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arXiv 1803.04414hep-thcond-mat.mtrl-scicond-mat.stat-mech
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(2+1)维QFT真空更倾向于什么样的空间几何?

What spatial geometry does the (2+1)-dimensional QFT vacuum prefer?

Sebastian Fischetti, Lucas Wallis, Toby Wiseman

摘要:

我们考虑时间与空间的乘积上的相对论性(2+1)-QFT,并研究了真空自由能作为温度和空间几何的函数。我们研究了自由标量场和Dirac场在平坦空间任意扰动下的自由能差,发现自由能差与平坦空间的自由能差是有限的,并且总是\textit{negative}到扰动的首阶.因此,自由的(2+1)-QFT在所有尺度上似乎总是在能量上倾向于一个褶皱的空间;在零温度下,这是一个纯粹的量子效应。重要的是,我们表明,即使在室温下,这种量子效应对于单层石墨烯的相对论狄拉克自由度也是不可忽略的,因此我们认为,这种真空能量效应应该包括在石墨烯或类似材料的平衡构型的适当分析中。

英文摘要:

We consider relativistic (2+1)-QFTs on a product of time with a two-space and study the vacuum free energy as a functional of the temperature and spatial geometry. We focus on free scalar and Dirac fields on arbitrary perturbations of flat space, finding that the free energy difference from flat space is finite and always \textit{negative} to leading order in the perturbation. Thus free (2+1)-QFTs appear to always energetically favor a crumpled space on all scales; at zero temperature this is a purely quantum effect. Importantly, we show that this quantum effect is non-negligible for the relativistic Dirac degrees of freedom on monolayer graphene even at room temperature, so we argue that this vacuum energy effect should be included for a proper analysis of the equilibrium configuration of graphene or similar materials.

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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