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@ARTICLE{Espinosa:419168,
      author       = {Espinosa, J. R. and Konstandin, T.},
      title        = {{A} fresh look at the calculation of tunneling actions in
                      multi-field potentials},
      journal      = {Journal of cosmology and astroparticle physics},
      volume       = {1901},
      number       = {01},
      issn         = {1475-7516},
      address      = {London},
      publisher    = {IOP},
      reportid     = {PUBDB-2019-00951, arXiv:1811.09185. DESY-18-206.
                      CERN-TH-2018-245},
      pages        = {051},
      year         = {2019},
      note         = {(c) IOP Publishing Ltd and Sissa Medialab},
      abstract     = {The quantum decay of a metastable vacuum is exponentially
                      suppressed by a tunneling action that can be calculated in
                      the semi-classical approximation as the Euclidean action of
                      a bounce that interpolates between the false and true
                      phases. For multi-field potentials, finding the bounce is
                      non-trivial due to its peculiar boundary conditions and the
                      fact that the action at the bounce is not a minimum but
                      merely a saddle point. Recently, an alternative tunneling
                      action has been proposed that does not rely on Euclidean
                      bounces and reproduces the standard result at its minimum.
                      Here we generalize this new approach for several scalar
                      fields and demonstrate how its use can significantly improve
                      the numerical calculation of tunneling actions for
                      multi-field potentials.},
      cin          = {T},
      ddc          = {530},
      cid          = {I:(DE-H253)T-20120731},
      pnm          = {611 - Fundamental Particles and Forces (POF3-611)},
      pid          = {G:(DE-HGF)POF3-611},
      experiment   = {EXP:(DE-MLZ)NOSPEC-20140101},
      typ          = {PUB:(DE-HGF)29 / PUB:(DE-HGF)16},
      eprint       = {1811.09185},
      howpublished = {arXiv:1811.09185},
      archivePrefix = {arXiv},
      SLACcitation = {$\%\%CITATION$ = $arXiv:1811.09185;\%\%$},
      UT           = {WOS:000457103000001},
      doi          = {10.1088/1475-7516/2019/01/051},
      url          = {https://bib-pubdb1.desy.de/record/419168},
}