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@ARTICLE{Placke:860272,
      author       = {Placke, B. A. and Pluecker, T. and Splettstoesser, J. and
                      Wegewijs, M. R.},
      title        = {{A}ttractive and driven interactions in quantum dots:
                      {M}echanisms for geometric pumping},
      journal      = {Physical review / B},
      volume       = {98},
      number       = {8},
      issn         = {2469-9950},
      address      = {Woodbury, NY},
      publisher    = {Inst.},
      reportid     = {FZJ-2019-01047},
      pages        = {085307},
      year         = {2018},
      abstract     = {We analyze time-dependent transport through a quantum dot
                      with electron-electron interaction that is statically
                      tunable to both repulsive and attractive regimes, or even
                      dynamically driven. Motivated by the recent experimental
                      realization [A. Hamo et al., Nature (London) 535, 395
                      (2016)] of such a system in a static double quantum dot we
                      compute the geometric pumping of charge in the limit of weak
                      tunneling, high temperature, and slow driving. We analyze
                      the responses for all possible pumping experiments or
                      “driving protocols”, each defined by choosing a pair of
                      driving parameters (gate voltage, bias voltage, tunnel
                      coupling, electron-electron interaction). We show that such
                      responses for different experiments can be governed by a
                      common, underlying pumping mechanism, which is characterized
                      by a set of effective parameters. The latter are nontrivial
                      combinations of the experimentally driven parameters and
                      other static parameters. If two different pumping
                      experiments result in the same modulation of the effective
                      parameters, i.e., the underlying mechanism is the same, then
                      their responses will also be the same. Interestingly, for
                      static attractive interaction we find a nonzero pumping
                      response despite the attractive Coulomb blockade that
                      hinders stationary transport. Furthermore, we identify a
                      unique pumping response whose underlying mechanism relies on
                      the interaction to be one of the driving parameters: it
                      cannot be obtained with other sets of driving parameters.
                      Finally, although a single-dot model with orbital pseudospin
                      describes most of the physics of the mentioned experimental
                      setup, it is crucial to account for the additional
                      (real-)spin degeneracy of the double dot and the associated
                      electron-hole symmetry breaking. This is necessary because
                      the pumping response is more sensitive than dc transport
                      measurements and detects this difference through pronounced
                      qualitative effects.},
      cin          = {PGI-2 / JARA-FIT},
      ddc          = {530},
      cid          = {I:(DE-Juel1)PGI-2-20110106 / $I:(DE-82)080009_20140620$},
      pnm          = {141 - Controlling Electron Charge-Based Phenomena
                      (POF3-141)},
      pid          = {G:(DE-HGF)POF3-141},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000442667200006},
      doi          = {10.1103/PhysRevB.98.085307},
      url          = {https://juser.fz-juelich.de/record/860272},
}