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Quantumness of composite systems: geometry, dynamics and thermodynamics


The quantum information science is an area of knowledge of recent development. It is based on the study of physics of quantum properties of composite systems that enable new and more efficient ways to encode, process and distribute information among the parties. Despite the rapid growth of the area in the last two decades, particularly with regard to the development of marketable technologies related to cryptography and computing, the fragility of the effects of decoherence in most quantum resources has hampered the large-scale development of networks secure quantum communication. In this project we will discuss ideas relating both foundations and applications of Physics of Quantum Information. Regarding foundations, we are going to investigate problems related to generation of a non-Markovian dynamics, the connection between quantum states geometry and non-equilibrium Thermodynamics, and finally the role of time in quantum theory through a model of quantum clock. Regarding applications, we are going to investigate how a metrological quantity can be used to infer the degree of correlation of a quantum state, also study the effect of a non-Markovian dynamics in the efficiency of a quantum heat engine, implementing a protocol sequential quantum metrology for estimating the temperature of a thermal bath, and finally how to classify the dynamics of a system using fluctuation relations. In some of these threads will use quantum simulators based on room temperature Nuclear Magnetic Resonance systems as prototypes for testing realistic conditions. (AU)

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Scientific publications (5)
(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)
MARTINS, JACKES; DEFAVERI, LUCIANNO; SOARES-PINTO, DIOGO O.; DUARTE QUEIROS, SILVIO M.; MORGADO, WELLES A. M. Non-Markovianity, entropy production, and Jarzynski equality. Physical Review E, v. 103, n. 2 FEB 5 2021. Web of Science Citations: 0.
HU, CHANG-KANG; SANTOS, ALAN C.; CUI, JIN-MING; HUANG, YUN-FENG; SOARES-PINTO, DIOGO O.; SARANDY, MARCELO S.; LI, CHUAN-FENG; GUO, GUANG-CAN. Quantum thermodynamics in adiabatic open systems and its trapped-ion experimental realization. NPJ QUANTUM INFORMATION, v. 6, n. 1 AUG 26 2020. Web of Science Citations: 0.
MOREIRA, V, S.; MARQUES, B.; PAIVA, R. R.; CRUZ, L. S.; SOARES-PINTO, D. O.; SEMIAO, F. L. Enhancing quantum transport efficiency by tuning non-Markovian dephasing. Physical Review A, v. 101, n. 1 JAN 27 2020. Web of Science Citations: 0.
MENDES, LEANDRO R. S.; SOARES-PINTO, DIOGO O. Time as a consequence of internal coherence. PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SC, v. 475, n. 2231 NOV 29 2019. Web of Science Citations: 1.
MARTINELLI, TIAGO; SOARES-PINTO, DIOGO O. Quantifying quantum reference frames in composed systems: Local, global, and mutual asymmetries. Physical Review A, v. 99, n. 4 APR 26 2019. Web of Science Citations: 2.

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