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Demonstrates minisuperspace reduction in quantum cosmology, suggesting new structural insights.
The minisuperspace Wheeler–DeWitt equation for a two-field vacuum system — a radial Kähler modulus and an angular axion in a landscape potential — reduces from a three-variable PDE to a one-variable ODE plus an integer quantum number, through exact U(1) factorisation (valid to 10⁻¹²²) and Friedmann-constraint elimination. Nine structural results follow, including a selection rule under which transient expansion features exist only for nonzero quantum number, and identification of the axion with a conifold complex-structure mode of mass ≈ 2.3 H₀, implying a single DESI peak.
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Abraham J. Letter (2026) studied this question.
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