Figure 2: Experiments and numerics studying the dynamics of analogue rotating boson stars.
From: Optical analogues of the Newton–Schrödinger equation and boson star evolution
(a) The real-space intensity distribution I(x, 0, P) of a vortex beam with 
over a propagation distance of 400 mm maps the stable time evolution of a rotating boson star. (b) The spatial-frequency spectrum is centred around a value σ K⊥∼20, and importantly does not contract to a value smaller than this at any point during the evolution. (c,d) The numerical simulation of boson star evolution, where c is the real-space intensity distribution and d, the product of the nonlocal length and transverse K⊥ vector, σ K⊥. While c confirms that varying the power reasonably reproduces the evolution as a function of distance, d shows that throughout the entire evolution of the vortex beam, σ K⊥ remains sufficiently large to reproduce the NSE and therefore simulate a rotating boson star.
