Renormalized Contact Potential in Two Dimensions

Details Renormalized Contact Potential in Two Dimensions Renormalized Contact Potential in Two Dimensions

1997-10-07

arxiv.org/abs/hep-th/9710061v1

J.Math.Phys. 39 (1998) 749-759

Physics

High Energy Physics

High Energy Physics - Theory

Plain Tex

Scientific paper

We obtain for the attractive Dirac delta-function potential in two-dimensional quantum mechanics a renormalized formulation that avoids reference to a cutoff and running coupling constant. Dimensional transmutation is carried out before attempting to solve the system, and leads to an interesting eigenvalue problem in N-2 degrees of freedom (in the center of momentum frame) when there are N particles. The effective Hamiltonian for N-2 particles has a nonlocal attractive interaction, and the Schrodinger equation becomes an eigenvalue problem for the logarithm of this Hamiltonian. The 3-body case is examined in detail, and in this case a variational estimate of the ground-state energy is given.

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