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- W1557553732 abstract "In this paper, we show that the Hamiltonian approach to loop quantum gravity has a fermion doubling problem. To obtain this result, we couple loop quantum gravity to a free massless scalar and a chiral fermion field, gauge fixing the many fingered time gauge invariance by interpreting the scalar field as a physical clock. We expand around a quantum gravity state based on a regular lattice and consider the limit where the bare cosmological constant is large but the fermonic excitations have energies low in Planck units. We then make the case for identifying the energy spectrum in this approximation with that of a model of lattice fermion theory which is known to double." @default.
- W1557553732 created "2016-06-24" @default.
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- W1557553732 date "2015-07-05" @default.
- W1557553732 modified "2023-10-16" @default.
- W1557553732 title "Fermion Doubling in Loop Quantum Gravity" @default.
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