Figure 5
Proposed scheme to create a spacetime with a non-diagonal metric. A controlled deformation (e.g., a tilted slab) rotating about the central axis shown in (A) could plausibly induce an asymmetric dependence on heading \(\theta\) for the acceleration magnitude in blue instead of the symmetric counterpart in red. The spacetime metric resulting from this proposed setup would have a non-diagonal component \(g_{t\phi }\).
