Cavity-induced quantum spin liquids - Kölner UniversitätsPublikationsServer

Chiocchetta, Alessio ORCID: 0000-0003-1782-966X, Kiese, Dominik ORCID: 0000-0002-9263-8022, Zelle, Carl Philipp, Piazza, Francesco ORCID: 0000-0003-1332-6627 and Diehl, Sebastian (2021). Cavity-induced quantum spin liquids. Nat. Commun., 12 (1). BERLIN: NATURE PORTFOLIO. ISSN 2041-1723

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DOI:10.1038/s41467-021-26076-3

Abstract

Quantum spin liquid states are realized in systems with frustrated magnetic interactions. Here, the authors show that tunable frustrated spin-spin interactions can be induced by coupling a quantum antiferromagnet to the quantized light of a driven optical cavity, giving rise to robust quantum spin liquid states. 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.

Item Type:

Journal Article

Creators:

Creators	Email	ORCID	ORCID Put Code
Chiocchetta, Alessio	UNSPECIFIED	orcid.org/0000-0003-1782-966X	UNSPECIFIED
Kiese, Dominik	UNSPECIFIED	orcid.org/0000-0002-9263-8022	UNSPECIFIED
Zelle, Carl Philipp	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
Piazza, Francesco	UNSPECIFIED	orcid.org/0000-0003-1332-6627	UNSPECIFIED
Diehl, Sebastian	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED