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Alternative routes to equivalent classical models of a quantum system |
| M. Radonjić, Slobodan Prvanović, Nikola Burić |
a Shanghai Institute of Applied Mathematics and Mechanics, Shanghai University, Shanghai 200072, China;
b Shanghai Key Laboratory of Mechanics in Energy Engineering, Shanghai University, Shanghai 200072, China |
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Abstract Coarse-graining of some sort is the fundamental and unavoidable step in any attempt to derive the classical mechanical behavior from the quantum formalism. We utilize two-mode Bose-Hubbard model to illustrate how different coarse-grained systems can be naturally associated with a fixed quantum system if it is compatible with different dynamical algebras. Alternative coarse-grained systems generate different evolutions of the same physical quantities, and the difference becomes negligible only in the appropriate macro-limit.
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Received: 30 May 2012
Revised: 03 July 2012
Accepted manuscript online:
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PACS:
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03.65.Fd
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(Algebraic methods)
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03.65.Sq
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(Semiclassical theories and applications)
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| Fund: Project supported by the Ministry of Education and Science of the Republic of Serbia (Grant Nos. 171017, 171028, 171038, and III45016). We would like to acknowledge partial support by COST (Action MP1006). |
Corresponding Authors:
Nikola Burić
E-mail: buric@ipb.ac.rs
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Cite this article:
M. Radonjić, Slobodan Prvanović, Nikola Burić Alternative routes to equivalent classical models of a quantum system 2012 Chin. Phys. B 21 120301
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