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Magic entropy in hybrid spin-boson systems
Samuel Crew1, Ying-Lin Li1, Heng-Hsi Li1
1Department of Physics, National Tsing Hua University, Hsinchu 30013, Taiwan.
Abstract:
We introduce entropic measures to quantify non-classical resource in hybrid spin-boson systems. We discuss the stabiliser Rényi entropy in the framework of phase space quantisation and define an analogous hybrid magic entropy and a mutual magic entropy that capture the distribution of quantum magic across spin and bosonic subsystems. We use these entropic measures to demonstrate two key phenomena: the detection of the superradiant phase transition in the Dicke model and the quantum dynamics of magic in the Jaynes-Cummings model. We develop a Monte Carlo numerical scheme to practically evaluate these entropic measures in interacting many-body systems.
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