Appleby–Flammia–McConnell–Yard ray class field conjecture for SICs
Let , set , and let . For a Weyl–Heisenberg line-SIC in dimension , let denote its SIC field, and let be the ray class field of with modulus , where for odd and for even . Appleby, Flammia, McConnell, and Yard's conjecture. At least one Weyl–Heisenberg line-SIC has , and every such line-SIC has a finite Galois extension of containing . The two assertions were verified in the cited dimensions and for all currently known SICs there, but remain conjectural in general.
References
Primary source
Gene S. Kopp and Jeffrey C. Lagarias, “SIC-POVMs and orders of real quadratic fields”, arXiv:2407.08048 (2026).
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