About me

I work as a Senior Consultant for UNAFORTIS, a swiss company specialised in IT services for the financial sector. As an Avaloq Certified Professional, I work on core banking platform implementation and data migration. You can have a look at my curriculum vitae or my Linkedin profile.

I graduated with a PhD in Mathematical Physics from the University of Geneva in May 2014. For five years, I have been doing research on quantum invariants of knots, Chern-Simons theory, matrix models and topological string theory. See my list of publications.

Besides science and programming, I have a passion for athletics. I have practised athletics for many years since I was a child, especially long jump and triple jump. I used to compete for Centre athlétique de Genève until 2012. You can find my PBs here.

Each year the club organises the international meeting AtletiCAGenève, which is part of the Europe Athlétisme Promotion Circuit. I have joined the organising committee in 2010.

I also play music in a band called La Brante. In my free time, I enjoy running, reading or travelling.

Some books I have read recently

Curriculum Vitae

Professional Experience

UNAFORTIS, Zug (Switzerland)
Senior Consultant 2017 -
Consultant 2014 - 2016
University of Geneva, Geneva (Switzerland) 2009 - 2014
Research and Teaching Assistant


PhD in Mathematical Phyiscs 2009 - 2014
University of Geneva, Geneva (Switzerland)
MSc in Theoretical Phyiscs 2004 - 2009
University of Geneva, Geneva (Switzerland)


Avaloq Certified Professional 2014
Certificate of Advanced Studies "New Web Technologies", University of Geneva 2011

Technical Knowledge

Programming skills
Oracle, PL/SQL, MySQL, PHP, HTML, CSS, JavaScript, jQuery, C++, JAVA, Matlab, Phyton, LateX, Mathematica
  • Data Migration
  • Sensitive Data Separation : sensitive fields, workflow actions and rules, forms and reports compatibility, interface with external WebServices.
  • Avaloq Message Interface : XML, SOAP messages
  • Object modelling : keys, classes, additions

Volunteer Experiences

AtletiCAGenève International Track and Field Meeting 2009 -
IT Manager, Head of Competition Secretary, Webmaster
Centre Athlétique de Genève 2008 - 2015


My publications are also listed on INSPIRE and zbMATH.


Torus Knots in Lens Spaces & Topological Strings
Ann. Henri Poincaré 16(8), 1937-1967 (2015) [arXiv:1308.5509]

We study the invariant of knots in lens spaces defined from quantum Chern-Simons theory. By means of the knot operator formalism, we derive a generalization of the Rosso-Jones formula for torus knots in L(p,1). In the second part of the paper, we propose a B-model topological string theory description of torus knots in L(2,1).

The uses of the refined matrix model recursion (with A. Brini & M. Mariño)
J. Math. Phys. 52(5), 052305 (2011) [arXiv:1010.1210]

We study matrix models in the beta ensemble by building on the refined recursion relation proposed by Chekhov and Eynard. We present explicit results for the first beta-deformed corrections in the one-cut and the two-cut cases, as well as two applications to supersymmetric gauge theories: the calculation of superpotentials in N=1 gauge theories, and the calculation of vevs of surface operators in superconformal N=2 theories and their Liouville duals. Finally, we study the beta deformation of the Chern-Simons matrix model. Our results indicate that this model does not provide an appropriate description of the Omega-deformed topological string on the resolved conifold, and therefore that the beta-deformation might provide a different generalization of topological string theory in toric Calabi-Yau backgrounds.

Chern-Simons Invariants of Torus Links
Ann. Henri Poincaré 11(7), 1201-1224 (2010) [arXiv:1003.2861]

We compute the vacuum expectation values of torus knot operators in Chern-Simons theory, and we obtain explicit formulae for all classical gauge groups and for arbitrary representations. We reproduce a known formula for the HOMFLY invariants of torus links and we obtain an analogous formula for Kauffman invariants. We also derive a formula for cable knots. We use our results to test a recently proposed conjecture that relates HOMFLY and Kauffman invariants.


Knot Invariants, Chern-Simons Theory and the Topological Recursion, PhD Thesis, University of Geneva (2014)

Knot Operators in Chern-Simons Gauge Theory, Master's Thesis, University of Geneva (2009)


Twitter @SebStevan

E-mail sebastien.stevan@gmail.com