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Showing 1 to 3 of 3 for “"Tunneleffekt"”.
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Quantum breathers in small networks: Dynamics, tunneling, correlations, and application to Josephson cells
We address the excitation of quantum breathers in small nonlinear networks of two and three degrees of freedom, in order to study their properties. The invariance under permutation of two sites of these networks substitutes the translation invariance that is present in nonlinear lattices, where …
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Semiclassical spectral analysis of discrete Witten Laplacians
A discrete analogue of the Witten Laplacian on the n-dimensional integer lattice is considered. After rescaling of the operator and the lattice size we analyze the tunnel effect between different wells, providing sharp asymptotics of the low-lying spectrum. Our proof, inspired by work of B. …