Efeitos de flutuação do campo magnetico no interferometro de Stern-Gerlach
AUTOR(ES)
Rodrigo do Valle Navarro
DATA DE PUBLICAÇÃO
1998
RESUMO
Spin coherence experiments with particle beams under magnetic fields are investigated taking into account uncontrollable fluctuations. At the same time specific sources for those fluctuations are pointed in terms of characteristic parameters of experimental apparatus. Two kind of fluctuations sources are analyzed: quantum electromagnetic field thermal fluctuations and current fluctuations in the magnetic field generating circuit. In the first case approximated methods were used obtaining underdamped oscillations for mean values of spin components normal to the macroscopic field. The computed damping constant value however, was negligible. In the other case the dynamics was solved exactly showing that spin degree decoherence depends on the circuit specific parameters
ASSUNTO(S)
ACESSO AO ARTIGO
http://libdigi.unicamp.br/document/?code=vtls000188758Documentos Relacionados
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