5,457 reputation
2441
bio website dao.mit.edu/~wen
location Waterloo, Canada
age 53
visits member for 2 years, 6 months
seen 2 days ago

I am a professor in condensed matter theory.

The "favorites" link below contains a list of questions that I gathered from physics.stackexchange. Please have a look.


Nov
28
revised Gauge symmetry is not a symmetry?
added 7 characters in body
Nov
23
comment How $Z_{2}$ topological order is introduced to distinguish states?
One should know that the state, having the so called "Z2 topological order" in the paper "Z2 topological order and the quantum spin hall effect", actually have no topological order as defined by en.wikipedia.org/wiki/Topological_order. As mentioned in the paper, such a state in general does not even have spin hall effect, not to mention the "quantum spin hall effect".
Oct
16
revised Definition of short range entanglement
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Oct
10
awarded  Nice Answer
Oct
6
awarded  Nice Answer
Sep
23
awarded  Nice Answer
Sep
19
revised Definition of short range entanglement
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Sep
19
revised Definition of short range entanglement
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Sep
19
revised Definition of short range entanglement
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Sep
19
comment Explicit degeneracy in SPT phases
|det(K)| refer to the topological degeneracy on a torus. It has noting to do with the degeneracy on the boundary.
Sep
19
comment Explicit degeneracy in SPT phases
Yes, |det(K)| only refer to the topological degeneracy. Also In the case of explicit symmetry breaking, the degenerate eigenstates do not form a representation, in particular they do not form a singlet representation.
Sep
19
revised Definition of short range entanglement
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Sep
19
revised Definition of short range entanglement
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Sep
19
comment Is the Standard Model consistent (UV complete)?
By "the Standard Model is consistent in perturbative expansions" I mean that perturbative expansions up to a small fixed order is well defined. But it is known that the perturbative expansion does not converge (the radius of convergince is zero). At a finite order, although the perturbative expansions is well defined, the results do not conserve conserve probability.
Sep
19
revised Is the Standard Model consistent (UV complete)?
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Sep
19
comment Definition of short range entanglement
Yes. My version of SRE implies vanishing thermal hall conductance in 2+1D.
Sep
19
revised Definition of short range entanglement
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Sep
19
revised Definition of short range entanglement
edited body
Sep
19
revised Definition of short range entanglement
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Sep
19
revised Definition of short range entanglement
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