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Universe 2017, 3(1), 23; doi:10.3390/universe3010023

Thermally Induced Effective Spacetimes in Self-Assembled Hyperbolic Metamaterials

Electrical and Computer Engineering Department, University of Maryland, College Park, MD 20742, USA
Academic Editor: Øyvind Grøn
Received: 9 January 2017 / Revised: 23 February 2017 / Accepted: 2 March 2017 / Published: 8 March 2017
(This article belongs to the Special Issue Inflationary Universe Models: Predictions and Observations)
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Abstract

Recent developments in gravitation theory indicate that the classic general relativity is an effective macroscopic theory which will be eventually replaced with a more fundamental theory based on thermodynamics of yet unknown microscopic degrees of freedom. Here we consider thermodynamics of an effective spacetime which may be formed under the influence of an external magnetic field in a cobalt ferrofluid. It appears that the extraordinary photons propagating inside the ferrofluid perceive thermal gradients in the ferrofluid as an effective gravitational field, which obeys the Newton law. Moreover, the effective de Sitter spacetime behaviour near the metric signature transition may mimic various cosmological inflation scenarios, which may be visualized directly using an optical microscope. Thus, some features of the hypothetic microscopic theory of gravity are illustrated in the ferrofluid-based analogue models of inflation. View Full-Text
Keywords: analog gravity; metamaterial; inflation analog gravity; metamaterial; inflation
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Smolyaninov, I.I. Thermally Induced Effective Spacetimes in Self-Assembled Hyperbolic Metamaterials. Universe 2017, 3, 23.

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