“…In a separate development, there has been considerable interest in using the AdS/CFT correspondence to build models of condensed matter physics (for reviews, see [2,3,4,5]). The Schrödinger spacetime, formulated in [6,7] and embedded in string theory in [8,9,10], is of interest due to its isometry group matching the non-relativistic conformal symmetry [11] of certain ultracold gases at unitarity, although a number of issues with the application of the geometry remain (for a recent discussion of some aspects, see for example [12,13,14]).…”