Impediments to mixing classical and quantum dynamics
| Autor: | J. Caro, L. L. Salcedo |
|---|---|
| Rok vydání: | 1999 |
| Předmět: |
Physics
Quantum Physics Quantum discord Quantum dynamics High Energy Physics::Phenomenology FOS: Physical sciences Observable Expectation value Atomic and Molecular Physics and Optics Theoretical physics Classical mechanics Quantum process Quantum operation Quantum Physics (quant-ph) Quantum dissipation Quantum fluctuation |
| Zdroj: | Physical Review A. 60:842-852 |
| ISSN: | 1094-1622 1050-2947 |
| DOI: | 10.1103/physreva.60.842 |
| Popis: | The dynamics of systems composed of a classical sector plus a quantum sector is studied. We show that, even in the simplest cases, (i) the existence of a consistent canonical description for such mixed systems is incompatible with very basic requirements related to the time evolution of the two sectors when they are decoupled. (ii) The classical sector cannot inherit quantum fluctuations from the quantum sector. And, (iii) a coupling among the two sectors is incompatible with the requirement of physical positivity of the theory, i.e., there would be positive observables with a non positive expectation value. RevTex, 21 pages. Title slightly modified and summary section added |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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