Chiral soliton lattice and charged pion condensation in strong magnetic fields
Journal article, Peer reviewed
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OriginalversjonBrauner, T., Yamamoto, N. (2017) Chiral soliton lattice and charged pion condensation in strong magnetic fields. Journal of High Energy Physics (JHEP). 2017(132) 10.1007/JHEP04(2017)132
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 also appears as a ground state of quantum chromodynamics at nonzero chemical potential in a magnetic field. By analyzing the fluctuations of the CSL, we furthermore demonstrate that in strong but achievable magnetic fields, charged pions undergo Bose-Einstein condensation. Our results, based on a systematic low-energy effective theory, are model-independent and fully analytic.