Nota de FísicaPublicado
The Physics of the Sagnac-Mashoon Effects
Ivano Damião Soares; Jaime Tiomno
1995
Datos de la publicación
- Autores
- Ivano Damião Soares; Jaime Tiomno
- Tipo
- Nota de Física
- Estado
- Publicado
- Fecha de publicación
- 1995
- Descripción
- We carry out a complete examination of the effects of rotation on the physics of spin-1/2 particles. The origin of these effects is connected to the fact that the frame of the rotating experiment is Fermi-Walker transported, and is related to the inertia rest frame (with respect to which the apparatus rotates with angular velocity <math>\vec{\omega}</math>) by a Lorentz boost with instantaneous velocity <math>\vec{\omega}\wedge \vec{R}</math> plus a time dependent spatial rotation. Two distinct sets of effects are obtained. The first depends on the spin-rotation interaction, and consists of the Mashoon effect and a mass split effect due to the Lorentz boost mentioned above. In a neutron interferometer the latter effect produces a phase shift smaller than the Mashoon phase shift by a factor of order <math>0(v^2/c^2)\!\,</math> , where v is the velocity of the particles in the beams of the interferometer. The detection of the Mashoon effect is crucial to decide if free spin-1/2 particles actually behave a gyroscopes. The second set appears already in the eikonal approximation and is due to the dragging of the particles by the rotating apparatus, boosting the four momentum of the particles; it results in the Sagnac effect. We also discuss a criterion to fix the frame of the experiment among all mathematically admissible frames in the Brill-Wheeler formulation, and show that frames used in the literature to derive the Sagnac-Mashoon effect cannot be physically realized.
- Año
- 1995
- Número
- CBPF-NF-051/95
- Vínculo con tesis
- No
- Vínculo con beca
- No