Born January 19, 1950, Gdansk, Poland

Professor, Department of Physics and Astronomy, University of Delaware, USA

Email:szalewic@udel.edu

Web: external link

Visiting Fellow, Joint Institute for Laboratory Astrophysics, University of Colorado (1995–1996), Fellow, American Physical Society (2000), Member, Franklin Award Committee (2001–).

About 270 scientific publications in Physics and Chemistry

**Intermolecular forces**:
development of a new approach to intermolecular forces,
known as symmetry-adapted perturbation theory (SAPT),
starting from isolated monomers and imposing the correct
permutation symmetry of cluster's wave function; explanation
of convergence properties of SAPT; formulation and
implementation of SAPT applicable to many-electron dimers as
well as to pairwise nonadditive interactions;
development of SAPT based on density-functional theory which extended
the applicability of accurate electronic-structure methods
to interactions of molecules several times larger than
previously possible; formulation of dispersionless density
functional; calculations of some of the most reliable
intermolecular potentials to date; applications of these
potentials to predict cluster spectra, collision cross
sections, and bulk properties with accuracies comparable to
and sometimes exceeding those of experimental data;
explanation of several observations such as anomalous
rotational constants in helium nanodroplets or concerning
the structure of liquid water; one of the first predictions
of crystal structure of organic molecules from first
principles; generation of helium potentials used to create
new thermophysical standards; establishment of convergence
rates of many-body expansion in clusters and condensed
phases.

**Explicitly-correlated methods**:
formulation of first-quantized, explicitly correlated
coupled cluster theory and pioneering applications of
Gaussian-type geminals (GTG) using this method; discovery of
new functionals for GTG optimization; benchmark GTG
calculations for small systems including studies of
molecular properties, electron-molecule scattering, and
interatomic potentials.

**Exotic molecules**:
determination of the beta-electron spectrum of molecular tritium, needed for the
interpretation of neutrino mass experiments; studies of
properties of muonic molecules undergoing muon-catalyzed fusion;
demonstration that, contrary to earlier predictions, the
measured fusion yield is at the theoretical limit; determination
of density shifts and broadenings of transition lines of
antiprotonic helium by helium gas relevant for tests of
charge-parity-time invariance.