期刊
PHYSICAL REVIEW D
卷 81, 期 2, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.81.025017
关键词
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资金
- Alexander von Humboldt Foundation
- NSERC of Canada
- DFG [SCHU 1557/1-3, SFB-TR12, FI 690/3-1]
- Research Settlement Fund of Seoul National University
We present an analytical derivation of the winding number counting topological defects created by an O(N) symmetry-breaking quantum quench in N spatial dimensions. Our approach is universal in the sense that we do not employ any approximations apart from the large-N limit. The final result is nonperturbative in N, i.e., it cannot be obtained by an expansion in 1/N, and we obtain far less topological defects than quasiparticle excitations, in sharp distinction to previous, low-dimensional investigations.
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