Kallosh, Renata

Dates

Some Important Contribution(s):

SEE "SOME IMPORTANT PUBLICATIONS"

Some Important Publication(s):

Kallosh, R.E., "The Renormalization in Nonabelian Guage Theories,"Nuclear Physics, B78:293, 1974
This was one of the earliest papers on the so-called background field method which was used extensively in various calculations in guage theories, in gravity and supergravity. The structure of 2-loop divergence in pure gravity was also predicted in this paper.

[Soon after this paper appeared, its results were confirmed by M.T.Grisaru, P. van Nieuwehuizen, C.C.Wu in "Background Field Method versus Normal Field Theory in Explicit Examples: One Loop Divergences in S Matrix and Green's Function for Yang-Mills and Gravitational Fields" Physical Review D12:3203, 1975; A year later the same people used this method to verify "One Loop Renormalizability of Pure Supergravity and of Maxwell-Einstein Theory in Extended Supergravity", Physical Review Letters 37:1662, 1976. It was used by L.F. Abbot in "The Background Field Method Beyond One Loop"Nuclear Physics b185:189, 1981.]

{The prediction of the paper about 2-Loop divergence of pure gravity was confirmed by M.H. Goroff and A.Sagnotti in "The Ultraviolet Behavior of Einstein Gravity," Nuclear Physics B266:709, 1986, and by A.E.M. van de Ven, in "The Two-Loop Quantum Gravity," Nuclear Physics b378:309-366, 1992, using the same method.}

Kallosh, R.E., "Modified Feynman Rules in Supergravity," Nuclear Physics B , B141, no. 1-2(1978): 141-52.
It was discovered that in supergravity with open guage algebra the correct Feynman rules are different from the Feynman rules in non- Abelian guage theories. The Faddeev-Popov ghosts acquire a 4-ghost coupling and the third type of ghosts (which was later called the Nilsson-Kallosh ghost) is required in loop diagrams.

Kallosh, R.E., "Counterterms in Extended Supergravities," in Supergravity '81, eds. S. Ferrara and J.G. Taylor. Cambridge: Cambridge University Press, 1982. pp. 397-420.
Higher derivative supersymmetric invariants in supergravity were constructed. They were found to exist even in N=8 supergravity. This gave a strong indication that one can not expect to have finite theory above some loop level.

Kallosh, R.E., "Quantization of Green-Schwarz Superstring," Phys. Lett. B, vol. 195, no. 3(September 10, 1987): 369-75.
New phenomena in quantization of kappa-symmetric guage theories was discovered: the infinite dimensional reducibility related to nilpotent guage symmetry operators. Various possibilities to quantize such theories was suggested.

Kallosh, R.E., A. Linda, T. Ort, A. Peet, and A. Van Proyen, "Supersymmetry as a Cosmic Censor," Phys. Rev. D., 5278 (1992).
A First detailed study was performed of stringy supersymmetric BPS black holes with various fractions of supersymmetry unbroken. The arguments were suggested that the Bekenstein-Hawking entropy of such black holes is protected by supersymmetric non-renormalization theorem.

Ferrara, S., R.E. Kallosh, and A. Strominger, "N=2 Extremal Black Holes," Phys. Rev. D, 10(1995): 5412-5416; hep-th/9508072.
It was proved that the values of the moduli fields near supersymmetric black hole horizon do not depend on their values far away from the black hole and depend only on the integer values of the quantized charges. This explains the topological character of the entropy and the possibility for a quantum mechanical explanation of the entropy of supersymmetric black holes.

Kallosh, R.E., and B. Kol, "E(7), Symmetric Area of the Black Hole Horizon, Phys. Rev. D., vol. 10(1996): 5344-5348; hep-th/ 9602014.
It was shown that the entropy of the supersymmetric black holes in N=8 supergravity is given by a unique quartic invariant of the exceptional non-compact group E/sub 7(7)/.

Ferrara S., and R.E. Kallosh, "Supersymmetry and Attractors," Phys. Rev. D., vol. 2(1996): 1514; hep-th/9602136.
A universal formula for the entropy of extreme black holes is found. As for all black holes the Bekenstein-Hawking entropy is given by one quarter of the area of the horizon, S=A/4. For supersymmetric ones, the entropy formula is $S={A\over 4}=\pi M^2_{\rm min}$. Here $M^s_{\rm min}$ is the minimal value of the BPS black hole mass, extremized in the moduli space.

Kallosh, R.E., "Covariant Quantization of D-Branes," Phys. Rev. D., to appear in the September 1997 issues, hep-th/9705056.
A covariant quantization of kappa-symmetric D-brane actions is performed. As different from Green-Schwartz string, D-brane actions can be made invariant under irreducible kappa-symmetry which leads to simple quantization of such theories.

Honor(s)

Jobs/Positions

1981-89 Professor, Lebedev Physical Institute
1989-90 Scientific Associate, CERN, Switzerland
1990-present Professor, Physics Department, Stanford University

Education

B.S. Moscow State University 1966
Ph.D. Lebedev Physical Institute 1968

Sources

Renata Kallosh

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