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• W3102764735 abstract "This work is intended as an attempt to study the nonperturbative renormalization of bound state problem of finitely many Dirac-delta interactions on Riemannian manifolds, S2, H2, and H3. We formulate the problem in terms of a finite dimensional matrix, called the characteristic matrix Φ. The bound state energies can be found from the characteristic equation Φ(−ν2)A=0. The characteristic matrix can be found after a regularization and renormalization by using a sharp cut-off in the eigenvalue spectrum of the Laplacian, as it is done in the flat space, or using the heat kernel method. These two approaches are equivalent in the case of compact manifolds. The heat kernel method has a general advantage to find lower bounds on the spectrum even for compact manifolds as shown in the case of S2. The heat kernels for H2 and H3 are known explicitly, thus we can calculate the characteristic matrix Φ. Using the result, we give lower bound estimates of the discrete spectrum." @default.
• W3102764735 created "2020-11-23" @default.
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• W3102764735 date "2006-08-01" @default.
• W3102764735 modified "2023-10-01" @default.
• W3102764735 title "Finitely many Dirac-delta interactions on Riemannian manifolds" @default.
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• W3102764735 doi "https://doi.org/10.1063/1.2259581" @default.
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