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Levinson's theorem for Schroedinger operators with point interaction: a
topological approach
release_gbwt6oqewrhglarehiw3yyqpry
by
Johannes Kellendonk,
Serge Richard
Released
as a article
.
2006
Abstract
In this note Levinson theorems for Schroedinger operators in R^n with one
point interaction at 0 are derived using the concept of winding numbers. These
results are based on new expressions for the associated wave operators.
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