@article{ISI:000080461300009,
 abstract = {We study perturbation theory in certain quantum mechanics problems in
one dimension in which the perturbing potential diverges at some points,
even though the energy eigenvalues are smooth functions of the
coefficient of the potential. We discuss some of the unusual techniques
which are required to obtain perturbative expansions of the energies in
such cases. These include a point-splitting prescription with a delta ``
function for expanding around the Dirichlet (fermionic) limit of the
delta function potential, and performing a similarity transformation to
a non-Hermitian potential in the Calogero-Sutherland model. As an
application of the first technique, we study the ground state of the
delta function Bose gas near the fermionic limit.},
 author = {Sen, D},
 doi = {10.1142/S0217751X99000919},
 issn = {0217-751X},
 journal = {INTERNATIONAL JOURNAL OF MODERN PHYSICS A},
 month = {APR 30},
 number = {11},
 pages = {1789-1807},
 times-cited = {20},
 title = {Perturbation theory for singular potentials in quantum mechanics},
 unique-id = {ISI:000080461300009},
 volume = {14},
 year = {1999}
}