Holmlid notably uses laser pulses in the 532 nm spectra to form ultra dense hydrogen or deuterium. As it turns out, the same greenish spectra of the laser has also been used to form the breakthrough material which has been called "the first room temperature superconductor" a few months ago ( Note that there have been numerous other strong claims for this breakthrough before, but Wiki sez this one is the first - although it is not clear who has replicated the work).
https://en.wikipedia.org/wiki/Carbonaceous_sulfur_hydride Anyway ... the point of this post being that laser irradiation at this exact frequency 532 nm also turns up in another disparate situations where hydrogen densification is apparent. Previously with the Holmlid work, observers thought or assumed that the greenis laser spectra related to irradiation of the catalyst, not the hydrogen itself. The RTSC work would seem to indicate that it is the hydrogen which is responding to the photons not the catalyst, which although coherent (the wavelength) is spatially way out of proportion to interact with atoms of hydrogen... many orders of magnitude difference, in fact. Somehow, I get the strange feeling that this detail - the identical laser wavelength used to activate hydrogen, is not coincidental... Jones