Junctions of multiple quantum wires with different Luttinger parameters

Chang-Yu Hou,1,2 Armin Rahmani,3 Adrian E. Feiguin,4 and Claudio Chamon5 1Department of Physics and Astronomy, University of California at Riverside, Riverside, California 92521, USA 2Department of Physics, California Institute of Technology, Pasadena, California 91125, USA 3Theoretical Division, T-4 and Center for Nonlinear Studies, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA 4Department of Physics and Astronomy, University of Wyoming, Laramie, Wyoming 82071, USA 5Physics Department, Boston University, Boston, Massachusetts 02215, USA (Received 9 May 2012; revised manuscript received 2 August 2012; published 22 August 2012)