Auerbach, A, Kivelson, S and Nicole, D A
Path Decomposition for Multidimensional Tunnelling.
Physical Review Letters, 53, (5), .
In order to solve multidimensionaltunneling problems that cannot be treated by the normal instanton techniques, we introduce the path decomposition expansion formalism, and show its usefulness by solving three generic examples: the symmetric and asymmetric double well, and the decay problem. The technique allows us to handle excited states and backscattering effects in nonseparable potentials.
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