For even convex polynomially bounded dispersion relations, an effective horizon controls the outgoing modes so that Bogoliubov coefficients agree with the tunneling result and the emission spectrum deviates from exact thermality in a controlled way.
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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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Hawking radiation with dispersion: reconciling the Bogoliubov and tunneling approaches
For even convex polynomially bounded dispersion relations, an effective horizon controls the outgoing modes so that Bogoliubov coefficients agree with the tunneling result and the emission spectrum deviates from exact thermality in a controlled way.
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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.