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Can experimentally-accessible measures of entanglement distinguish quantum spin liquids from disorder-driven "random singlet" phases ?

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arxiv 2505.11874 v1 pith:QC7MA5V2 submitted 2025-05-17 cond-mat.str-el

Tokuro Shimokawa , Snigdh Sabharwal , Nic Shannon This is my paper · ORCID
classification cond-mat.str-el
keywords entanglementquantumspinliquidsdisorder-drivendistinguishexperimentally-accessiblemeasures
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abstract

At the theoretical level, quantum spin liquids are distinguished from other phases of matter by their entanglement properties. However, since the usual measure of entanglement, entanglement entropy, cannot accessed in experiment, indentifying quantum spin liquids in candidate materials remains an acute problem. Here we show other, experimentally-accessible, measures of entanglement can be used to distinguish a quantum spin liquid from a competing disorder-driven "random singlet" phase, in a model of a disordered antiferromagnet on a triangular lattice. The application of these results to the triangular-lattice systems YbZnGaO$_4$, YbZn$_2$GaO$_5$ and KYbSe$_2$ is discussed.

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Cited by 3 Pith papers

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  1. Precise computation of universal corner entanglement entropy at 2+1 dimension: From Ising to Gaussian quantum critical points

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    Bubble-basis projector QMC extracts the universal corner log-coefficient of Rényi entanglement entropy at (2+1)d Ising and Gaussian quantum critical points as 0.020(1) and 0.025(1), the latter matching the analytic va...

  2. Quantum Fisher Information as a Thermal Probe in Frustrated Magnets through Insights from Quantum Spin Ice

    cond-mat.str-el 2025-10 conditional novelty 7.0 of 10

    Quantum Fisher information computed for the pyrochlore quantum-spin-ice model maps its phase diagram and thermal crossover scales, establishing it as a thermal/dynamical probe accessible to neutron scattering.

  3. Coexistence of anomalous spin dynamics and weak magnetic order in a chiral trillium lattice K2FeSn(PO4)3

    cond-mat.str-el 2025-07 conditional novelty 6.0 of 10

    In the diluted trillium-lattice compound K2FeSn(PO4)3, weak magnetic order at TN ≈ 2 K coexists with persistent, field-resilient spin dynamics in zero and 3.4 T fields.

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