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Collective effects on atomic systems, nuclear spins and cavity quantum electrodynamics

Grant number: 19/11999-5
Support type:Regular Research Grants
Duration: September 01, 2019 - August 31, 2021
Field of knowledge:Physical Sciences and Mathematics - Physics - Atomic and Molecular Physics
Principal Investigator:Celso Jorge Villas-Bôas
Grantee:Celso Jorge Villas-Bôas
Home Institution: Centro de Ciências Exatas e de Tecnologia (CCET). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil
Assoc. researchers:Carlos Eduardo Máximo ; Elnaz Darsheshdar


With the present project, we intend to continue studies on collective behavior in different physical systems. We will investigate topics related to several ongoing projects, namely: 1) the role of long-range interactions in the dynamics of atomic ensembles (two-level atoms) excited by external fields. We will investigate the connection between quantum correlations (entanglement and quantum discord) between the ensemble atoms and the properties of the light scattered throughout the ensemble. We will also extend the studies for three-level atomic systems, where we will investigate the phenomenon of electromagnetically induced transparency (EIT) taking into account such long-range interactions. We will try to understand how such interactions affect the EIT and its applications as quantum memory and reduction of the group speed of a given pulse of light; 2) Dissipative dynamics in strongly interacting systems: i) Quantum Cavity Electrodynamics (EQC) with superconducting qubits and ii) Nuclear Magnetic Resonance (NMR) nuclear spins. The first system has attracted the attention of the quantum optics community since it allows for new coupling regimes with new physical phenomena, besides being a strong candidate for the implementation of quantum computation algorithms. NMR is a system widely studied in Statistical Mechanics, very rich in thermodynamic and magnetic properties; 3) Processes in cavity QED with few atoms or quantum dot molecules in optical cavities, aiming at the implementation of quantum information processes (quantum memory, logic gates, quantum transistor), electromagnetically induced transparency (EIT) processes and nonlinear effects in the atom-field interaction considering one or two cavity modes. (AU)