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Quantum and classical correlations in solid state systems
This research is led by profs. Marcelo Sarandy, Thiago R. Oliveira and Mohammad Rajabpour.
Quantum correlations and applications in many-body systems
The aim of this research area is the investigation of entanglement,
nonlocality, and other quantum correlations (such as quantum discord)
in multi-particle quantum systems. Topics of interest include quantum
phase transitions in condensed matter systems, characterization of
quantum protocols through the collective correlation behavior,
thermalization of pure quantum states, and quantum thermodynamics.
Recent publications:
(1) F. M. Paula, P. C. Obando, M. S. Sarandy, “Non-Markovianity
through multipartite correlation measures”, Phys. Rev. A 93, 042337
(2016).
(2) H. C. Braga, C. C. Rulli, T. R. de Oliveira, M. S. Sarandy,
“Maxwell's demons in multipartite quantum correlated systems”, Phys.
Rev. A 90, 042338 (2014).
(3) F. M. Paula, I. A. Silva, J. D. Montealegre, A. M. Souza, E. R.
deAzevedo, R. S. Sarthour, A. Saguia, I. S. Oliveira, D. O.
Soares-Pinto, G. Adesso, M. S. Sarandy, “Observation of
environment-induced double sudden transitions in geometric quantum
correlations”, Phys. Rev. Lett. 111, 250401 (2013).
(4) T. R. de Oliveira, A. Saguia, M. S. Sarandy, “Nonviolation of
Bell's Inequality in Translation Invariant Systems”, EPL 100, 60004
(2012).
Quantifying correlations in quantum information theory
- Multipartite entanglement and monogamy relations
Recent paper:
Monogamy inequality and residual entanglement of three qubits under decoherence. de Oliveira; Phys. Rev. A 80, 022331 (2009).
Correlations in quantum critical systems
- Bipartite and multipartite entanglement and correlations in quantum phase transitions
Recent papers:
Entanglement dynamics via geometric phases in quantum spin chains. Castro, Sarandy, Phys. Rev. A 83, 042334 (2011).
Quantum and classical thermal correlations in the XY spin-1/2 chain. Maziero et al.; Phys. Rev. A 82, 012106 (2010).
Nonadditive entropy for random quantum spin-S chains. Saguia,Sarandy; Phys. Lett. A 374, 3384 (2010).
Entanglement and local extremes at an infinite-order quantum phase transition. Rulli, Sarandy; Phys. Rev. A 81, 032334 (2010).
Classical correlation and quantum discord in critical systems. Sarandy; Phys. Rev. A 80, 022108 (2009).
Many-particle approximation schemes
- Matrix Product States and other ansatz with little entanglement.
The role of entanglement in the thermalization process
Recent papers:
Typicality in random matrix product states. Garnerone, de Oliveira, Zanardi; Phys. Rev. A 81, 032336 (2010).
Statistical properties of random matrix product states. Garnerone, de Oliveira, Zanardi, Haas; Phys. Rev. A 82, 052312 (2010).
