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@ARTICLE{Batini:596542,
      author       = {Batini, Laura and Chatrchyan, Aleksandr and Berges,
                      Jürgen},
      title        = {{R}eal-time dynamics of false vacuum decay},
      reportid     = {PUBDB-2023-06184, DESY-23-158. arXiv:2310.04206},
      year         = {2023},
      abstract     = {We investigate false vacuum decay of a relativistic scalar
                      field initialized in the metastable minimum of an asymmetric
                      double-well potential. The transition to the true ground
                      state is a well-defined initial-value problem in real time,
                      which can be formulated in nonequilibrium quantum field
                      theory on a closed time path. We employ the non-perturbative
                      framework of the two-particle irreducible (2PI) quantum
                      effective action at next-to-leading order in a large-N
                      expansion. We also compare to classical-statistical field
                      theory simulations on a lattice in the high-temperature
                      regime. By this, we demonstrate that the real-time decay
                      rates are comparable to those obtained from the conventional
                      Euclidean (bounce) approach. In general, we find that the
                      decay rates are time dependent. For a more comprehensive
                      description of the dynamics, we extract a time-dependent
                      effective potential, which becomes convex during the
                      nonequilibrium transition process. By solving the quantum
                      evolution equations for the one- and two-point correlation
                      functions for vacuum initial conditions, we demonstrate that
                      quantum corrections can lead to transitions that are not
                      captured by classical-statistical approximations.},
      keywords     = {false vacuum: decay (INSPIRE) / higher-order: 1 (INSPIRE) /
                      field theory: scalar (INSPIRE) / two-point function
                      (INSPIRE) / ground state (INSPIRE) / expansion 1/N (INSPIRE)
                      / effective action (INSPIRE) / asymmetry (INSPIRE) /
                      nonperturbative (INSPIRE) / two-particle (INSPIRE) /
                      boundary condition (INSPIRE)},
      cin          = {T},
      cid          = {I:(DE-H253)T-20120731},
      pnm          = {611 - Fundamental Particles and Forces (POF4-611) / DFG
                      project 390833306 - EXC 2121: Quantum Universe (390833306)},
      pid          = {G:(DE-HGF)POF4-611 / G:(GEPRIS)390833306},
      experiment   = {EXP:(DE-MLZ)NOSPEC-20140101},
      typ          = {PUB:(DE-HGF)25},
      eprint       = {2310.04206},
      howpublished = {arXiv:2310.04206},
      archivePrefix = {arXiv},
      SLACcitation = {$\%\%CITATION$ = $arXiv:2310.04206;\%\%$},
      doi          = {10.3204/PUBDB-2023-06184},
      url          = {https://bib-pubdb1.desy.de/record/596542},
}