Geodesic
Isochronous systems and their quantization
Teoretičeskaâ i matematičeskaâ fizika, Tome 152 (2007) no. 1, pp. 5-19

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We review recent results about classical isochronous systems characterized by the presence of an open (hence fully dimensional) region in their phase space in which all their solutions are completely periodic (i.e., periodic in all degrees of freedom) with the same fixed period (independent of the initial data provided they are inside the isochronicity region). We report a technique for generating such systems, whose wide applicability justifies the statement that isochronous systems are not rare. We also present an analogous technique applicable to a vast class of Hamiltonian systems and generating isochronous Hamiltonian systems. We also report some results concerning the quantized versions of such systems.
Keywords: integrable system
Mots-clés : isochronous system, quantization. 
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     author = {F. Calogero},
     title = {Isochronous systems and their quantization},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
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     publisher = {mathdoc},
     volume = {152},
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     year = {2007},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_2007_152_1_a0/}
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F. Calogero. Isochronous systems and their quantization. Teoretičeskaâ i matematičeskaâ fizika, Tome 152 (2007) no. 1, pp. 5-19. http://geodesic.mathdoc.fr/item/TMF_2007_152_1_a0/