A Grassmann phase-space Lp norm defines a computable hybrid magic proxy for boson-fermion systems, with a closed-form magic power for the conditional displacement gate.
Magic Entropy in Hybrid Spin-Boson Systems
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abstract
We introduce entropic measures to quantify non-classical resource in hybrid spin-boson systems. We discuss the stabilizer R\'enyi 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 dynamics of magic in the Jaynes-Cummings model following a quench. We develop a Monte Carlo numerical scheme to enable practical computation in many-body examples.
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Magic for Hybrid Boson-Fermion Systems: A Grassmann Phase-Space Approach
A Grassmann phase-space Lp norm defines a computable hybrid magic proxy for boson-fermion systems, with a closed-form magic power for the conditional displacement gate.