A family of many-body models which are exactly solvable analytically

Details A family of many-body models which are exactly solvable analytically A family of many-body models which are exactly solvable analytically

2006-07-27

arxiv.org/abs/quant-ph/0607191v1

J.Phys.A40:F601-F608,2007

Physics

Quantum Physics

4 pages, 2 figures; I. F-S published previously under Fuentes-Guridi

Scientific paper

10.1088/1751-8113/40/27/F04

We present a family of many-body models which are exactly solvable analytically. The models are an extended n-body interaction Lipkin-Meshkov-Glick model which considers spin-flip terms which are associated with the interaction of an external classical field which coherently manipulates the state of the system in order to, for example, process quantum information. The models also describe a two-mode Bose-Einstein condensate with a Josephson-type interaction which includes n-particle elastic and inelastic collisions. One of the models corresponds to the canonical two-mode Bose-Einstein Hamitonian plus a term which we argue must be considered in the description of the two-mode condensate. Intriguingly, this extra term allows for an exact and analytical solution of the two-particle collision two-mode BEC problem. Our results open up an arena to study many-body system properties analytically.

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