The spacings between quasi-Landau resonances

Near the threshold, the two expressions for the magnetic energy should be equal, whence 

A more rigorous argument is given by Rau [575]. Along z = 0 the potential is V(p) = —Ze2/(A-Keop) + %muj2p2, where p2 = x2 + y2. The quantisation condition is 

provided V is of such a form that it vanishes at some finite po 

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