De Broglie and Bohm formulated a causal quantum mechanics with a phase space density whose integral over momentum reproduces the position probability density of usual statistical quantum theory. We propose a causal quantum theory with a joint probability distribution such that the separate probability distributions for position and momentum agree with usual quantum theory. Unlike the Wigner dis...

a. Department of Microbiology and Cell Biology & Centre for Infectious Disease and Research, Indian Institute of Science, Bangalore 5600012, Karnataka, India. E-mail: [email protected] b. Department of Chemistry, Indian Institute of Science Education and Research Pune, Dr. Homi Bhabha Road, Pashan Pune 411 008, Maharashtra, India. E-mail: [email protected] c. Institute of Bioinfo...

S-duality of hetertotic / type II string theory compactified on a six dimensional torus requires the existence of Kaluza-Klein dyons, carrying winding charge. We identify the zero modes of the Kaluza-Klein monopole solution which are responsible for these dyonic excitations, and show that we get the correct degeneracy of dyons as predicted by Sduality. The self-dual harmonic two form on the Euc...

Recently Banks, Douglas and Seiberg have shown that the world volume theory of a three brane of the type IIB theory in the presence of a configuration of four Dirichlet seven branes and an orientifold plane is described by an N=2 supersymmetric SU(2) gauge theory with four quark flavours in 3+1 dimensions. In this note we show how the BPS mass formula for N=2 supersymmetric gauge theory arises ...

Spectrum of elementary string states in type II string theory contains ultra-short multiplets that are marginally stable. U -duality transformation converts these states into bound states at threshold of p-branes carrying Ramond-Ramond charges, and wrapped around p-cycles of a torus. We propose a test for the existence of these marginally stable bound states. Using the recent results of Polchin...

Spectrum of elementary string states in type II string theory compactified on a torus contains short multiplets which are invariant under only one quarter of the space-time supersymmetry generators. U -duality transformation converts these states into bound states of Dirichlet branes which wrap around intersecting cycles of the internal torus. We study a class of these bound states that are dua...

1 Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai 400 005, India 2 Centre for Theoretical Studies, Indian Institute of Science, Bangalore 560 012, India 3 Mehta Research Institute, Chhatnag Road, Jhusi, Allahabad 221 506, India 4 Rutherford Appleton Lab., Chilton, Didcot, Oxfordshire, OXl 1 0QX, England 5 The Institute of Mathematical Sciences, C.I.T. Campus, Taramani, Chennai ...

We argue that all conjectured dualities involving various string, Mand F theory compactifications can be ‘derived’ from the conjectured duality between type I and SO(32) heterotic string theory, T-dualities, and the definition of Mand F theories. (Based on a talk given at the conference on ‘Advanced Quantum Field Theory’, Le Londe-les-Maures, France, Aug.31-Sept.5, 1996, in memory of Claude Itz...

Goutam Sheet,1 H. Rosner,2 S. Wirth,2 A. Leithe-Jasper,2 W. Schnelle,2 U. Burkhardt,2 J. A. Mydosh,2,3 P. Raychaudhuri,1 and Yu. Grin2 1Department of Condensed Matter Physics and Materials Science, Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai 400005, India 2Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Straße 40, 01187 Dresden, Germany 3Kamerlingh O...