Room 906E, 17 Lex., Phone: (646) 660-6205
Orland, Ph.D., University of California at Santa Cruz (Physics),
has a record of scholarly publications that covers three different
areas of particle physics, including statistical mechanics, quantum
field theory(gauge theory), and string theory. He has helped postdoctoral
fellowships at prestigious institutions; he spent two years at
Imperial College, London, and another at Niels Bohr Institute
in Copenhagen. Professor Orland has a fine record of teaching
introductory physics courses for both non-majors and majors in
the sciences. Dr. Orland is a faculty member of the
Ph.D. Program in Physics, CUNY Graduate Center.
Currently, my main interest is the long-range physics of Yang-Mills
theories, in particular QCD. I have been looking at the confinement
problem in two different ways:
- 2+1-dimensional lattice Yang-Mills theory in axial gauge. This theory
admits an unusual weak-coupling expansion, different from conventional
perturbation theory. The expansion is around 1+1-dimensional integrable
field theories, where the spectrum and mass gap are known. Unlike the
standard weak-coupling methods, confinement occurs very simply.
- I have also been looking for some time at the properties of
gauge-theory orbit space. This is the space of gauge connections modulo
gauge transformations - QCD configurations are not gauge fields, but
rather gauge orbits. I have been able to find the measure and Riemann
curvature on this space in 2+1 dimensions on a special set of coordinates.
I have been trying to find similar coordinates in 3+1 dimensions, where
new obstacles occur - in some sense the Gribov problem is more severe as
In addition to the above I have been looking at problems in general
relativity and cosmology and in integrable quantum field theories.