Dans l'article sur phys.org il y a clairement marqué:
But of course, no one has yet found any sort of mirror that might be used to reflect gravity."
Dans l'article d'arXiv:
Recently however, there have been suggestions that the
properties of quantum fluids (superconductors, superflu-
ids, quantum Hall fluids, Bose-Einstein condensates) may
enhance the interaction with gravitational waves (GW).
The novel effects of the interaction of a gravitational field
with a quantum fluid was first investigated by DeWitt [4]
and Papini [5], who calculated that a Lense-Thirring field
should induce a current in the superconductor. Following
this, further analyses were made into the interaction of
GW with superconductors [6, 7], proposing superfluids
as a medium for gravitational antennae [8], supercon-
ducting circuits as GW detectors [9], transducers [10, 11]
and mirrors [12]. These idea have not been met without
controversy [13, 14]. Although a few experiments have
attempted to test the proposed enhanced GW interac-
tion [15, 16], none have produced clear and unambiguous
outcomes.
Donc tu as plus qu'a te taper la source 13 et 14 pour savoir pourquoi c'est controversé. xD
Bon d’après les résultats du papier l'effet casimir gravitationnel est bien supérieur à l'effet casimir EM si (et y a beaucoup de si incertain je pense) leur materiaux (plomb à 0°K, qu'il n'arriverons jamais à refroidir à cette température…) interagit bien avec les ondes gravitationnel, si la susceptibilité du plomb estimé est bien la bonne, si l'approximation GEM est bonne dans ce cas…
Mais sinon leur courbe en fin d'article semble prometteuse tous de même !