Skip to main content
Guilherme Franzmann

Guilherme Franzmann

Nordita Assistant Professor

Quantum Information

High Energy Physics

About

I am a theoretical physicist working at the interface of quantum foundations, quantum gravity, and cosmology, with a particular interest in how spacetime and subsystem structure may emerge from quantum theory. My work combines tools from quantum information, quantum field theory, and philosophy of physics to study questions about locality, entanglement, reference frames, and the status of spacetime in fundamental physics. I am also interested in connecting these foundational questions to laboratory tests, cosmology, and possible observational signatures.

I am an Assistant Professor at NORDITA, where I lead the Quantum Foundations and Gravity group and am Principal Investigator of the Olle Engkvists Stiftelse-funded project Spacetime Emergence from Quantum Mechanics: From Theory to Observations (2024–2028). I co-founded and lead EmerGe, an international collaboration bringing together physicists and philosophers to investigate spacetime emergence.

My earlier work spans string cosmology, dark energy, and early-universe theory. I also co-founded ScientiFika, an outreach and community-building initiative offering accessible science events in Stockholm (https://scientifika.se/).

"Subsystems independence in gravitationally induced entanglement proposals."

Nicolas Boulle and Guilherme Franzmann. Physical Review D 114, 025015 (2026).

"On the emergence of preferred structures in quantum theory."

Antoine Soulas, Guilherme Franzmann and Andrea Di Biagio. arXiv preprint (2025).

"Subsystem entanglement and separability in quantum reference frames."

T. Rick Perche, Natália Salomé Móller and Guilherme Franzmann. arXiv preprint (2025).

"Realism and Ontology in Quantum Mechanics and String Theory."

Richard Dawid and Guilherme Franzmann. arXiv preprint (2025).

"To be or not to be, but where?."

Guilherme Franzmann. arXiv preprint (2024).

"Modified gravity approaches to the cosmological constant problem."

FADE Collaboration: Heliudson Bernardo, Benjamin Bose, Guilherme Franzmann, Steffen Hagstotz, Yutong He, Aliki Litsa and Florian Niedermann. Universe 9(2), 63 (2023).

"String cosmology backgrounds from classical string geometry."

Heliudson Bernardo, Robert Brandenberger and Guilherme Franzmann. Physical Review D 103, 043540 (2021).

Emergent Spacetime Phenomenology

Gravitational-Quantum Systems

Space and Time Emergence

2026

JSPS BRIDGE Fellowship | Japan Society for the Promotion of Science (JSPS) | Japan

2019

Nordita Fellowship (2019–2021) | Nordita | Sweden

2019

Best PhD Student, Laboratory PhysMath 2018–19 | CRM, Université de Montréal | Canada

2018

Japan Society for the Promotion of Science Fellowship | Japan Society for the Promotion of Science | Japan

2017

PBEEE Excellence Scholarship for International Students (2017–2018) | FRQNT | Canada

2014

Science Without Borders Fellowship (2014–2018) | CNPq | Brazil

2012

Best Student in the BSc Physics graduating class | Federal University of Santa Catarina (UFSC) | Brazil