Entanglement area law from specific heat capacity

Entanglement area law from specific heat capacity
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由比热容得出的纠缠面积定律

DOI:
10.1103/physrevb.92.115134
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发表时间:
2015
期刊:
影响因子:
3.7
通讯作者:
Brandão F
Brandão F
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Brandão F

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研究了任意维晶格上量子多体模型低能态纠缠的标度性。我们允许无界的哈密顿,这样的系统与玻色子自由度包括在内。我们发现,如果在足够低的温度下,模型的比热容随温度的倒数呈指数衰减,则每个低能态的纠缠满足面积定律(对数修正)。热容的这种行为通常在有间隙的系统中观察到。仅假设低温比热随温度多项式衰减,我们发现纠缠的子体积标度。我们的研究结果给出了实验验证的面积法的条件,表明它们是一个通用的低能量状态的物质,并构成证明的面积法的无界哈密顿超出那些是可积的。
We study the scaling of entanglement in low-energy states of quantum many-body models on lattices of arbitrary dimensions. We allow for unbounded Hamiltonians such that systems with bosonic degrees of freedom are included. We show that, if at low enough temperatures the specific heat capacity of the model decays exponentially with inverse temperature, the entanglement in every low-energy state satisfies an area law (with a logarithmic correction). This behavior of the heat capacity is typically observed in gapped systems. Assuming merely that the low-temperature specific heat decays polynomially with temperature, we find a subvolume scaling of entanglement. Our results give experimentally verifiable conditions for area laws, show that they are a generic property of low-energy states of matter, and constitute proof of an area law for unbounded Hamiltonians beyond those that are integrable.
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