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arXiv 2512.09415hep-lat
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有限密度格点QCD无需外推

Finite density lattice QCD without extrapolations

Wuppertal University(伍珀塔尔大学);Pennsylvania State University(宾夕法尼亚州立大学);INFN Torino(意大利国家核物理研究所都灵分部)

Alexander Adam, Szabolcs Borsányi, Zoltán Fodor, Jana N. Guenther, Paolo Parotto, Attila Pásztor, Ludovica Pirelli, Chik Him Wong

AI总结:

本文通过规范 formulation 在物理夸克质量下实现有限密度QCD,计算了压力和化学势随重子数和奇异数的变化。

摘要:

有限密度格点QCD通常依赖于重子化学势(μ_B)的外推,无论是泰勒展开、T'展开(引用Borsanyi:2021sxv)还是解析延拓。然而,其有效范围难以控制。在规范 formulation 中,重子密度是系统的参数,而非μ_B。本文证明,我们可以在规范 formulation 中使用物理夸克质量访问有限密度QCD。我们展示了同时以奇异数(n_S)和重子数(n_B)密度作为参数的初步结果。具体而言,我们计算了QCD压力和化学势作为n_B和n_S函数。我们的计算依赖于高统计量模拟,使用2+1 4HEX- staggered 费米子。

英文摘要:

Finite density lattice QCD usually relies on extrapolations in baryon chemical potential ($μ_B$), be it Taylor expansion, T' expansion (\cite{Borsanyi:2021sxv}) or analytical continuation. However, their range of validity is difficult to control. In the canonical formulation, the baryon density is the parameter of the system, not $μ_B$. Here we demonstrate that we can access finite density QCD in the canonical formulation with physical quark masses. We present first results with both the strangeness ($n_S$) and baryon ($n_B$) densities as parameters. Specifically, we compute the QCD pressure and chemical potentials as functions of $n_B$ and $n_S$. Our computations rely on high-statistics simulations with 2+1 4HEX-staggered fermions.

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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