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@ARTICLE{Nghiem:838376,
      author       = {Nghiem, Hoa and Costi, Theodoulos},
      title        = {{T}ime {E}volution of the {K}ondo {R}esonance in {R}esponse
                      to a {Q}uench},
      journal      = {Physical review letters},
      volume       = {119},
      number       = {15},
      issn         = {1079-7114},
      address      = {College Park, Md.},
      publisher    = {APS},
      reportid     = {FZJ-2017-06988},
      pages        = {156601},
      year         = {2017},
      abstract     = {We investigate the time evolution of the Kondo resonance in
                      response to a quench by applying the time-dependent
                      numerical renormalization group (TDNRG) approach to the
                      Anderson impurity model in the strong correlation limit. For
                      this purpose, we derive within the TDNRG approach a
                      numerically tractable expression for the retarded two-time
                      nonequilibrium Green function G(t+t′,t), and its
                      associated time-dependent spectral function, A(ω,t), for
                      times t both before and after the quench. Quenches from both
                      mixed valence and Kondo correlated initial states to Kondo
                      correlated final states are considered. For both cases, we
                      find that the Kondo resonance in the zero temperature
                      spectral function, a preformed version of which is evident
                      at very short times t→0+, only fully develops at very long
                      times t≳1/TK, where TK is the Kondo temperature of the
                      final state. In contrast, the final state satellite peaks
                      develop on a fast time scale 1/Γ during the time interval
                      −1/Γ≲t≲+1/Γ, where Γ is the hybridization strength.
                      Initial and final state spectral functions are recovered in
                      the limits t→−∞ and t→+∞, respectively. Our
                      formulation of two-time nonequilibrium Green functions
                      within the TDNRG approach provides a first step towards
                      using this method as an impurity solver within
                      nonequilibrium dynamical mean field theory.},
      cin          = {IAS-3 / PGI-2 / JARA-HPC},
      ddc          = {550},
      cid          = {I:(DE-Juel1)IAS-3-20090406 / I:(DE-Juel1)PGI-2-20110106 /
                      $I:(DE-82)080012_20140620$},
      pnm          = {142 - Controlling Spin-Based Phenomena (POF3-142) /
                      Thermoelectric properties of molecular quantum dots and
                      time-dependent response of quantum dots $(jiff23_20140501)$
                      / Density functional calculations with molecular dynamics --
                      amorphous and crystalline materials $(jiff05_20170501)$},
      pid          = {G:(DE-HGF)POF3-142 / $G:(DE-Juel1)jiff23_20140501$ /
                      $G:(DE-Juel1)jiff05_20170501$},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:29077442},
      UT           = {WOS:000412979000014},
      doi          = {10.1103/PhysRevLett.119.156601},
      url          = {https://juser.fz-juelich.de/record/838376},
}