Two phases of the noncommutative quantum mechanics

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Abstract

We consider quantum mechanics on the noncommutative plane in the presence of magnetic field B. We show, that the model has two essentially different phases separated by the point Bθ = ch2/e, where θ is a parameter of noncommutativity. In this point the system reduces to exactly-solvable one-dimensional system. When κ = 1 - eBθ/ch2 < 0 there is a finite number of states corresponding to the given value of the angular momentum. In another phase, i.e., when κ > 0 the number of states is infinite. The perturbative spectrum near the critical point κ = 0 is computed. © 2001 Elsevier Science B.V. All rights reserved.

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Bellucci, S., Nersessian, A., & Sochichiu, C. (2001). Two phases of the noncommutative quantum mechanics. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 522(3–4), 345–349. https://doi.org/10.1016/S0370-2693(01)01304-1

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