Floquet central spin model: A platform to realize time crystals, entanglement steering, and multiparameter metrology
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The paper directly characterizes a periodically driven interacting spin model supporting exact revivals, discrete time-crystal behavior, and interaction-induced echo dynamics.
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Author(s): Hillol Biswas and Sayan Choudhury We propose and characterize protocols to engineer exact quantum revivals, discrete time crystals (DTCs), and entanglement oscillations in the periodically driven central spin model. While period-doubling DTCs have been observed in this system before, we uncover a unifying interaction-induced echo me… [Phys. Rev. B 114, L140303] Published Wed Sep 16, 2026