arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2008.11176cond-mat.str-elquant-ph
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张量网络可以解决费米曲面

Tensor Networks Can Resolve Fermi Surfaces

Quinten Mortier, Norbert Schuch, Frank Verstraete, Jutho Haegeman

摘要:

我们表明,预计纠缠对状态(PEPS)是能够代表基态的关键,费米系统表现出1D和0D费米表面上的二维晶格键尺寸的有效缩放。外推有限尺寸的费米子投影纠缠对状态的高斯限制的热力学极限的结果,作为键尺寸的函数的能量精度被发现改善作为幂律,说明可以通过以受控的方式增加键尺寸获得任意精度。在这个过程中,边界条件和系统的大小必须仔细选择,以避免根源于其非平凡拓扑结构的非解析性的Anterior。

英文摘要:

We demonstrate that projected entangled-pair states (PEPS) are able to represent ground states of critical, fermionic systems exhibiting both 1d and 0d Fermi surfaces on a 2D lattice with an efficient scaling of the bond dimension. Extrapolating finite size results for the Gaussian restriction of fermionic projected entangled-pair states to the thermodynamic limit, the energy precision as a function of the bond dimension is found to improve as a power law, illustrating that an arbitrary precision can be obtained by increasing the bond dimension in a controlled manner. In this process, boundary conditions and system sizes have to be chosen carefully so that nonanalyticities of the Ansatz, rooted in its nontrivial topology, are avoided.

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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