Unbroken supersymmetry requires degeneracy between Bose and Fermi degrees of f reedom [1]. Since no such degeneracy is actually observed, any supersymmetr ic model of nature must include a mechanismâ€¦ (More)

A brief review is given of a new method for studying the critical behavior of quantum impurity problems, based on conformal field theory techniques, which I developed with Andreas Ludwig. Someâ€¦ (More)

Boundary critical phenomena are studied in the 3State Potts model in 2 dimensions using conformal field theory, duality and renormalization group methods. A presumably complete set of boundaryâ€¦ (More)

We study the critical two-dimensional Ising model with a defect line (altered bond strength along a line) in the continuum limit. By folding the system at the defect line, the problem is mapped to aâ€¦ (More)

A fundamental prediction of scaling theories of the Kondo effect is the screening of an impurity spin by a cloud of electrons spread out over a mesoscopic distance. This cloud has never been observedâ€¦ (More)

When communication lines in an interconnection network are prone to random transmission failures, the time required to broadcast a message throughout the network from a given source vertex isâ€¦ (More)

We present exact diagonalization and density matrix renormalization group results for the entanglement entropy of critical spin-1/2 XXZ chains. We find that open boundary conditions induce anâ€¦ (More)

We present exact results on the nonequilibrium current fluctuations for 2 quantum dots in series throughout a crossover from non-Fermi liquid to Fermi liquid behavior described by the 2 impurityâ€¦ (More)

While violations of the Fermi liquid paradigm for metals are of great interest in various physical systems, quantum impurity models are among the few cases where exact theoretical results areâ€¦ (More)