Mariana R. Barros

Post-docDipartimento di Fisica

Contact details
Email: marianarodriguesbarros[at]

Main research activities
Quantum information, quantum optics and fundamental aspects of quantum mechanics.

Scientific activity
The research activity of Mariana R. Barros has focused so far in quantum information and fundamental questions of quantum mechanics. Her formation encompassed both theoretical and experimental physics, and experiences collaborating with several groups.

During the master period, she worked in the implementation of the Deutsch – Jozsa algorithm with one qubit, using pairs of photons produced by down conversion and a SLM to input phases on the photons paths, and making use of a liquid crystal display (LCD) as a spatial light modulator (SLM) to introduce programmable phase shift in space photonic states.

During the PhD period, the main focus of the thesis was on the application of modular variables inseveral tasks of Quantum Information. Thus, an entanglement criteria to detect genuine entanglement in a D-party state was developed, aiming the application to states of multiple photons passing through multiple Young-slits, or multiple photons spread over multiple temporal wave packets. Also, using the Talbot Effect, a method to convert the state of two photons passing through Young-slits in entangled “Talbot Qdits” was proposed, demonstrating how to perform the necessary steps to test Bell’s inequalities for D dimensional systems, present violations greater than would be possible with only two levels systems. Finally, it was investigated the use of modular variables in non-contextual tests of quantum mechanics with continuous variables.

After the PhD period,her main focus was in the design and simulation of integrated optical circuits, from the circuit’s planning and design, its fabrication and characterization. Also, she was involved in quantum optics experiments making use of interferometers and GHZ-type states, in the generation of m × n dimensional states, and in studies about quantum algorithms, focusing on what are the quantum properties dependencies in its efficiency. Currently, she is working with the G-plate technology, a device that acts on the transverse momentum of photons.

Full list of publications

Teaching activities

  • 2018–2018 Federal University of Minas Gerais, Belo Horizonte, Brazil. Contract: Experimental physics teacher; Description: In charge of the course “Experimental Physics: Optics and Waves”.
  • 2018 – Participation In Board of Master Thesis Defense of João Lara Condé. “Geração e Caracterização de Estados Fotônicos Emaranhados em Modos Espaciais e Polarização” , Federal University of Minas Gerais.
  • 2016 – Co-advisor of Yohan Viana, undergraduate student. Project: Classical Analogues of Quantum Algorithms.
  • 2012–2012 Federal University of Rio de Janeiro, Rio de Janeiro, Brazil. Contract: Experimental physics teacher; Description: In charge of the course “Experimental Physics 3, Electromagnetism”.