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Many-body Quantum Dynamics

Cavendish Laboratory
 

More is different

We are studying many-body phenomena at the interface between quantum optics and solid state physics.

Following a statement by P.W. Anderson, "More is Different", genuine many-body phenomena are emergent phenomena that only appear when many particles come together, typical examples being superfluidity or magnetism.

 

Ultracold Atoms in optical lattices

We study many-body phenomena using ultracold atoms, that is Bose-Einstein condensates and degenerate Fermi gases, which we load into optical lattices. These periodic optical potentials are analogous to the electrostatic potential felt by electrons in a conventional solid. Thereby, we effectively build a quantum simulator for condensed matter physics, where we can study many-body physics in a very clean and precisely controlled system and have all the tools from quantum optics at our disposal.

 

3D Lattice structure generated by three retroreflected laser beams

 

Dynamics

In particular, we can follow the dynamics of the system in real time and observe its non-equilibrium dynamics, which is typically an even richer problem than the equilibrium states.

In addition, this toolbox enables us to synthesize genuinely new many-body systems and create novel effects.

  • Strongly-correlated systems

  • Topological systems

  • Band-structure engineering

  • Out-of-equilibrium dynamics

  • Quantum quenches

  • Disordered Systems / Many-body localization

 

Projects

Latest news

Quasicrystal Paper covered in Physics World

9 April 2019

Our recent PRL on the connection between our 2D Quasicrystal and a 4D periodic crystal has been covered in Physics World.

Quasicrystal Paper published in PRL

20 March 2019

The first experimental result from the Quasicrystal lab, showing the fractal nature of the potential as well as the connection to a 4D crystal, has now been published as an Editor's suggestion in PRL.

Postdoc positions open - optical lattices

4 March 2019

Two Postdoc positions available to work on experimental many-body quantum dynamics using ultracold atomic gases and optical lattices. Application closes on 31/3/19.

Quantum Walk on fractal

5 July 2018

The first result from our brand-new setup on optical Quasicrystals is on the Arxiv.

K39 BEC

16 May 2018

We achieved Bose-Eintein condensation of K39 atoms.