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Dr Jared Jeyaretnam

Dr Jared Jeyaretnam

  • Position: Research Fellow in Quantum Many Body Physics
  • Areas of expertise: ergodicity breaking; quantum order; topological order; non-equilibrium phenomena; condensed matter theory; renormalisation group; many body localisation; quantum scars
  • Email: J.A.Jeyaretnam@leeds.ac.uk
  • Location: 3.16 Sir Henry William Bragg Building
  • Website: Bluesky | Twitter | LinkedIn | Googlescholar | ORCID

Profile

As a member of the Theory Group, I study novel out-of-equilibrium phenomena in quantum many-body physics, with Zlatko Papić as my supervisor. In particular, I am interested in ergodicity breaking, such as that observed in many-body localisation and quantum scarring. Before joining the University of Leeds, I obtained a PhD in Theoretical Condensed Matter Physics from University College London in 2023, under the supervision of Arijeet Pal; prior to this, I obtained an MSci and BA in Natural Sciences from the University of Cambridge.

Outside of research, I am passionate about science outreach: for many years, I have volunteered with Cambridge Hands on Science (CHaOS), which brings exciting hands-on science demonstrations to kids at schools and public events. I am also a keen rock climber in my spare time, as well as an enthusiastic traveller!

Research interests

I am fascinated by ergodicity-breaking phenomena, such as many-body localisation (MBL) and quantum scarring, as well as their intersection with symmetry-protected topological (SPT) order. As a PhD student at UCL, I studied both of these phenomena; in one project, I uncovered a tower of quantum scars in a spin-½ chain known to host SPT order, and showed that these scars replicated this order as well as enabling long-lived coherence in the bulk of the chain. Later, I utilised a real-space renormalisation group to study many-body resonances at the transition between two MBL phases with different SPT order; these resonances proliferate close to the critical point, ultimately leading to the breakdown of localisation and the restoration of ergodicity. Currently, I am looking at extending the latter technique to investigations of dynamics.

I am also keenly interested in tensor network techniques, such as the time-dependent variational principle (TDVP), and quantum information. In 2023 I attended the Quantum Information Processing (QIP) conference in Ghent as well as an International Quantum Tensor Network (IQTN) workshop in Edinburgh, while in 2024 I will be attending a further IQTN meeting in Glasgow.

<h4>Research projects</h4> <p>Any research projects I'm currently working on will be listed below. Our list of all <a href="https://eps.leeds.ac.uk/dir/research-projects">research projects</a> allows you to view and search the full list of projects in the faculty.</p>

Qualifications

  • PhD in Theoretical Condensed Matter Physics (UCL)
  • MSci in Natural Sciences (Cambridge)
  • MA (Cantab)