JFC

Mathematics·University of Oxford

Juan Felipe
Celis Rojas

PhD candidate working on topological data analysis and homotopy theory.

About

I am a Mathematics PhD student at the University of Oxford, in Mansfield College, under the supervision of Prof. Ulrike Tillmann and Prof. Heather Harrington.

I hold an MSc in Mathematics with a minor in Quantum Science and Engineering from EPFL. My work sits at the meeting point of algebraic topology, mathematical biology, and quantum computation.

Portrait of Juan Felipe Celis Rojas
Oxford, 2026

Interests

i.

Mathematics

Broadly speaking, I am interested in algebraic topology and homotopy theory. I am currently working on configuration spaces and their homotopy type. This study is highly motivated by molecular biology: the goal is to extend classical results from configuration spaces so that we can apply them to our biological setting.

In the past, I have worked on the machinery behind homological stability, with a focus on symmetric groups and mapping class groups of surfaces. I now study the harmonic compactification of the mapping class group of Riemann surfaces via Sullivan diagrams.

ii.

Quantum Science & Engineering

I study the application of quantum algorithms to topological data analysis (TDA). Recent papers show how quantum computers can be used to compute Betti numbers in persistent homology.

During my master's I focused on quantum algorithms, mainly Variational Quantum Eigensolvers. Using Riemannian geometry and Lie group theory, I showed that many VQEs are derived from the same equation, just under a different perspective.

The latest results in quantum computing have shifted my interests toward quantum error correction, fault-tolerant quantum computers, and post-quantum cryptography.

Research

Publications

  • 2024

    Finite groups as homotopy self-equivalences of finite spaces

Projects

  • MSc

    Homology of Sullivan Diagrams

  • MSc

    Riemannian Geometry of Variational Quantum Algorithms

  • Notes

    Homological Stability

  • Notes

    Homological Stability of Symmetric Groups

Talks

  • Jan 2025

    Riemannian Geometry of VQA

  • Jan 2025

    Homological stability of mapping class groups

  • Nov 2024

    Spectral sequences for homological stability

  • Oct 2024

    Quillen's small object argument

Get in touch

I'm always glad to talk algebraic topology, quantum computing, and everything that lives between them.

Email
juan.celisrojas@maths.ox.ac.uk
Department
Mathematical Institute, Oxford
College
Mansfield College
LinkedIn
juan-felipe-celis-rojas