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quant-ph1998
Gauge transformations for a driven quantum particle in an infinite square well
Stefan Weigert
Quantum mechanics of a particle in an infinite square well under the influence of a time-dependent electric field is reconsidered. In some gauge, the Hamiltonian depends linearly o…
quant-ph1998
Reconstruction of spin states and its conceptual implications
Stefan Weigert
State reconstruction for quantum spins is reviewed. Emphasis is on non-tomographic approaches which are based on measurements performed with a Stern-Gerlach apparatus. Two conseque…