Subsystems and independence in relativistic microscopic physics. (English) Zbl 1228.81048
Summary: The analyzability of the universe into subsystems requires a concept of the “independence” of the subsystems, of which the relativistic quantum world supports many distinct notions which either coincide or are trivial in the classical setting. The multitude of such notions and the complex relations between them will only be adumbrated here. The emphasis of the discussion is placed upon the warrant for and the consequences of a particular notion of subsystem independence, which, it is proposed, should be viewed as primary and, it is argued, provides a reasonable framework within which to sensibly speak of relativistic quantum subsystems.
MSC:
| 81P05 | General and philosophical questions in quantum theory |
| 46L60 | Applications of selfadjoint operator algebras to physics |
| 81P15 | Quantum measurement theory, state operations, state preparations |
| 81R15 | Operator algebra methods applied to problems in quantum theory |
| 83A05 | Special relativity |
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