SVD Entanglement Entropy
Abstract
In this paper, we introduce a new quantity called SVD entanglement entropy. This is a generalization of entanglement entropy in that it depends on two different states, as in pre- and post-selection processes. This SVD entanglement entropy takes non-negative real values and is bounded by the logarithm of the Hilbert space dimensions. The SVD entanglement entropy can be interpreted as the average number of Bell pairs distillable from intermediates states. We observe that the SVD entanglement entropy gets enhanced when the two states are in the different quantum phases in an explicit example of the transverse-field Ising model. Moreover, we calculate the R\'enyi SVD entropy in various field theories and examine holographic calculations using the AdS/CFT correspondence.
Cite
@article{arxiv.2307.06531,
title = {SVD Entanglement Entropy},
author = {Arthur J. Parzygnat and Tadashi Takayanagi and Yusuke Taki and Zixia Wei},
journal= {arXiv preprint arXiv:2307.06531},
year = {2024}
}
Comments
42 pages, 23 figures, V2: minor adjustments