Simulations indicate that negative-curvature graphene membranes can form stable analogue horizons whose local density of states exhibits thermal character at a few tens of Kelvin.
Bogoliubov Theor y of acoustic Hawking radiation in Bose-Einstein Condensates
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abstract
We apply the microscopic Bogoliubov theory of dilute Bose-Einstein condensates to analyze quantum and thermal fluctuations in a flowing atomic condensate in the presence of a sonic horizon. For the simplest case of a step-like horizon, closed-form analytical expressions are found for the spectral distribution of the analog Hawking radiation and for the density correlation function. The peculiar long-distance density correlations that appear as a consequence of the Hawking emission features turns out to be reinforced by a finite initial temperature of the condensate. The analytical results are in good quantitative agreement with first principle numerical calculations.
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UNVERDICTED 2representative citing papers
Backreaction in a BEC analog black hole causes the entanglement entropy of Hawking radiation to decrease for sufficiently low energy modes across a wide parameter range.
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Exploring Event Horizons and Hawking Radiation through Deformed Graphene Membranes
Simulations indicate that negative-curvature graphene membranes can form stable analogue horizons whose local density of states exhibits thermal character at a few tens of Kelvin.
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Decrease of the entanglement entropy of the Hawking radiation induced by backreaction in the Bose-Einstein condensate
Backreaction in a BEC analog black hole causes the entanglement entropy of Hawking radiation to decrease for sufficiently low energy modes across a wide parameter range.