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Flat Currents and Solutions of Sigma Model on Supercoset Targets with Z2m Grading

Chinese Physics Letters 2007年第12期24卷 3374-3377页

作者： KE San-Min 柯三民石康杰王春吴晟 Institute of Modern Physics Northwest University Xi'an 710069 College of Science Xi'an Shiyou University Xi'an 710065

We find one parameter fiat currents of the Sigma Model on supercoset targets with Z2m grading given by Young satisfaction equations of motion and the Virasoro constraint. This means that one can generate a series of classical solutions from the original one. For these new solutions one can also construct fiat currents and conserved charges, which form the same set with the original one.

关键词： Supercoset Targets Sigma Model

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Yang-Baxter deformations of supercoset Sigma Models with Z_(4m) grading

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Chinese Physics C 2017年第11期41卷 10-13页

作者：柯三民杨文力江克侠王春帅学敏王展云石刚 College of Science Chang’an University Institute of Modern Physics Northwest University Shaanxi Key Laboratory for Theoretical Physics Frontiers Department of Physics Engineering College of CAPF College of Science Xi’an Shiyou University School of telecom Xi’an University of Posts & telecommunications

We have studied Yang-Baxter deformations of supercoset Sigma Models with Z4m grading.The deformations are specified by a skew-symmetric classical r-matrix satisfying the classical Yang-Baxter equations.The deformed action is constructed and the Lax pair is also presented.When m= 1,our results reduce to those of the type ⅡB Green-Schwarz superstring on AdS5×S5 background recently given by Kawaguchi,Matsumoto and Yoshida.

关键词： Sigma Model supercoset target Yang-Baxter deformation Lax pair

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η string formation in QCD chiral phase transition

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Chinese Physics C 2010年第4期34卷 444-447页

作者：徐晓梅傅永平李云德 Physics Department Yunnan Normal University Physics Department Yunnan University

In the paper we discuss the role of the axial U（1）A symmetry in the chiral phase transition using the U（Nf）R × U（Nf）L linear Sigma Model with two massless quark flavors. It is expected that above a certain temperature the axial U（1）A symmetry will be restored. A string-like static solution, the η string can be formed and detected in the ultrarelativistic heavy-ion collision process.

关键词： η string Sigma Model chiral phase transition

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Nonabelian Dualization of Plane Wave Backgrounds

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Journal of Modern Physics 2012年第9期3卷 1088-1095页

作者： Ladislav Hlavaty Miroslav Turek Faculty of Nuclear Sciences and Physical Engineering Czech Technical University in PraguePragueCzech Republic

We investigate plane-parallel wave metrics from the point of view of their (Poisson-Lie) T-dualizability. For that purpose we reconstruct the metrics as backgrounds of nonlinear Sigma Models on Lie groups. For construction of dual backgrounds we use Drinfel’d doubles obtained from the isometry groups of the metrics. We find dilaton fields that enable to satisfy the vanishing beta equations for the duals of the homogenous plane-parallel wave metric. Torsion potentials or B-fields, invariant w.r.t. the isometry group of Lobachevski plane waves are obtained by the Drinfel’d double construction. We show that a certain kind of plurality, different from the (atomic) Poisson-Lie T-plurality, may exist in case that metrics admit several isometry subgroups having the dimension of the Riemannian manifold. An example of that are two different backgrounds dual to the homogenous plane-parallel wave metric.

关键词： Sigma Model String Duality pp-Wave Background

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