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quant-ph2015★ 51 cited
Entanglement in fermionic chains with finite range coupling and broken symmetries
F. Ares, J. G. Esteve, F. Falceto +1
We obtain a formula for the determinant of a block Toeplitz matrix associated with a quadratic fermionic chain with complex coupling. Such couplings break reflection symmetry and/o…
quant-ph2014★ 23 cited
Entanglement of several blocks in fermionic chains
F. Ares, J. G. Esteve, F. Falceto
In this paper we propose an expression for the entanglement entropy of several intervals in a stationary state of a free, translational invariant Hamiltonian in a fermionic chain.…