Steering spin fluctuations in lattice systems via two-tone Floquet engineering

• URL: http://arxiv.org/abs/2401.03889v2
• Date: Tue, 24 Dec 2024 00:01:46 GMT
• Title: Steering spin fluctuations in lattice systems via two-tone Floquet engineering
• Authors: Ruben Peña, Felipe Torres, Guillermo Romero,
• Abstract summary: We consider a one-dimensional spin-1/2 lattice with periodically modulated spin exchanges using parametric resonances. The stroboscopic dynamics generated from distributed spin exchange modulations lead to spin pair fluctuations reaching quasi-maximally correlated states. We present a protocol to control the interacting many-body dynamics, producing spatial and temporal localization of correlated spin pairs.
• Score: 1.2289361708127877
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• Abstract: We report on the control of spin pair fluctuations using two-tone Floquet engineering. We consider a one-dimensional spin-1/2 lattice with periodically modulated spin exchanges using parametric resonances. The stroboscopic dynamics generated from distributed spin exchange modulations lead to spin pair fluctuations reaching quasi-maximally correlated states and a subharmonic response in local observables, breaking the discrete-time translational symmetry. We present a protocol to control the interacting many-body dynamics, producing spatial and temporal localization of correlated spin pairs via dynamically breaking correlated spin pairs from the edges towards the center of the lattice. Our result reveals how spin fluctuations distribute in a heterogeneous lattice depending on parametric resonances. This may open new routes for exploring distinct nonequilibrium states of matter and the conduction of quasiparticles in quantum materials.

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