title: How to find conductance tensors of quantum multiwire junctions through static calculations: application to an interacting Y junction.
abstract: Conductance is related to dynamical correlation functions which can be calculated with time-dependent methods. Using boundary conformal field theory, we relate the conductance tensors of quantum junctions of multiple wires to static correlation functions in a finite system. We then propose a general method for determining the conductance through time-independent calculations alone. Applying the method to a Y junction of interacting quantum wires, we numerically verify the theoretical prediction for the conductance of the chiral fixed point of the Y junction and then calculate the thus far unknown conductance of its M fixed point with the time-independent density matrix renormalization group method.
authors.affiliation: Department of Physics, Boston University, Boston, Massachusetts 02215, USA.
authors.forename: Armin
authors.initials: A
authors.lastname: Rahmani
authors.forename: Chang-Yu
authors.initials: CY
authors.lastname: Hou
authors.forename: Adrian
authors.initials: A
authors.lastname: Feiguin
authors.forename: Claudio
authors.initials: C
authors.lastname: Chamon
authors.forename: Ian
authors.initials: I
authors.lastname: Affleck