Quantum · Theory · Computation

Laboratory for Theoretical & Quantum Informatics

We study the mathematical foundations of computer science, from quantum information and computation to classical complexity and graph theory. Based at DIRO, Université de Montréal.

About LITQ

Who we are

Welcome to the website of the Laboratory of Theoretical and Quantum Informatics (LITQ) at the Department of Computer Science and Operations Research (DIRO), Université de Montréal. Our laboratory has seven faculty members and is very active in both research and teaching.

We work on various aspects related to the foundations of computer science and physics. Our research focuses on quantum information and computation, classical and quantum cryptography, the foundations of quantum theory, computational complexity, and graph theory.

LITQ group at Quorum Ottawa 2025

Group members together with colleagues from across Québec & Ontario at the 2025 QUORUM Workshop in Ottawa.

The Team

Meet our researchers

Faculty

View All Members →
What's new

Latest news

Mar 2026

Our very own Prof. Gilles Brassard has just won the 2025 Turing Award — the most prestigious international award in computer science — together with Charles H. Bennett "for their essential role in igniting and shaping the quantum revolution in computer science and in information and communications technology"!

Selected Publications

Recent research

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Find Us

Located in Montréal

Address
Laboratoire d'informatique théorique et quantique
Département d'informatique et
de recherche opérationnelle (DIRO)
Locaux: 3344 et 3350
Pavillon André-Aisenstadt
2920 Chemin de la Tour
Montréal (Québec) H3T 1J4  Canada
How to Reach Us

Métro — Université de Montréal station (ligne bleue / blue line, exit Chemin de la Tour)

Building — Pavillon André-Aisenstadt, the mathematics and computer science building on the main UdeM campus

Parking — Paid parking available on Chemin de la Tour and at the Université de Montréal lot

🚇 Blue Line DIRO Google Maps
Montréal — Parc des Fleurs de Macadam
Montréal, Québec · Canada

LITQ is always looking for dynamic and motivated students at all levels and is very happy to welcome visitors.

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