Quantum discord and entanglement in Heisenberg XXZ spin chain after quenches

Abstract

Using the adaptive time-dependent density-matrix renormalization group method, the dynamics of entanglement and quantum discord of a one-dimensional spin-1/2 XXZ chain is studied when anisotropic interaction quenches are applied at different temperatures. The dynamics of the quantum discord and pairwise entanglement between the nearest qubits shows that the entanglement and quantum discord will first oscillate and then approach to a constant value. The quantum discord can be used to predict the quantum phase transition, while the entanglement cannot.

4pages,4figures

Cited by in corpus (4)

• Visualizing quantum phase transitions in the XXZ model via the quantum steering ellipsoid
• Various Correlations in Anisotropic Heisenberg XYZ Model with Dzyaloshinski-Moriya Interaction
• Correlation-induced coherence and its use in detecting quantum phase transitions
• Error analysis of the density-matrix renormalization group algorithm for a chain of harmonic oscillators