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Many-body wavefunctions for quantum impurities out of equilibrium
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Culver, Adrian. Many-body wavefunctions for quantum impurities out of equilibrium. Retrieved from https://doi.org/doi:10.7282/t3-574w-gn97

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TitleMany-body wavefunctions for quantum impurities out of equilibrium
NameCulver, Adrian (author); Andrei, Natan (chair); Coleman, Piers (internal member); Diaconescu, Duiliu (internal member); Podzorov, Vitaly (internal member); Jerez, Andres (outside member); Rutgers University; School of Graduate Studies
Date Created2020
Other Date2020-10 (degree)
SubjectPhysics and Astronomy
Extent1 online resource (xi, 319 pages)
DescriptionWe present a new method for calculating the time-dependent many-body wavefunction that follows a local quench. We use the method to find the exact wavefunction of several quantum impurity models, focusing mainly on the nonequilibrium Kondo model driven by a bias voltage. The Bethe ansatz is not used, and integrability does not appear to play any role. We show that the long time limit (with the system size taken to infinity first) of the time-evolving wavefunction is a current-carrying nonequilibrium steady state, which we can also find directly with our method. We evaluate the steady state current in the regimes of strong and weak coupling, finding a new universal regime of emph{strong ferromagnetic} coupling with Kondo temperature $T_K = D e^{-frac{3pi^2}{8}
ho |J|} (J<0, ho|J|oinfty). In this regime, the differential conductance dI/dV reaches the unitarity limit 2e^2/h asymptotically at emph{large} voltage or temperature.
NotePh.D.
NoteIncludes bibliographical references
Genretheses, ETD doctoral
Persistent URLhttps://doi.org/doi:10.7282/t3-574w-gn97
LanguageEnglish
CollectionSchool of Graduate Studies Electronic Theses and Dissertations
Organization NameRutgers, The State University of New Jersey
RightsThe author owns the copyright to this work.
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