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Non-Markovianity in quantum networks

Grant number: 14/20941-7
Support type:Scholarships abroad - Research Internship - Post-doctor
Effective date (Start): January 30, 2015
Effective date (End): January 29, 2016
Field of knowledge:Physical Sciences and Mathematics - Physics - General Physics
Principal Investigator:Felipe Fernandes Fanchini
Grantee:Goktug Karpat
Supervisor abroad: Sabrina Maniscalco
Home Institution: Faculdade de Ciências (FC). Universidade Estadual Paulista (UNESP). Campus de Bauru. Bauru , SP, Brazil
Local de pesquisa : University of Turku, Finland  
Associated to the scholarship:12/18558-5 - Studying the monogamic relations between entanglement and quantum correlations, BP.PD


While the investigation of classical complex networks has proved to be fundamental to countless areas of both natural and social sciences ranging from sociology to physics, the study of their quantum mechanical counterpart has only started to emerge very recently. Complex quantum networks are promising candidates for describing and understanding multidisciplinary problems, such as quantum transport in biological systems. It has been demonstrated that phenomenon of synchronization among different oscillatory modes of complex networks can be observed in the quantum regime when the nodes are in interaction with an external reservoir. On the other hand, the existence of a general connection between non-Markovianity, in terms of information backflow from the reservoir to the system, and the specific features of the reservoir is a very important basic question which does not yet have a complete answer. It is very desirable to explore this connection focussing in particular on complex quantum systems characterized by highly structured environments. In this project, we will investigate this question in the framework of quantum networks, focussing on the connection between the topology of quantum networks (seen as quantum environments), the form of the spectral distribution of the reservoir, and the behaviour of information flow. Moreover, we will also study the potential ability of the indicators of non Markovian behavior to reveal the phenomenon of synchronization in complex quantum networks. (AU)

Scientific publications (6)
(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)
LIU, BI-HENG; HU, XIAO-MIN; CHEN, JIANG-SHAN; ZHANG, CHAO; HUANG, YUN-FENG; LI, CHUAN-FENG; GUO, GUANG-CAN; KARPAT, GOKTUG; FANCHINI, FELIPE F.; PIILO, JYRKI; MANISCALCO, SABRINA. Time-invariant entanglement and sudden death of nonlocality. Physical Review A, v. 94, n. 6 DEC 9 2016. Web of Science Citations: 7.
MALVEZZI, A. L.; KARPAT, G.; CAKMAK, B.; FANCHINI, F. F.; DEBARBA, T.; VIANNA, R. O. Quantum correlations and coherence in spin-1 Heisenberg chains. Physical Review B, v. 93, n. 18 MAY 24 2016. Web of Science Citations: 38.
ADDIS, CAROLE; KARPAT, GOKTUG; MANISCALCO, SABRINA. Time-invariant discord in dynamically decoupled systems. Physical Review A, v. 92, n. 6 DEC 7 2015. Web of Science Citations: 6.
GEDIK, Z.; SILVA, I. A.; CAKMAK, B.; KARPAT, G.; VIDOTO, E. L. G.; SOARES-PINTO, D. O.; DEAZEVEDO, E. R.; FANCHINI, F. F. Computational speed-up with a single qudit. SCIENTIFIC REPORTS, v. 5, OCT 8 2015. Web of Science Citations: 28.
KARPAT, GOKTUG; PIILO, JYRKI; MANISCALCO, SABRINA. Controlling entropic uncertainty bound through memory effects. EPL, v. 111, n. 5 SEP 2015. Web of Science Citations: 17.
CAKMAK, BARIS; KARPAT, GOEKTUG; FANCHINI, FELIPE F. Factorization and Criticality in the Anisotropic XY Chain via Correlations. Entropy, v. 17, n. 2, p. 790-817, 2015. Web of Science Citations: 29.

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