1110.0442 (Wen-Long You)

Quantum Correlation in One-dimensional Extend Quantum Compass Model    [PDF]

Wen-Long You

We study the correlations in the one-dimensional extended quantum compass
model in a transverse magnetic field. By exactly solving the Hamiltonian, we
find that the quantum correlation of the ground state of one-dimensional
quantum compass model is vanishing. We show that quantum discord can not only
locate the quantum critical points, but also discern the orders of phase
transitions. Furthermore, entanglement quantified by concurrence is also
compared.

View original: http://arxiv.org/abs/1110.0442