One-way deficit and quantum phase transitions in XY model and extended Ising model

Originating in questions regarding work extraction from quantum systems coupled to a heat bath, the quantum deficit, a kind of quantum correlations in addition to entanglement and quantum discord, links quantum thermodynamics with quantum information theory. In this paper, we investigate the one-way deficit of two adjacent spins in the bulk of the XY model and the extended Ising model. We find that the one-way deficit susceptibility is able to characterize quantum phase transitions in the XY model and even topological phase transitions in the extend Ising model. This study will enlighten extensive studies of quantum phase transitions from the perspective of quantum information processing and quantum computation, including finite-temperature phase transitions, topological phase transitions, and dynamical phase transitions in a variety of quantum many-body systems.