Scaling of the local quantum uncertainty at quantum phase transitions
Statistical Mechanics
2016-04-06 v3 Quantum Physics
Abstract
We investigate the local quantum uncertainty (LQU) between a block of L qubits and one single qubit in a composite system of n qubits driven through a quantum phase transition (QPT). A first-order QPT is analytically considered through a Hamiltonian implementation of the quantum search. In the case of second-order QPTs, we consider the transverse-field Ising chain via a numerical analysis through density matrix renormalization group. For both cases, we compute the LQU for finite-sizes as a function of L and of the coupling parameter, analyzing its pronounced behavior at the QPT.
Keywords
Cite
@article{arxiv.1508.07382,
title = {Scaling of the local quantum uncertainty at quantum phase transitions},
author = {I. B. Coulamy and J. H. Warnes and M. S. Sarandy and A. Saguia},
journal= {arXiv preprint arXiv:1508.07382},
year = {2016}
}
Comments
7 pages, 10 figures. v3: published version