Independent replication of spontaneous Hawking radiation in an atomic condensate · revision history

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Title

Independent replication of spontaneous Hawking radiation in an atomic condensate

Plain

One laboratory has reported that a flowing Bose-Einstein condensate (a gas cooled until its atoms move in lockstep) emits Hawking-like sound from quantum fluctuations alone. The question is whether a second, independent group sees the same emission with the predicted temperature.

Precise

In a quasi-one-dimensional atomic BEC with a stationary sonic horizon (step potential or waterfall configuration), measure the equal-time density-density correlation G2(x, x') and extract the Hawking-partner correlation band across the horizon and its Fourier spectrum. An answer is an observation by a group other than the Technion group at high statistical significance of a stationary correlation band whose spectrum matches $T_{H}=\hbar \kappa/(2\pi)$ for the measured $\kappa$, with stimulated contributions (initial thermal phonons, black-hole-laser amplification, Bogoliubov-Cherenkov emission from obstacles) quantitatively excluded.

Settled by

An independent atomic-BEC experiment reproducing the stationary Hawking correlation band and its spectrum with a measured surface gravity.

Kind

well-posed

Answer type

yes-no

References

(empty)

Literature status

open

Status note

Spontaneous emission has been reported only by Steinhauer's group (2016, 2019, and a 2021 stationarity study); to the extent checked, no independent atomic-BEC replication is reported as of 2026.

Posed since

2016