Rényi entropy and negativity for massless Dirac fermions at conformal interfaces and junctions
نویسندگان
چکیده
A bstract We investigate the ground state of a (1+1)-dimensional conformal field theory (CFT) built with M species massless free Dirac fermions coupled at one boundary point via junction/interface. Each CFT represents wire finite length L . develop systematic strategy to compute Rényi entropies for generic bipartition between wires and entanglement negativity two non-complementary sets wires. Both these measures turn out grow logarithmically an exactly calculated universal prefactor depending on details junction bipartition. These analytic predictions are tested numerically junctions Fermi gases, finding perfect agreement.
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ژورنال
عنوان ژورنال: Journal of High Energy Physics
سال: 2022
ISSN: ['1127-2236', '1126-6708', '1029-8479']
DOI: https://doi.org/10.1007/jhep08(2022)171