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Nature of state entanglement in continuous phase transitions

Grant number: 05/00155-8
Support type:Scholarships in Brazil - Doctorate
Effective date (Start): November 01, 2005
Effective date (End): August 31, 2008
Field of knowledge:Physical Sciences and Mathematics - Physics
Principal Investigator:Marcos Cesar de Oliveira
Grantee:Thiago Rodrigues de Oliveira
Home Institution: Instituto de Física Gleb Wataghin (IFGW). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil


Recent effort has been devoted to the understanding of the connections between quantum information and the theory of quantum critical phenomena. A key novel observation is that quantumentanglement can play an important role in a quantum phase transition. In this project we want to investigate the role of state entanglement, as a typical quantum correlation, in processes of phase transition of many particles systems. Two main goals are outlined for this project: (I) The search for a good measure of multipartite entanglement with a relevant physical meaning, andcapable to represent the critical behaviour around the quantum phase transition; (II) the investigation of the coexistence of correlations of exclusively quantum nature (entanglement) withcorrelations of classical nature and their behaviour around the critical regime of continuous phase transitions.

Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
DE OLIVEIRA‚ T.R.; RIGOLIN‚ G.; DE OLIVEIRA‚ M.C.; MIRANDA‚ E. Symmetry-breaking effects upon bipartite and multipartite entanglement in the XY model. Physical Review A, v. 77, n. 3, p. 032325, 2008.
Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
OLIVEIRA, Thiago Rodrigues de. Entanglement and matrix product states in quantum phase transitions. 2008. Doctoral Thesis - Universidade Estadual de Campinas (UNICAMP). Instituto de Física Gleb Wataghin.

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