Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2003-02-28
Mod.Phys.Lett. A18 (2003) 2795-2806
Physics
High Energy Physics
High Energy Physics - Theory
LaTeX, 12 pages, minor changes in the title and text, references expanded, version to appear in Mod. Phys. Lett. A
Scientific paper
10.1142/S0217732303012350
We discuss the dynamics of a particular two-dimensional (2D) physical system in the four dimensional (4D) (non-)commutative phase space by exploiting the consistent Hamiltonian and Lagrangian formalisms based on the symplectic structures defined on the 4D (non-)commutative cotangent manifolds. The noncommutativity exists {\it equivalently} in the coordinate or the momentum planes embedded in the 4D cotangent manifolds. The signature of this noncommutativity is reflected in the derivation of the first-order Lagrangians where we exploit the most general form of the Legendre transformation defined on the (non-)commutative (co-)tangent manifolds. The second-order Lagrangian, defined on the 4D {\it tangent manifold}, turns out to be the {\it same} irrespective of the noncommutativity present in the 4D cotangent manifolds for the discussion of the Hamiltonian formulation. A connection with the noncommutativity of the dynamics, associated with the quantum groups on the q-deformed 4D cotangent manifolds, is also pointed out.
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