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Theoretical physicists working at a blackboard collaboration pod in the Beecroft building.
Credit: Jack Hobhouse

Samuel Garratt

Visitor - computer account only

Sub department

  • Rudolf Peierls Centre for Theoretical Physics

Research groups

  • Condensed Matter Theory
samjgarratt@gmail.com
Rudolf Peierls Centre for Theoretical Physics
  • About
  • Publications

I recently completed my DPhil in condensed matter theory, supervised by John Chalker. From Autumn I will be based in UC Berkeley.

My research currently focuses on the behaviour of quantum-mechanical systems made up from strongly interacting particles. Ordinarily one finds standard thermal behaviour, but if the system is well-isolated from the environment there is another possibility: many-body localisation. Quantum systems in the many-body localised phase evade standard thermalisation. This difference in dynamics has signatures in energy spectra, which I have been studying for the last couple of years [Phys. Rev. X 11, 021051 and Phys. Rev. Lett. 127, 026802].

Before that I worked on frustrated magnets. These systems have many low energy states, a fact with strong implications for the dynamics at low temperatures. We developed a hydrodynamic theory of spin waves [Phys. Rev. B 101, 024413] with some interesting departures from the conventional Halperin-Saslow theory. Back further still, I worked with a group studying ultracold gases [Phys. Rev. A 99, 021601(R), see also Phys. Rev. Lett. 126, 060402].

Alongside research, I hold a stipendiary lectureship at St. Hugh's college; I have covered courses in mathematical methods, quantum mechanics, statistical mechanics and condensed matter [all for the MPhys]. I have also tutored and organised the problem classes for quantum field theory [MMathPhys].

Research interests

Quantum chaos
Many-body localisation
Frustrated magnetism
Ultracold gases

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