Cavity-induced quantum spin liquids

Alessio Chiocchetta (), Dominik Kiese, Carl Philipp Zelle, Francesco Piazza and Sebastian Diehl
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Alessio Chiocchetta: University of Cologne
Dominik Kiese: University of Cologne
Carl Philipp Zelle: University of Cologne
Francesco Piazza: Max Planck Institute for the Physics of Complex Systems
Sebastian Diehl: University of Cologne

Nature Communications, 2021, vol. 12, issue 1, 1-8

Abstract: Abstract Quantum spin liquids provide paradigmatic examples of highly entangled quantum states of matter. Frustration is the key mechanism to favor spin liquids over more conventional magnetically ordered states. Here we propose to engineer frustration by exploiting the coupling of quantum magnets to the quantized light of an optical cavity. The interplay between the quantum fluctuations of the electro-magnetic field and the strongly correlated electrons results in a tunable long-range interaction between localized spins. This cavity-induced frustration robustly stabilizes spin liquid states, which occupy an extensive region in the phase diagram spanned by the range and strength of the tailored interaction. This occurs even in originally unfrustrated systems, as we showcase for the Heisenberg model on the square lattice.

Date: 2021
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DOI: 10.1038/s41467-021-26076-3

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