Diagnosing quantum phases using long-range two-site quantum resource behavior

Lin-Lin Su

doi:10.1103/PhysRevB.110.104101

Diagnosing quantum phases using long-range two-site quantum resource behavior

2024-09-03

0

PRE

AI

DOI：10.1103/PhysRevB.110.104101

Original

Original request for help

Save

Abstract

En 中文

We propose and demonstrate that the behaviors of long-range, two-site quantum resources can effectively diagnose quantum phases. In an XX spin chain with symmetry-breaking quantum phase transitions, we reveal that the gradually decaying and damped oscillating modes of quantum coherence or quantum discord, along with two-site distance, can identify two spin-liquid phases, respectively. Moreover, based on our analytical results of spin correlation functions, we confirm the existence of long-range entanglement in the system and establish a connection between two-site entanglement and quantum phases. Furthermore, for the extended Ising model with topological phase transitions, we find that coherence and quantum discord behaviors can also signify topological quantum phases. In particular, we discover the quantum resource freezing phenomenon, where topologically protected long-range quantum resources may have potential applications in quantum information processing.

Keywords:

STATISTICAL-MECHANICS

SUDDEN-DEATH

XY-MODEL

ENTANGLEMENT

DISCORD

DIAGRAM

STATE

Diagnosing quantum phases using long-range two-site quantum resource behavior

Abstract

Journal

Organization