We introduce a systematic framework to calculate the bipartite entanglement entropy of a spatial subsystem in a one-dimensional quantum gas which can be mapped into a noninteracting fermion system. To show the wide range of applicability of the proposed formalism, we use it for the calculation of the entanglement in the eigenstates of periodic systems, in a gas confined by boundaries or external potentials, in junctions of quantum wires, and in a time-dependent parabolic potential.
Entanglement Entropy of One-Dimensional Gases / Calabrese, Pasquale; Mintchev, M; Vicari, E.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 107:2(2011), pp. 1-4. [10.1103/PhysRevLett.107.020601]
Entanglement Entropy of One-Dimensional Gases
Calabrese, Pasquale;
2011-01-01
Abstract
We introduce a systematic framework to calculate the bipartite entanglement entropy of a spatial subsystem in a one-dimensional quantum gas which can be mapped into a noninteracting fermion system. To show the wide range of applicability of the proposed formalism, we use it for the calculation of the entanglement in the eigenstates of periodic systems, in a gas confined by boundaries or external potentials, in junctions of quantum wires, and in a time-dependent parabolic potential.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
