Qubit entanglement in multimagnon states

Details Qubit entanglement in multimagnon states Qubit entanglement in multimagnon states

2005-05-17

arxiv.org/abs/quant-ph/0505124v1

Physics

Quantum Physics

10 pages, 7 figures

Scientific paper

10.1103/PhysRevB.73.184413

The qubit entanglement induced by quasiparticle excitations in the Heisenberg spin chain and its relationship to the Bethe Ansatz structure of the eigenmodes is studied. A phenomenon called entanglement quenching, which suppresses eigenstate entanglement, is described and shown to be mediated by Goldstone magnons. Scattering states are characterized by short-range entanglement, and never exhibit entanglement at the longest range. In contrast, bound states have complex long-range entanglement structures.

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