Interdisciplinary workshop on the foundations of QFT uniting philosophical, historical, and mathematical perspectives of relativistic quantum physics.

The workshop will address conceptual issues that are underlying the ongoing interest of the quantum foundations and (relativistic) quantum information community in quantum field theory. Leading experts will deliver talks centered around relativistic causality, local measurements, interface with the semi-classical or classical regime, interpretations, as well as historical developments. The workshop format will consist of invited talks followed by discussion sessions.

Invited speakers:

• Emily Adlam (Chapman University)
• Charis Anastopoulos (University of Patras)
• Guido Bacciagaluppi (Utrecht University)
• Alex Blum (California Institute of Technology)
• Jeremy Butterfield (University of Cambridge)
• Lajos Diósi (Wigner Research Centre for Physics, Budapest)
• Chris Fewster (University of York)
• Doreen Fraser (University of Waterloo)
• James Fraser (Aix-Marseille University)
• Adrian Kent (University of Cambridge)
• Eduardo Martín-Martínez (University of Waterloo)
• Miklós Rédei (London School of Economics)
• Kasia Rejzner (University of York)
• Noel Swanson (University of Delaware)
• Rainer Verch (Leipzig University)
• David Wallace (University of Pittsburgh)
• Robert Wald (University of Chicago)

Schedule [pdf]:

Monday 01/06

Time

Session

9:00-9:30 AMReception / coffee
9:30-11:00 AM

Local measurement and relativistic causality I

C. Fewster – “State updates in quantum field theory”

D. Fraser – “No superluminal causal influence in QFT with a local measurement theory”

E. Martín-Martínez – “What happens when one measures a quantum system in a relativistic setting?”

11:00-11:30 AMCoffee break / posters
11:30 AM-12:30 PMDiscussion
12:30-2:00 PMLunch Break
2:00-3:30 PM

Gravity and interpretations of relativistic quantum theory

R. Wald – “Black Holes Decohere Quantum Superpositions”

L. Diósi – “A healthier stochastic semiclassical gravity: world without Schrödinger cats”

G. Bacciagaluppi – “The Relativity of Branching”

3:30-4:00 PMCoffee break / posters
4:00-5:00 PMDiscussion

Tuesday 02/06

Time

Session

9:15-11:00 AM

Historical and contemporary perspectives on foundations of QFT

A. Blum – “Origins of Axiomatic QFT”

J. Fraser – “How far can we go with divergent series?”

K. Rejzner – “Thoughts on semilocal quantum physics”

11:00-11:30 AMCoffee break / posters
11:30 AM-12:30 PMDiscussion
12:30-2:00 PMLunch Break
2:00-3:30 PM

Local mesurement and relativistic causality II

M. Rédei – “Facets of relativistic locality”

N. Swanson – “Local Measurement and the Type III Property in Algebraic QFT” 

R. Verch – “Probing non-equilibrium of relativistic quantum dynamical systems”

3:30-4:00 PMCoffee break / posters
4:00-5:00 PMDiscussion

Wednesday 03/06

Time

Session

9:30-11:00 AM

The Measurement Problem in Relativistic Quantum Theory

C. Anastopoulos – “What happens between in and out? Events do.”

E. Adlam – “Do we have any viable solution to the measurement problem?”

A. Kent – “Quantum Reality from Late Time Boundary Conditions: Problems and Possibilities”

11:00-11:30 AMCoffee break / posters
11:30 AM-12:30 PMDiscussion
12:30-2:00 PMLunch Break
2:00-3:00 PM

Realism about effective field theories

D. Wallace – “Quanta and Particles in Effective Field Theory” 

J. Butterfield – “Renormalisation and realism”

3:00-4:00 PMDiscussion & Concluding Remarks

Book of Abstracts:

[Download PDF]

Funding:

The workshop acknowledges substantial funding by the RQI COST action (CA 23115), Quantum Science Austria (quantA) and the Institute for Quantum Optics and Quantum Information (IQOQI) Vienna.

 

Location:

Campus Akademie (ÖAW), 1st District
(Bäckerstraße 13, 1010 Wien)


Time:

1st - 3rd of June 2026


Organizing Team:

Doreen Fraser (University of Waterloo)
Jan Mandrysch (IQOQI Vienna)
Maria Papageorgiou (IQOQI Vienna)

With assistance from Konstantinos Manos, Robin Simmons, and the IQOQI administration team.

Contact: qftfoundations 'at' oeaw.ac.at


Photos and Recording: 

Please note that photos and video recordings will be taken during the workshop. If you prefer not to appear on them, please contact us.

 


Code of Conduct:

This workshop follows the Code of Conduct of the RQI COST Action. The contact people are workshop organizer Doreen Fraser (doreen.fraser 'at' uwaterloo.ca), RQI-Cost Working Group 5 Co-Leader Maria Jivulescu (maria.jivulescu 'at' upt.ro), and Charis Anastopoulos (anastop'at'upatras.gr).


Registration has closed.