A general perturbation theory for local quantum uncertainty is derived and applied in linear response to show that driving frequency can resonantly enhance quantum discord without entanglement in a two-spin Heisenberg model.
Stinchcombe, Kubo and zubarev formulations of re- sponse theory, Correlation Functions and Quasiparticle Interactions in Condensed Matter , 3 (1978)
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General perturbation theory for local quantum uncertainty and its formulation in the linear-response regime
A general perturbation theory for local quantum uncertainty is derived and applied in linear response to show that driving frequency can resonantly enhance quantum discord without entanglement in a two-spin Heisenberg model.