Symmetry resolved entanglement of excited states in quantum field theory. Part II. Numerics, interacting theories and higher dimensions
Symmetry resolved entanglement of excited states in quantum field theory. Part II. Numerics, interacting theories and higher dimensions
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对称性解决了量子场论中激发态的纠缠。
DOI:
10.1007/jhep12(2022)128
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发表时间:
2022
影响因子:
5.4
通讯作者:
Capizzi L
中科院分区:
文献类型:
--
作者:
Capizzi L
In a recent paper we studied the entanglement content of zero-density excited states in complex free quantum field theories, focusing on the symmetry resolved entanglement entropy (SREE). By zero-density states we mean states consisting of a fixed, finite number of excitations above the ground state in an infinite-volume system. The SREE is defined for theories that possess an internal symmetry and provides a measure of the contribution to the total entanglement of each symmetry sector. In our work, we showed that the ratio of Fourier-transforms of the SREEs (ie the ratio of charged moments) takes a very simple and universal form for these states, which depends only on the number, statistics and symmetry charge of the excitations as well as the relative size of the entanglement region with respect to the whole system’s size. In this paper we provide numerical evidence for our formulae by computing functions of the charged moments in two free lattice theories: a 1D Fermi gas and a complex harmonic chain. We also extend our results in two directions: by showing that they apply also to excited states of interacting theories (ie magnon states) and by developing a higher dimensional generalisation of the branch point twist field picture, leading to results in (interacting) higher-dimensional models.
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影响因子:
1.3
作者:
Castro-Alvaredo O
通讯作者:
Castro-Alvaredo O
DOI:
10.1088/1751-8113/45/27/275401
发表时间:
2012
期刊:
Journal of Physics A: Mathematical and Theoretical
影响因子:
--
作者:
E. Levi
通讯作者:
E. Levi
影响因子:
5.4
作者:
O. Castro
通讯作者:
O. Castro
DOI:
10.1209/0295-5075/129/60007
发表时间:
2020
期刊:
Europhysics Letters
影响因子:
--
作者:
P. Calabrese;M. Collura;G. Di Giulio;Sara Murciano
通讯作者:
Sara Murciano
影响因子:
3.7
作者:
Daniel Azses;E. Sela
通讯作者:
E. Sela