On the Ground Level of Purely Magnetic Algebro-Geometric 2D Pauli Operator (spin 1/2)

Details On the Ground Level of Purely Magnetic Algebro-Geometric 2D Pauli Operator (spin 1/2) On the Ground Level of Purely Magnetic Algebro-Geometric 2D Pauli Operator (spin 1/2)

2010-04-07

arxiv.org/abs/1004.1157v4

Theoretical and Mathematical Physics, 2010, 164:3, 1110-1127

Physics

Mathematical Physics

Latex 32 pages, in the recent version an Important discussion of the problem concerning Bohm-Aharonov Phenomenon is added. The

Scientific paper

Full manifold of the complex Bloch-Floquet eigenfunctions is investigated for the ground level of the purely magnetic 2D Pauli operators (equal to zero because of supersymmetry). Deep connection of it with the 2D analog of the "Burgers Nonlinear Hierarchy" plays fundamental role here. Everything is completely calculated for the broad class of Algebro-Geometric operators found in this work for this case. For the case of nonzero flux the ground states were found by Aharonov-Casher (1979) for the rapidly decreasing fields, and by Dubrovin-Novikov (1980) for the periodic fields. No Algebro-Geometric operators where known in the case of nonzero flux. For genus $g=1$ we found periodic operators with zero flux, singular magnetic fields and Bohm-Aharonov phenomenon. Our arguments imply that the delta-term really does not affect seriously the spectrum nearby of the ground state. For $g>1$ our theory requires to use only algebraic curves with selected point leading to the solutions elliptic in the variable $x$ for KdV and KP in order to get periodic magnetic fields. The algebro-geometric case of genus zero leads, in particular, to the slowly decreasing lump-like magnetic fields with especially interesting variety of ground states in the Hilbert Space $\cL_2(\bR^2)$.

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