---------- Forwarded message ----------
From:
Zhengcheng Gu <zhengchenggu@gmail.com>Date: Wed, Nov 19, 2014 at 4:00 PM
Subject: Re: [CMT Seminar] Announcing Condensed Matter Physics Seminar on Wednesday 10/22: Zheng-Cheng Gu
To: "
cmt_seminar@mit.edu" <
cmt_seminar@mit.edu>
Dear All:
Prof. Kitaev will give talk at Harvard on Thursday 1:30pm. The lecture room is 530, Science Center(Math Department). Here is the title and abstact.
Title: "Short-range entangled phases and homotopy theory"
Abstract
I will give an informal definition of a short-range entangled state of spins or fermions on an n-dimensional lattice. The set of such states (say, in the spin case) is some topological space B_n, and the sequence B_0, B_1,.. is a homotopy spectrum. Although only a few members of this sequence are known, there is a formal procedure to construct a similar sequence for short-range entangled states that are invariant under a local action of a compact Lie group.
best regards,
Zhengcheng
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