Fernando G S L Brandão 2005 New J. Phys. 7 254 doi:10.1088/1367-2630/7/1/254
Fernando G S L Brandão
Show affiliationsWe show that the quantum order parameters (QOPs) associated with the transitions between a normal conductor and a superconductor in the BCS and η-pairing models and between a Mott-insulator and a superfluid in theBose–Hubbard model are directly related to the amount of entanglement existent in the ground state of each system. This connection gives a physical meaningful interpretation to these QOP, which shows the intrinsically quantum nature of the phase transitions considered.
03.67.Mn Entanglement measures, witnesses, and other characterizations
Issue 1 (December 2005)
Received 13 October 2005
Published 16 December 2005
Fernando G S L Brandão 2005 New J. Phys. 7 254
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