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arXiv 1306.6135hep-thcond-mat.stat-mechhep-latphysics.comp-ph
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一维简化超Yang-Mills模型自发转动对称破缺的Monte Carlo研究

Monte Carlo studies of the spontaneous rotational symmetry breaking in dimensionally reduced super Yang-Mills models

Konstantinos N. Anagnostopoulos, Takehiro Azuma, Jun Nishimura

摘要:

SO(D)的自发对称性破缺(SSB)发生在超Yang-Mills理论降维后得到的矩阵模型中。特别地,D=10的情况对应于IIB矩阵模型,它是作为超弦理论的非微扰公式提出的,而SSB可能对应于四维时空的动力学生成。最近,它已经表明,通过使用高斯展开方法,SSB确实发生D=6和D=10,和有趣的性质的SSB共同的两种情况下已经提出。在这里,我们研究了同样的问题,从第一原理的Monte Carlo方法在D=6的情况下。尽管一个严重的复杂的行动问题,因式分解的方法使我们能够获得各种数量与SSB,这原来是一致的,与以前的结果由高斯展开方法。这也证明了因式分解法作为求解具有复作用问题或符号问题的系统的一般方法的有用性。

英文摘要:

It has long been speculated that the spontaneous symmetry breaking (SSB) of SO(D) occurs in matrix models obtained by dimensionally reducing super Yang-Mills theory in D=6,10 dimensions. In particular, the D=10 case corresponds to the IIB matrix model, which was proposed as a nonperturbative formulation of superstring theory, and the SSB may correspond to the dynamical generation of four-dimensional space-time. Recently, it has been shown by using the Gaussian expansion method that the SSB indeed occurs for D=6 and D=10, and interesting nature of the SSB common to both cases has been suggested. Here we study the same issue from first principles by a Monte Carlo method in the D=6 case. In spite of a severe complex-action problem, the factorization method enables us to obtain various quantities associated with the SSB, which turn out to be consistent with the previous results obtained by the Gaussian expansion method. This also demonstrates the usefulness of the factorization method as a general approach to systems with the complex-action problem or the sign problem.

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