Abstract
The probability distribution of the magnitude C of the curvature 2-form, that underlies the quantum geometric phase and the reaction force of geometric magnetism, is calculated for an ensemble of three-parameter Hamiltonians represented by the gaussian unitary ensemble of N × N matrices. The distributions are determined analytically: exactly for N = 2 and approximately for N ≥ 3, and compared with simulations. The distributions decay asymptotically as 1/C5/2; this is a consequence of the codimension of energy-level degeneracies in the ensemble.
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Communicated by Juerg Martin Froehlich.
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Berry, M.V., Shukla, P. Geometric Phase Curvature Statistics. J Stat Phys 180, 297–303 (2020). https://doi.org/10.1007/s10955-019-02400-6
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DOI: https://doi.org/10.1007/s10955-019-02400-6