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Quantum Dynamical Simulation of a Transversal Stern--Gerlach Interferometer | | Mikołaj M. Paraniak
; Berthold-Georg Englert
; | | Date: |
1 Jun 2021 | | Abstract: | Originally conceived as a gedankenexperiment, an apparatus consisting of two
Stern--Gerlach apparatuses joined in an inverted manner touched on the
fundamental question of the reversibility of evolution in quantum mechanics.
Theoretical analysis showed that uniting the two partial beams requires an
extreme level of experimental control, making the proposal in its original form
unrealizable in practice. In this work we revisit the above question in a
numerical study concerning the possibility of partial-beam recombination in a
spin-coherent manner. Using the Suzuki--Trotter numerical method of wave
propagation and a configurable, approximation-free magnetic field, a simulation
of a transversal Stern--Gerlach interferometer under ideal conditions is
performed. The result confirms what has long been hinted at by theoretical
analyses: the transversal Stern--Gerlach interferometer quantum dynamics is
fundamentally irreversible even when perfect control of the associated magnetic
fields and beams is assumed. | | Source: | arXiv, 2106.00205 | | Services: | Forum | Review | PDF | Favorites | |
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