% IMPORTANT: The following is UTF-8 encoded.  This means that in the presence
% of non-ASCII characters, it will not work with BibTeX 0.99 or older.
% Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or
% “biber”.

@ARTICLE{Hosseinkhani:844737,
      author       = {Hosseinkhani, A. and Catelani, G.},
      title        = {{P}roximity effect in normal-metal quasiparticle traps},
      journal      = {Physical review / B},
      volume       = {97},
      number       = {5},
      issn         = {2469-9950},
      address      = {Woodbury, NY},
      publisher    = {Inst.},
      reportid     = {FZJ-2018-02117},
      pages        = {054513},
      year         = {2018},
      abstract     = {In many superconducting devices, including qubits,
                      quasiparticle excitations are detrimental. A normal metal
                      (N) in contact with a superconductor (S) can trap these
                      excitations; therefore, such a trap can potentially improve
                      the device's performances. The two materials influence each
                      other, a phenomenon known as proximity effect which has
                      drawn attention since the 1960's. Here, we study whether
                      this mutual influence places a limitation on the possible
                      performance improvement in superconducting qubits. We first
                      revisit the proximity effect in uniform NS bilayers; we show
                      that the density of states is of the Dynes type above the
                      minigap. We then extend our results to describe a nonuniform
                      system in the vicinity of a trap edge. Using these results
                      together with a phenomenological model for the suppression
                      of the quasiparticle density due to the trap, we find in a
                      transmon qubit an optimum trap-junction distance at which
                      the qubit relaxation rate is minimized. This optimum
                      distance, of the order of 4 to 20 coherence lengths,
                      originates from the competition between proximity effect and
                      quasiparticle density suppression. We conclude that the
                      harmful influence of the proximity effect can be avoided so
                      long as the trap is farther away from the junction than this
                      optimum.},
      cin          = {PGI-11 / PGI-2},
      ddc          = {530},
      cid          = {I:(DE-Juel1)PGI-11-20170113 / I:(DE-Juel1)PGI-2-20110106},
      pnm          = {144 - Controlling Collective States (POF3-144)},
      pid          = {G:(DE-HGF)POF3-144},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000425491500009},
      doi          = {10.1103/PhysRevB.97.054513},
      url          = {https://juser.fz-juelich.de/record/844737},
}