|
| related topics |
| {field, particle, equation} |
| {particle, mechanics, theory} |
| {states, state, optimal} |
| {equation, function, exp} |
| {phase, path, phys} |
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On the role of Spin in Quantum Mechanics
S. Esposito
abstract: From the invariance properties of the Schrodinger equation and the isotropy
of space we show that a generic (non-relativistic) quantum system is endowed
with an ``external'' motion, which can be interpreted as the motion of the
centre of mass, and an ``internal'' one, whose presence disappears in the
classical limit. The latter is caused by the spin of the particle, whatever is
its actual value (different from zero). The quantum potential in the
Schrodinger equation, which is responsible of the quantum effects of the
system, is then completely determined from the properties of the internal
motion, and its ``unusual'' properties have a simple and physical explanation
in the present context. From the impossibility to fix the initial conditions
relevant for the internal motion follows, finally, the need of a probabilistic
interpretation of quantum mechanics.
- oai_identifier:
- oai:arXiv.org:quant-ph/9902019
- categories:
- quant-ph hep-ph hep-th
- comments:
- latex, 13 pages; to be published in Found. Phys. Lett
- arxiv_id:
- quant-ph/9902019
- journal_ref:
- Found.Phys.Lett. 12 (1999) 165-177
- report_no:
- DSF-98/15, INFN-NA-IV-98/15
- created:
- 1999-02-05
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