Quantum Information and Many-Body Quantum Systems
timetable:
Mon 26 Mar, 11:20 - 11:50, Aula Dini
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seminar: Divergence of the entanglement range in low dimensional quantum systems
speaker: Paola Verrucchi (ISC - CNR Firenze)abstract: We study the pairwise entanglement close to separable ground states of a class of one dimensional quantum spin models. At T=0 we find that such ground states separate regions, in the space of the Hamiltonian parameters, which are characterized by qualitatively different types of entanglement, namely parallel and antiparallel entanglement; we further demonstrate that the range of the Concurrence diverges while approaching separable ground states, therefore evidencing that such states, with uncorrelated fluctuations, are reached by a long range reshuffling of the entanglement. We generalize our results to the analysis of quantum phase transitions occurring in bosonic and fermionic systems.
timetable:
Mon 26 Mar, 11:20 - 11:50, Aula Dini
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