Entanglement in quantum spin chains

Abstract

Entanglement plays a central role in quantum information processing and its usefulness as a resource for quantum information processing in quantum spin chain models has been vastly studied. In this thesis, as an extension of previous studies, quantitative feature of entanglement in Heisenberg XXX and XX model with next-nearest-neighbor interaction is studied in full detail. Moreover, it is shown that spin chains can act as a good resource for quantum teleportation and a quantum teleportation scheme along a Heisenberg XX open chain is proposed.