Small-ray-class-field conjecture for SIC fiducials

Let d=n2+3=pd=n^2+3=p be a prime in the specified sequence, let KK be the real quadratic base field, and let Ψ^\hat{\Psi} be the un-normalized SIC fiducial with components xjx_j. The two small ray class fields are the ray class fields of KK with finite moduli d+1+1\sqrt{d+1}+1 and d+11\sqrt{d+1}-1. Small-ray-class-field conjecture. The components of Ψ^\hat{\Psi} generate one of these two small ray class fields. This conjecture identifies the smaller abelian field expected to contain the fiducial components, whose intersection with the cyclotomic subfield is trivial.

Sources & referencesView supporting material

Primary source

Marcus Appleby, Ingemar Bengtsson, Markus Grassl, Michael Harrison and Gary McConnell, “SIC-POVMs from Stark units: Prime dimensions n^2+3”, arXiv:2112.05552 (2022).

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