Driving a first order quantum phase transition by coupling a quantum dot to a 1D charge density wave

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dc.creatorWeiss, Y.
dc.creatorGoldstein, M.
dc.creatorBerkovits, R.
dc.date2006-10-19
dc.date2007-02-18
dc.date.accessioned2026-07-07T07:47:13Z
dc.date.available2026-07-07T07:47:13Z
dc.descriptionThe ground state properties of a one-dimensional system with particle-hole symmetry, consisting of a gate controlled dot coupled to an interacting reservoir, are explored using the numerical DMRG method. It was previously shown that the system's thermodynamic properties as a function of the gate voltage in the Luttinger liquid phase are qualitatively similar to the behavior of a non-interacting wire with an effective (renormalized) dot-lead coupling. Here we examine the thermodynamic properties of the wire in the charge density wave phase, and show that these properties behave quite differently. The number of electrons in the system remains constant as a function of the gate voltage, while the total energy becomes linear. Moreover, by tuning the gate voltage on the dot in the charge density wave phase it is possible to drive the wire through a first order quantum phase transition in which the population of each site in the wire is inverted.
dc.description7 pages, 7 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0610543
dc.identifierhttp://arxiv.org/abs/cond-mat/0610543
dc.identifierJ. Phys.: Condens. Matter 19, 086215 (2007)
dc.identifierdoi:10.1088/0953-8984/19/8/086215
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/124089
dc.subjectStrongly Correlated Electrons
dc.subjectMesoscale and Nanoscale Physics
dc.titleDriving a first order quantum phase transition by coupling a quantum dot to a 1D charge density wave
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