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arXiv 1604.08765hep-thquant-ph
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带间隙全息淬火

Holographic Quenches with a Gap

Emilia da Silva, Esperanza Lopez, Javier Mas, Alexandre Serantes

摘要:

为了全息地模拟具有带隙末态哈密顿量的猝灭,我们考虑了具有红外硬壁的反德西特空间中的引力标量理论。我们允许壁面处的标量场具有随时间变化的分布。这引起体与壁之间的能量交换,并产生振荡标量脉冲。我们认为这种背景是对偶场论中量子复兴的对应物。我们进行了定性的比较与淬火动力学的大规模Schwinger模型,这是最近使用张量网络技术进行了分析。如果振荡标量脉冲的宽度与由猝灭传递的能量密度成反比,则发现协议。我们认为这是全息猝灭的一般特征。

英文摘要:

In order to holographically model quenches with a gapped final hamiltonian, we consider a gravity-scalar theory in anti-de Sitter space with an infrared hard wall. We allow a time dependent profile for the scalar field at the wall. This induces an energy exchange between bulk and wall and generates an oscillating scalar pulse. We argue that such backgrounds are the counterpart of quantum revivals in the dual field theory. We perform a qualitative comparison with the quench dynamics of the massive Schwinger model, which has been recently analyzed using tensor network techniques. Agreement is found provided the width of the oscillating scalar pulse is inversely linked to the energy density communicated by the quench. We propose this to be a general feature of holographic quenches.

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