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Emergent randomness in the Jaynes-Cummings model
KTH, School of Engineering Sciences (SCI), Physics.
2008 (English)In: JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL, ISSN 1751-8113, Vol. 41, no 7, 075304- p.Article in journal (Refereed) Published
Abstract [en]

We consider the well-known Jaynes-Cummings model and ask if it can display randomness. As a solvable Hamiltonian system, it does not display chaotic behaviour in the ordinary sense. Here, however, we look at the distribution of values taken up during the total time evolution. This evolution is determined by the eigenvalues distributed as the square roots of integers and leads to a seemingly erratic behaviour. That this may display a random Gaussian value distribution is suggested by an exactly provable result by Kac. In order to reach our conclusion we use the Kac model to develop tests for the emergence of a Gaussian. Even if the consequent double limits are difficult to evaluate numerically, we find definite indications that the Jaynes-Cummings case also produces a randomness in its value distributions. Numerical methods do not establish such a result beyond doubt, but our conclusions are definite enough to suggest strongly an unexpected randomness emerging in a dynamic time evolution.

Place, publisher, year, edition, pages
2008. Vol. 41, no 7, 075304- p.
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-33356DOI: 10.1088/1751-8113/41/7/075304ISI: 000252912200010Scopus ID: 2-s2.0-38949176303OAI: oai:DiVA.org:kth-33356DiVA: diva2:414663
Note
QC 20110504Available from: 2011-05-04 Created: 2011-05-04 Last updated: 2011-05-04Bibliographically approved

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