Jaynes-Cummings model and a non-commutative geometry: A Few problems noted

Nov, 2004
16 pages
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Abstract:
In this paper we point out that the Jaynes–Cummings model without taking a renonance conditon gives a non–commutative version of the simple spin model (including the pa- rameters x, y and z) treated by M. V. Berry. This model is different from usual non– commutative ones because the x–y coordinates are quantized, while the z coordinate is not. One of new and interesting points in our non–commutative model is that the strings corresponding to Dirac ones in the Berry model exist only in states containing the ground state (F × {|0〉} ∪ {|0〉} × F), while for other excited states (F × F \ F × {|0〉} ∪ {|0〉} × F) they don’t exist. It is probable that a non–commutative model makes singular objects (singular points or singular lines or etc) in the corresponding classical model mild or removes them partly
Note:
  • Latex files, 16 pages. Talk at "Yamagata Conference on Mathematical Sciences" (4~6/November/2004). An appendix added
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