvard University), Dam Thanh Son (University of Chicago)) for their independent contributions towards understanding novel phases in strongly interacting manybody systems, introducing original transdisciplinary techniques.
 2017 // APS Oliver E. Buckley Condensed Matter Physics Prize (cowinner) "for theories of topological order and its consequences in a broad range of physical systems"
 2011 // Isaac Newton Chair at the Perimeter Institute for Theoretical Physics
 2009 // MIT School of Science Prize for Excellence in Undergraduate Teaching
 2004 // Cecil and Ida B. Green Professor of Physics
 2002 // Fellow of the American Physical Society
 1992 // Alfred P. Sloan Foundation Fellow
Key Publications

Classification of Gapped Symmetric Phases in 1D Spin Systems
Xie Chen, ZhengCheng Gu, XiaoGang Wen
arXiv:1008.3745
(Classified gapped symmetric phases for 1D qubit systems through local unitary transformations and the projective representations of the symmetry group.) 
Local unitary transformation, longrange quantum entanglement, wave function renormalization, and topological order
Xie Chen, ZhengCheng Gu, XiaoGang Wen
arXiv:1004.3835
(Introduced the notion of longrange quantum entanglement through local unitary transformation. Longrange quantum entanglement is the essence of topological order and quantum order.) 
A lattice bosonic model as a quantum theory of gravity
ZhengCheng Gu and XiaoGang Wen
grqc/0606100
(Constructed a quantum qubit model on a lattice which gives rise to emergent gravitons.)