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arXiv · 2502.03093

Stabilizer Entropy and entanglement complexity in the Sachdev-Ye-Kitaev model

Barbara Jasser·Jovan Odavić·Alioscia Hamma
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Abstract

The Sachdev-Ye-Kitaev (SYK) model is of paramount importance for the understanding of both strange metals and a microscopic theory of two-dimensional gravity. We study the interplay between Stabilizer R\'enyi Entropy (SRE) and entanglement entropy in both the ground state and highly excited states of the SYK4+SYK2 model interpolating the highly chaotic four-body interactions model with the integrable two-body interactions one. The interplay between these quantities is assessed also through universal statistics of the entanglement spectrum and its anti-flatness. We find that SYK4 is indeed characterized by a complex pattern of both entanglement and non-stabilizer resources while SYK2 is non-universal and not complex. We discuss the fragility and robustness of these features depending on the interpolation parameter.

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Barbara Jasser, Jovan Odavić, Alioscia Hamma. 2025-02-05. Stabilizer Entropy and entanglement complexity in the Sachdev-Ye-Kitaev model. https://doi.org/10.1103/rz86-47h3

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