# Andrea Cavagna

- andrea.cavagna@roma1.infn.it
- (+39 06 4993 7460)

**keywords:**statistical physics, collective behaviour, flocks, swarms

### Senior Researcher

I work at the Institute for Complex Systems of the National Research Council, in Rome. I have a background in theoretical physics and statistical field theory. After studying for some time the statistical mechanics of disordered systems, as spin-glasses and supercooled liquids, my research interests shifted in the last ten years to the collective behaviour of biological systems.

**EDUCATION**

- 1999-2001 Post-Doc, Theoretical Physics, Manchester University (with Alan Bray and Mike Moore)
- 1998-1999 Post-Doc, Theoretical Physics, Oxford University (with David Sherrington)
- 1998 PhD, Theoretical Physics, University of Rome Sapienza (Spin-Glasses – advisor Giorgio Parisi)
- 1995 MSc, Theoretical Physics, University of Milan and SISSA – Trieste (Conformal Field Theory – advisor Giuseppe Mussardo)

**My lab – Collective Behaviour in Biological Systems (COBBS) **

**COLLECTIVE BEHAVIOUR**

I lead with Irene Giardina the **COBBS Lab** (Collective Behaviour in Biological Systems), whose aim is to obtain 3D experimental data in the field and to develop new theory directly from the data. My lab has been the first to combine the production of large-scale data (groups of up to 3000 individuals) with a theoretical approach inspired by statistical physics and field theory (i.e. you need to know the Goldstone theorem to work with us). Our principal systems of interest are **bird flocks** and **insect swarms**, but we are currently starting new projects on the collective properties of stem cells colonies and on the swarming dynamics of malaria mosquitoes. **Here** you can find a short list of some of our most relevant publications, with a brief commentary on each one of them.

To get a general idea of my work you can watch the **Public Lecture** that I gave at the Institut Poincare’, in Paris. Other talks and lectures can be found **here**.

If you are an italian student, ** here you can find** a recent science popularization talk that I gave at TEDx-Napoli, about collective behaviour and the order-disorder transition (in Italian).

People in my group say I’m a jerk! Check** this great video** (mostly in italian) on how it is working with me.

**TEACHING**

I teach the 40hrs course in *Statistical Field Theory *for graduate students at the PhD School in Physics at the *University Sapienza. *You can find the syllabus **here**.

**MY PREVIOUS LIFE**

In the first ten years of my career I studied non-equilibrium glassy systems, with some interdisciplinary detours. My statistical physics training was steered by Giorgio Parisi, with whom I worked on **spin-glasses** during my PhD years. My first single-author breakthrough came while a post-doc in Oxford, when I wrote a paper in which I showed that **memory was actually irrelevant** in a simple model of economic dynamics. I made a second solo contribution when I pointed out the role of unstable stationary points (**saddles**) in the free energy landscape of glassy systems to explain their different dynamical properties; this gave rise to a noteworthy **collaboration** about glasses with Kurt Broderix and Annette Zippelius. While in Oxford, Juan P. Garrahan, Irene Giardina and I were the first to study the role of the Becchi-Rouet-Stora-Tyutin (BRST) **supersymmetry** and of the related Ward identities in spin-glasses; back in Rome, our BRST line of research led to an important collaboration with Marc Mezard and Giorgio Parisi about **marginal** states in spin glasses. Later, working with Giulio Biroli, Jean P. Bouchaud, Tomas Grigera and Paolo Verrocchio, I gave an interesting contribution to the physics of glasses by measuring numerically for the first time the so-called point-to-set **correlation length**; this was the first determination of a purely static length scale growing in the glass phase and it is now a fairly standard tool in the field.

**MY PEDESTRIAN REVIEWS ON GLASSY SYSTEMS**

Check my pedagogical reviews on spin-glasses and supercooled liquids, the infamous * Spin-Glass Theory for Pedestrians* and

**Supercooled Liquids for Pedestrians.****CONTACT DETAILS**

Dr Andrea Cavagna ISC – CNR Via dei Taurini 19 00185 Rome Italy

tel: +39 06 4993 7460

fax: +39 06 4993 7440

email: andrea.cavagna@roma1.infn.it

**MONGIBELLO**

This is it, the Mongibello.