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Analogue black holes in relativistic BECs: Mimicking Killing and universal horizons

Bethan Cropp*

Stefano Liberati† and Rodrigo Turcati‡

  • SISSA, Via Bonomea 265, 34136 Trieste, Italy; INFN sezione di Trieste, Via Valerio 2, 34127 Trieste, Italy; and School of Physics, Indian Institute of Science Education and Research Thiruvananthapuram (IISER-TVM), Trivandrum 695016, India

  • SISSA, Via Bonomea 265, 34136 Trieste, Italy and INFN sezione di Trieste, Via Valerio 2, 34127 Trieste, Italy

  • *bcropp@issertvm.ac.in
  • †stefano.liberati@sissa.it
  • ‡rturcati@sissa.it
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Phys. Rev. D 94, 063003 – Published 8 September, 2016

DOI: https://doi.org/10.1103/PhysRevD.94.063003

Abstract

Relativistic Bose-Einstein condensates (rBECs) have recently become a well-established system for analogue gravity. Indeed, while such relativistic systems cannot be yet realized experimentally, they provide an interesting framework for mimicking metrics for which no analogue is yet available, thus paving the way for further theoretical and numerical explorations. In this vein, we here discuss black holes in rBECs and explore how their features relate to the bulk properties of the system. We then propose the coupling of external fields to the rBEC as a way to mimic nonmetric features. In particular, we use a Proca field to simulate an aether field, as found in Einstein-aether or Hořava-Lifshitz gravity. This allows us to mimic a universal horizon, the causal barrier relevant for superluminal modes in these modified gravitational theories.

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Phys. Rev. D 94, 063003– Published 8 September, 2016
  • Received 13 June 2016

© 2016 American Physical Society

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