TY - JOUR
T1 - Frustration, area law, and interference in quantum spin models
AU - Sen, Aditi
AU - Sen, Ujjwal
AU - Dziarmaga, Jacek
AU - Sanpera, Anna
AU - Lewenstein, MacIej
PY - 2008/10/29
Y1 - 2008/10/29
N2 - We study frustrated quantum systems from a quantum information perspective. Within this approach, we find that highly frustrated systems do not follow any general "area law" of block entanglement, while weakly frustrated ones have area laws similar to those of nonfrustrated systems away from criticality. To calculate the block entanglement in systems with degenerate ground states, typical in frustrated systems, we define a "cooling" procedure of the ground state manifold and propose a frustration degree and a method to quantify constructive and destructive interference effects of entanglement. © 2008 The American Physical Society.
AB - We study frustrated quantum systems from a quantum information perspective. Within this approach, we find that highly frustrated systems do not follow any general "area law" of block entanglement, while weakly frustrated ones have area laws similar to those of nonfrustrated systems away from criticality. To calculate the block entanglement in systems with degenerate ground states, typical in frustrated systems, we define a "cooling" procedure of the ground state manifold and propose a frustration degree and a method to quantify constructive and destructive interference effects of entanglement. © 2008 The American Physical Society.
U2 - 10.1103/PhysRevLett.101.187202
DO - 10.1103/PhysRevLett.101.187202
M3 - Article
SN - 0031-9007
VL - 101
JO - Physical Review Letters
JF - Physical Review Letters
IS - 18
M1 - 187202
ER -