123 research outputs found
Chiral soliton lattice in QCD-like theories
Recently, it has been shown that the ground state of quantum chromodynamics
(QCD) in sufficiently strong magnetic fields and at moderate baryon number
chemical potential carries a crystalline condensate of neutral pions: the
chiral soliton lattice (CSL). While the result was obtained in a
model-independent manner using effective field theory techniques, its
realization from first principles using lattice Monte Carlo simulation is
hampered by the infamous sign problem. Here we show that CSL, or a similar
inhomogeneous phase, also appears in the phase diagram of a class of
vector-like gauge theories that do not suffer from the sign problem even in the
presence of a baryon chemical potential and external magnetic field. We also
show that the onset of nonuniform order manifests itself already in the
adjacent homogeneous Bose-Einstein-condensation phase through a characteristic
roton-like minimum in the dispersion relation of the lowest-lying quasiparticle
mode. Last but not least, our work gives a class of explicit counterexamples to
the long-standing conjecture that positivity of the determinant of the Dirac
operator (that is, absence of the sign problem) in a vector-like gauge theory
precludes spontaneous breaking of translational invariance, and thus implies
the absence of inhomogeneous phases in the phase diagram of the theory.Comment: 1+26 pages; v2 matches published versio
Louise M. Haywood, ed., Cultural Contexts/Female Voices. Papers of the Medieval Hispanic Research Seminar, 27. Department of Hispanic Studies, Queen Mary and Westfield College, 2000
Mary F. Thurlkill, Chosen among Women: Mary and Fatima in Medieval Christianity and Shi\u27ite Islam. University of Notre Dame Press, 2007
Barbara F. Weissberger, Isabel Rules: Constructing Queenship, Wielding Power. University of Minnesota Press, 2004
Mary F. Thurlkill, Chosen among Women: Mary and Fatima in Medieval Christianity and Shi\u27ite Islam. University of Notre Dame Press, 2007
Barbara F. Weissberger, Isabel Rules: Constructing Queenship, Wielding Power. University of Minnesota Press, 2004
Louise M. Haywood, ed., Cultural Contexts/Female Voices. Papers of the Medieval Hispanic Research Seminar, 27. Department of Hispanic Studies, Queen Mary and Westfield College, 2000
Four schools of European accounting thought
A feature of the history of accounting thought is the existence of contending theories of accounts in continental Europe. Four schools of accounting thought developed and are here briefly examined
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