Wang, D.-W.Mishchenko, E. G.Demler, Eugene2016-08-242005Wang, D.-W., E. G. Mishchenko, and E. Demler. 2005. “Pseudospin Ferromagnetism in Double-Quantum-Wire Systems.” Physical Review Letters 95 (8) (August 19). doi:10.1103/physrevlett.95.086802.0031-9007http://nrs.harvard.edu/urn-3:HUL.InstRepos:27899414We propose that a pseudospin ferromagnetic (i.e., interwire coherent) state can exist in a system of two parallel wires of finite width in the presence of a perpendicular magnetic field. This novel quantum manybody state appears when the interwire distance decreases below a certain critical value which depends on the magnetic field. We determine the phase boundary of the ferromagnetic phase by analyzing the softening of the spin-mode velocity using the bosonization approach. We also discuss the signatures of this state in tunneling and Coulomb drag experiments.en-USJournal Article2016-08-2410.1103/physrevlett.95.086802