Oscillating terms in the Renyi entropy of Fermi gases and liquids
Oscillating terms in the Renyi entropy of Fermi gases and liquids
复制标题
费米气体和液体的 Renyi 熵中的振荡项
DOI:
10.1103/physrevb.87.235112
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发表时间:
2012
影响因子:
3.7
通讯作者:
N. Tubman
中科院分区:
文献类型:
--
作者:
Brian Swingle;J. Mcminis;N. Tubman
In this work we compute subleading oscillating terms in the Renyi entropy of Fermi gases and Fermi liquids corresponding to $2k_F$-like oscillations. Our theoretical tools are the one dimensional formulation of Fermi liquid entanglement familiar from discussions of the logarithmic violation of the area law and quantum Monte Carlo calculations. The main result is a formula for the oscillating term for any region geometry and a spherical Fermi surface. We compare this term to numerical calculations of entanglement using the correlation function method and find excellent agreement. We also compare with quantum Monte Carlo data on interacting Fermi liquids where we also find excellent agreement up to moderate interaction strengths.