• Anomalous electrodynamics of neutral pion matter in strong magnetic fields 

      Brauner, Tomas; Kadam, Saurabh (Journal article; Peer reviewed, 2017-03)
      The ground state of quantum chromodynamics in sufficiently strong external magnetic fields and at moderate baryon chemical potential is a chiral soliton lattice (CSL) of neutral pions [1]. We investigate the interplay ...
    • Anomalous low-temperature thermodynamics of QCD in strong magnetic fields 

      Brauner, Tomas; Kadam, Saurabh (Journal article; Peer reviewed, 2017-11)
      The thermodynamics of quantum chromodynamics at low temperatures and in sufficiently strong magnetic fields is governed by neutral pions. We analyze the interacting system of neutral pions and photons at zero baryon chemical ...
    • Chiral soliton lattice and charged pion condensation in strong magnetic fields 

      Brauner, Tomas; Yamamoto, Naoki (Journal article; Peer reviewed, 2017-04)
      The Chiral Soliton Lattice (CSL) is a state with a periodic array of topological solitons that spontaneously breaks parity and translational symmetries. Such a state is known to appear in chiral magnets. We show that CSL ...
    • Chiral soliton lattice phase in warm QCD 

      Brauner, Tomas; Kolesova, Helena; Yamamoto, Naoki (Peer reviewed; Journal article, 2021-11)
      We analyze the phase diagram of quantum chromodynamics at low-to-moderate temperature, baryon chemical potential and external magnetic field within chiral perturbation theory at next-to-leading order of the derivative ...
    • Chiral symmetry breaking in effective models of QCD 

      Oramah, Chinedu Kevin (Masteroppgave/UIS-HF-IMF/2019;, Master thesis, 2019-06-15)
    • Competition of chiral soliton lattice and Abrikosov vortex lattice in QCD with isospin chemical potential 

      Grønli, Martin Spillum; Brauner, Tomas (Peer reviewed; Journal article, 2022-04)
      We investigate the thermodynamics of two-flavor quark matter in presence of nonzero isospin chemical potential and external magnetic field. It is known that at sufficiently high isospin chemical potential, charged pions ...
    • Dimensional reduction of the Standard Model coupled to a new singlet scalar field 

      Brauner, Tomas; Tenkanen, Tuomas; Tranberg, Anders; Vuorinen, Aleksi; Weir, David James (Journal article; Peer reviewed, 2017)
      We derive an effective dimensionally reduced theory for the Standard Model augmented by a real singlet scalar. We treat the singlet as a superheavy field and integrate it out, leaving an effective theory involving only the ...
    • On-shell recursion relations for nonrelativistic effective field theories 

      Mojahed, Martin Aria; Brauner, Tomas (Peer reviewed; Journal article, 2021-10)
      We derive on-shell recursion relations for nonrelativistic effective field theories (EFTs) with enhanced soft limits. The recursion relations are illustrated through analytic calculation of tree-level scattering amplitudes ...
    • Scattering amplitudes of massive Nambu-Goldstone bosons 

      Brauner, Tomas; Jakobsen, Martin Fonnum (Journal article; Peer reviewed, 2018-01)
      Massive Nambu-Goldstone (mNG) bosons are quasiparticles the gap of which is determined exactly by symmetry. They appear whenever a symmetry is broken spontaneously in the ground state of a quantum many-body system and at ...