E-mail: wen(at)dao(dot)mit(dot)edu
Telephone: 617-253-5016
Fax: 617-253-2562
Room: 6C-317
Dept. of Physics, MIT
77 Massachusetts Ave.
Cambridge, MA 02139
Curriculum Vitae
Symmetry protected topological orders and the group cohomology of their symmetry group
(pdf)
Xie Chen, Zheng-Cheng Gu, Zheng-Xin Liu, and Xiao-Gang Wen
arXiv:1106.4772
Introduced group cohomology theory into condensed matter physics to describe
short-range entangled phases with symmetry for interacting bosons.
Constructed two quantum spin models on a lattice which gives rise to emergent
gravitons (one with ω = k and the other with ω = k^3 dispersion).
After 6 years, many journals (Science, PRL, PRB, NJP, JHEP, NPB), and about
30 exchanges, one of our linear quantum gravity papers
finally get published in Nucl. Phys. B. Next problem: how non-linear quantum
gravity can emerge from some lattice models.
The referee reports and our replies represent detailed discussions between
parties who have different points of view on quantum gravity: emergence point
of view vs geometry/gauge point of view. The exchange of opinions is important
and helpful for the development of the difficult field of quantum gravity.
So, I would like to share those exchanges with the researchers in the field.
2012/5:
Following Hong Liu's suggestion, we moved the long introduction of the long
paper to appendix and resubmited the long paper to
NPB. This time, it was accepted [:-)
Photons and electrons as emergent phenomena
(pdf)
Michael A. Levin and Xiao-Gang Wen Rev. Mod. Phys.77, 871-879 (2005),
cond-mat/0407140
String-net condensation provides a way to unify light and electrons.
String-net condensation: A physical mechanism for topological phases
(pdf)
Michael Levin and Xiao-Gang Wen Phys. Rev. B71, 045110 (2005).
cond-mat/0404617
Introduced tensor category theory into condensed matter physics to describe
long-range entangled phases (ie topologically ordered phases) for interacting
bosons.