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  • Letter
  • Open Access

Thermodynamics of analogue black holes in a non-Hermitian tight-binding model

D. F. Munoz-Arboleda1,*, M. Stålhammar1,2, and C. Morais Smith1

  • *Contact author: d.f.munozarboleda@uu.nl
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Phys. Rev. B 113, L081110 – Published 26 February, 2026

DOI: https://doi.org/10.1103/vdsx-r3dq

Abstract

We present a non-Hermitian model with gain/loss and nonreciprocal next-nearest-neighbor hopping that emulates black-hole physics. The model describes a one-dimensional lattice with a smooth connection between regions with distinct hopping parameters. By mapping the system to an effective Schwarzschild metric in the Painlevé-Gullstrand coordinates, we find that the interface is an analogue to a black-hole event horizon. We obtain emission rates for particles and antiparticles, the Hawking temperature, the Bekenstein-Hawking entropy, and the mass of the analogue black hole as a function of the interface sharpness and the system parameters. An experimental realization of the theoretical model is proposed, thus opening the way to the detection of elusive black-hole features.

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Phys. Rev. B 113, L081110– Published 26 February, 2026
  • Received 11 July 2025
  • Accepted 22 January 2026
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