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arXiv 1503.08813hep-lathep-phhep-th
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利用复Langevin方程实现跳跃参数的全阶展开

Hopping parameter expansion to all orders using the complex Langevin equation

G. Aarts, E. Seiler, D. Sexty, I. -O. Stamatescu

摘要:

在保持规范作用量不变的情况下,我们提出了两种新的基于Wilson费米子的有限密度QCD跳跃参数展开公式。我们使用复朗之万方程来规避理论中的符号问题。我们进行模拟,在非常高的阶的扩展,这样的收敛是直接观察。我们比较结果的完整QCD结果,并看到协议在足够高的订单。这些结果为利用复朗之万动力学来研究非零密度下的QCD提供了支持,无论是在完全理论还是扩展理论中,以及后者的收敛性。

英文摘要:

We propose two novel formulations of the hopping parameter expansion for finite density QCD using Wilson fermions, while keeping the gauge action intact. We use the complex Langevin equation to circumvent the sign problem in the theory. We perform simulations at very high order of the expansion, such that convergence is directly observable. We compare results to the full QCD results, and see agreement at sufficiently high orders. These results provide support for the use of complex Langevin dynamics to study QCD at nonzero density, both in the full and the expanded theory, and for the convergence of the latter.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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