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arXiv 1702.08655hep-thcond-mat.supr-congr-qcquant-ph
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空间高阶导数在动量空间纠缠中的作用

Role of spatial higher order derivatives in momentum space entanglement

S. Santhosh Kumar, S. Shankaranarayanan

摘要:

研究了一般(D + 1)维平坦时空中相互作用标量场不同能量模之间的动量纠缠。与文献[1]不同的是,我们采用Lorentz不变的归一化基态来计算动量空间的纠缠熵。我们证明了Lorenz不变量定义消除了在早期工作[1]中得到的伪幂律行为。更具体地说,我们证明了(1 + 1)维立方相互作用标量场导致了纠缠熵的对数发散,并且与实空间纠缠计算的结果一致.研究了在非线性自相互作用标量场势中引入Lorentz破坏高阶导数项的影响,发现空间高阶导数项的引入改善了纠缠熵的发散结构.

英文摘要:

We study the momentum space entanglement between different energy modes of interacting scalar fields propagating in general (D + 1)-dimensional flat space-time. As opposed to some of the recent works [1], we use Lorentz invariant normalized ground state to obtain the momentum space entanglement entropy. We show that the Lorenz invariant definition removes the spurious power-law behaviour obtained in the earlier works [1]. More specifically, we show that the cubic interacting scalar field in (1 + 1) dimensions leads to logarithmic divergence of the entanglement entropy and consistent with the results from real space entanglement calculations. We study the effects of the introduction of the Lorentz violating higher derivative terms in the presence of non-linear self inter- acting scalar field potential and show that the divergence structure of the entanglement entropy is improved in the presence of spatial higher derivative terms.

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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