Abstract
Magnetic fields in terrestrial experiments have only tiny effects on the ground-state properties of conventional atoms. The reason is that the natural atomic unit for magnetic field strength, B 0= m 2 e 3 c/ħ3 = 2.35 × 105 Tesla, is enormous compared with laboratory fields, which are seldom larger than 10 T. Here m denotes the electron mass, e the elementary charge, and ħ and c have their usual meaning. The unit B 0 is the field strength B at which the magnetic length ℓ B = (ħc/(eB))1/2 (~ cyclotron radius for an electron in the lowest Landau level) is equal to the Bohr radius a0 = ħ 2 /(me 2). Equivalently, at B = B 0 the Landau energy ħω B , with ω B = eB/(mc) the cyclotron frequency, becomes equal to the Rydberg energy e 2 /a 0. For B ≪ B 0 distortions of ground-state wave functions and energy level shifts due to the magnetic field will therefore be small, and their standard treatment by means of perturbation theory is completely adequate.
This is the text of a lecture given by J. Yngvason at the XIth International Congress of Mathematical Physics, Paris 1994. It appeared originally in the proceedings of the congress, ed. by D. Iagolnitzer, pp. 185–205, International Press 1995, but has been updated and slightly expanded for the present publication. It summarizes the joint work [2], [3] and [5] of the three authors and is presented here in lieu of [2] and [3] which are too long to be included in this volume.
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Lieb, E.H., Solovej, J.P., Yngvason, J. (2001). Asymptotics of Natural and Artificial Atoms in Strong Magnetic Fields. In: Thirring, W. (eds) The Stability of Matter: From Atoms to Stars. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-04360-8_13
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