Zobrazeno 1 - 10
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pro vyhledávání: '"Thacker, H"'
Autor:
Thacker, H. B.
Topological insulators are substances which are bulk insulators but which carry current via special "topologically protected" edge states. The understanding of long range topological order in these systems is built around the idea of a Berry connecti
Externí odkaz:
http://arxiv.org/abs/1409.3862
Autor:
Thacker, H. B., Wong, Gabriel
Publikováno v:
Phys. Rev. D 91, 065009 (2015)
The dynamical effects of topological charge in two-dimensional QED can be expressed in terms of a topological order parameter via a Berry phase construction. The Berry phase describes the electric charge polarization of the vacuum in a manner similar
Externí odkaz:
http://arxiv.org/abs/1409.0778
Autor:
Thacker, H. B.
Publikováno v:
Phys. Rev. D 89, 125011 (2014)
There is considerable evidence, based on large $N_c$ chiral dynamics, holographic QCD, and Monte Carlo studies, that the QCD vacuum is permeated by discrete quasivacua separated by domain walls across which the local value of the topological $\theta$
Externí odkaz:
http://arxiv.org/abs/1311.7104
Autor:
Thacker, H. B.
Both theoretical arguments and Monte Carlo observations indicate that the topological structure of the QCD vacuum consists of a laminated array of extended, coherent codimension-one membranes of alternating sign. Large-$N_c$ arguments, supported by g
Externí odkaz:
http://arxiv.org/abs/1302.0535
Autor:
Thacker, H. B., Xiong, Chi
We study the membrane-like structure of topological charge density and its fluctuations in the QCD vacuum. Quark zero modes are localized on the membranes and the resultant gauge anomaly is cancelled by the gauge variation of a Chern-Simons type effe
Externí odkaz:
http://arxiv.org/abs/1212.6229
Autor:
Thacker, H. B., Xiong, Chi
Large $N_c$ and holographic arguments, as well as Monte Carlo results, suggest that the topological structure of the QCD vacuum is dominated by codimension-one membranes which appear as thin dipole layers of topological charge. Such membranes arise n
Externí odkaz:
http://arxiv.org/abs/1208.4784
Autor:
Thacker, H. B.
Topological excitations in the QCD vacuum take the form of coherent codimension one sheets with positive and negative sheets juxtaposed in a dipole layer. These sheets may be interpreted as Luscher's "Wilson bags," which are domain walls between disc
Externí odkaz:
http://arxiv.org/abs/1110.5617
The Witten-Sakai-Sugimoto construction of holographic QCD in terms of D4 color branes and D8 flavor branes in type IIA string theory is used to investigate the role of topological charge in the chiral dynamics of quarks in QCD. The QCD theta term ari
Externí odkaz:
http://arxiv.org/abs/1104.3063
Autor:
Thacker, H. B.
Publikováno v:
Phys.Rev.D81:125006,2010
Lattice Monte Carlo studies in SU(3) gauge theory have shown that the topological charge distribution in the vacuum is dominated by thin coherent membranes of codimension one arranged in a layered, alternating-sign sandwich. A similar lamination of t
Externí odkaz:
http://arxiv.org/abs/1001.4215
Autor:
Thacker, H. B.
Publikováno v:
PoS LATTICE2008:260,2008
Monte Carlo studies of $CP^{N-1}$ sigma models have shown that the structure of topological charge in these models undergoes a sharp transition at $N=N_c\approx 4$. For $NN_c$ it
Externí odkaz:
http://arxiv.org/abs/0810.4131