Stern Gerlach
Mostrando 1-10 de 10 artigos, teses e dissertações.
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1. Mecánica cuántica fundamental, una propuesta didáctica
Fundamental quantum mechanics (FQM) is a commented presentation of fundamental experiments and concepts of quantum mechanics, the physical theory of the quantum phenomena domain: superposition principle and quantum entanglement become the cornestone of the theoretical foundation of the quantum description. The formalism of these basic notions, for two-level
Rev. Bras. Ensino Fís.. Publicado em: 2014-03
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2. O experimento de Stern-Gerlach e o spin do elétron: um exemplo de quasi-história
Nossa proposta neste trabalho é utilizar o conceito de quasi-história como perspectiva de análise para a forma de apresentação didática de conteúdos de física. Pretendemos mostrar as transformações sofridas pelo conhecimento, desde os primeiros registros até a forma como ele aparece nos livros didáticos. O conteúdo a ser trabalhado é o experime
Revista Brasileira de Ensino de Física. Publicado em: 2011-06
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3. Sobre o ensino do conceito de estado em cursos introdutórios de mecânica quântica
Apresenta-se um estudo desenvolvido em três etapas com o intuito de analisar as principais dificuldades de compreensão pelos alunos de dois importantes conceitos da Mecânica Quântica (MQ): estado quântico e superposição linear. As três etapas da pesquisa consistiram em: elaboração, implementação e avaliação de uma proposta em três minicursos e
Publicado em: 2009
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4. Decoerencia em uma experiencia de Stern-Gerlach dissipativa
Not informed
Publicado em: 2004
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5. Construction of exact solutions for the Stern-Gerlach effect
We obtain exact solutions for the Schrödinger-Pauli matrix equation for a neutral particle of spin 1/2 in a magnetic eld with a field gradient. The analytical wavefunctions are written on the symmetry plane Y = 0, which contains the incident and splitted beams, in terms of the Airy functions. The time-evolution of the probability densities, |
Braz. J. Phys.. Publicado em: 2001-09
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6. Efeitos de flutuação do campo magnetico no interferometro de Stern-Gerlach
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 fluctu
Publicado em: 1998
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7. Continuous Stern-Gerlach effect: Principle and idealized apparatus
A nondestructive type of Stern-Gerlach effect for an individual electron is described that has been thoroughly demonstrated in experiments at the University of Washington. This “continuous Stern-Gerlach effect” makes use of an inhomogeneous magnetic field provided by a weak auxiliary magnetic bottle and is nondestructive in contrast to all previous versi
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8. Continuous Stern-Gerlach effect: Noise and the measurement process
This paper resumes the discussion of the continuous Stern-Gerlach effect, a method to continuously and nondestructively determine the spin state of the same individual electron, quasipermanently confined in a Penning trap in ultrahigh vacuum at liquid helium temperatures. Here the focus is on limitations to spin-state detection due to thermal and zero-point
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9. Geonium "K" experiment using spin dependency of cyclotron frequency supports g data of earlier geonium "S" work.
By substituting the relativistic spin state dependence of the cyclotron frequency for the continuous Stern-Gerlach effect and running the geonium atom as a microsynchrocyclotron accelerator we have detected spin flips of the individual trapped electron. In our initial efforts we have been able to obtain a simple symmetric spin resonance about 4-fold narrower
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10. Relativistic cyclotron resonance shape in magnetic bottle geonium
The thermally excited axial oscillation of the electron through the weak magnetic bottle needed for the continuous Stern-Gerlach effect modulates the cyclotron frequency and produces a characteristic ≈ 12-kHz-wide vertical rise-exponential decline line shape of the cyclotron resonance. At the same time the relativistic mass shift decreases the frequency by