Thiago Fleury is a physicist with a B.A. and M.A. from the University of São Paulo. He earned his Ph.D. from the Universidade Estadual Paulista Júlio de Mesquita Filho, where he also carried out his first post-doc. This was followed by stints at two renowned institutions: the Perimeter Institute for Theoretical Physics, Canada, and the École Normale Supérieure Paris, France.

To stay active, Thiago practices martial arts. His dream of becoming a drummer was short-lived, as he had to put down his sticks due to his demanding travel schedule. As a physicist, he focuses on theories about quantum gravity. Chess is his escape from his concerns about the universe, and he follows international championship matches online.

Science Call 2

Science Call 4

Understanding String Theory and Its Dual Theories

Science / Physics#### Amount invested

One of the greatest unsolved problems in physics is the unification of quantum mechanics and general relativity. Gravitation is described by general relativity, whereas quantum mechanics describes the behavior of matter at the microscopic level and other known interactions in nature, including electromagnetism. String theory has been used to bridge the gap between these two theories, since it provides a consistent theory of quantum gravity. In string theory, all fundamental particles are tiny strings vibrating in spacetime. A remarkable feature of string theory is holography, which states that when you have a string theory in a given volume, it can be completely reconstructed using only the information on the boundary of that volume. Holography occurs in gravitational theories, and as such, we will develop new techniques to understand it and quantum gravity by analytically calculating all the interactions of some string theories and filed theories on the boundary, such as N=4 Super-Yang-Mills.

Grant 2019: R$ 100,000.00

Understanding the Holographic Phenomenon in Quantum Gravity

Science / Physics#### Amount invested

What is quantum gravity? This fundamental question is still up in the air, despite decades of research and progress in the field. Quantum mechanics is used to understand microscopic phenomena, and a quantum theory of gravity is essential for understanding the origin of the universe and black holes. While the other known interactions have well-established quantum descriptions, gravity remains a mystery.

These questions have intrigued me since my student days. In my doctorate, I studied string theory, a consistent theory of quantum gravity. String theory posits that the fundamental particles are small vibrating strings rather than points. The theory is complex and has many open problems, but the attempt of this project is to systematically understand the holographic phenomenon, which describes physics in a volume by studying the boundary of space.

Grant 2021: R$450.000,00 (R$350.000,00 + R$ 100.000,00 optional bonus for the integration and training of people from underrepresented groups in science)

- Topics
- electromagnetism
- quantum gravity
- string theory

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