Martin Halpern (E)

Martin Halpern (E)

Professor Emeritus

Research Area(s): Particle Physics


Born: August 26, 1939, Newark, NJ. Education: B.S. in Mathematics, University of Arizona 1960; M.A. in Physics, Harvard University 1961; Ph.D. in Physics, Harvard University, 1964. Brief Professional History: NATO Fellow, CERN, Geneva, Switzerland, 1964-65; Assistant Research Physicist, University of California, 1965-66; Postdoctoral Fellow, Institute for Advanced Study, 1966-67; Assistant Professor, University of California, 1967-70; Associate Professor, University of California, 1970-74; Professor, University of California, 1974-present. Professional Society Affiliations: Phi Beta Kappa, Phi Kappa Phi. Awards and Honors: Westinghouse Science Talent Search Winner, 1956: University Valedictorian, 1960: Harvard Fellowship, 1960-61: National Science Foundation Predoctoral Fellow, 1961-64: NATO Fellow (Postdoctoral), 1964-65. Visiting Scientist at the Niels Bohr Institute, Copenhagen, Spring, 1982. Visiting Scientist at the Institute for Advanced Study, Princeton, Spring 1988. Visiting Scientist at RIMS Workshop on Infinite Analysis, Kyoto, Summer, 1991. Visiting Scientist at CERN, Geneva, 1995-96. Miller Professor, UCBerkeley, Spring 1999.

Research Interests

Quantum field theory, String theory, Conformal field theory, Affine Lie algebra, Matrix theory, orbifold theory, and the large N limit.

Current Projects
For the past few years, we have been constructing the theory of the general current-algebraic orbifold, which had previously been studied only at the level of examples. The general construction also allows us to see more deeply into orbifold theory, and we are presently working out new twisted KZ equations for various classes of orbifolds. Extensions of this program including open WZW strings and twisted open WZW strings are also being studied in our group.


J. de Boer, J. Evslin, M. B. Halpern, and J. E. Wang, “New duality transformations in orbifold theory,” Int. J. Mod. Phys A15, 1297 (2000).

M. B. Halpern and J. E. Wang, “More about all current-algebraic orbifolds,” Int. J. Mod. Phys A16, 97 (2001).

S. Giusto and M. B. Halpern, “Hamiltonian formulation of open WZW strings,” hep-th/0101220.

J. de Boer, M. B. Halpern, and N. A. Obers, “The operator algebra and twisted KZ equations of WZW orbifolds,” hep-th/0105305.