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Many-body Quantum Dynamics

Cavendish Laboratory
 
Quantum Walk on fractal

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

Matter-wave diffraction from a quasicrystalline optical lattice 

 

In this work, we report on the first experimental demonstration of an eightfold symmetric optical lattice, realising a two-dimensional quasicrystalline potential for ultracold atoms. Using matter-wave diffraction we observe the striking self-similarity of the quasicrystalline structure. The diffraction dynamics on short timescales constitutes a continuous-time quantum walk on a homogeneous four-dimensional tight-binding lattice. These measurements pave the way for quantum simulation in higher dimensions.

 

Konrad Viebahn, Matteo Sbroscia, Edward Carter, Jr-Chiun Yu, Ulrich Schneider
arXiv:1807.00823

 

 

Subject: 

Latest news

News & Views on first-order phase transition

31 March 2022

Bryce Gadway wrote a News & Views article for Nature Physics on our paper on Realizing Discontionuous Phase Transitrions. Check it out: https://www.nature.com/articles/s41567-022-01543-w

Towards quantum simulation of false vacuum decay

20 January 2022

In our lastest work we have used a resonantly driven optical lattice to turn the Mott transition into a first-order (discontinuous) transition. We were able to directly observe the associated hysteresis and metastability, where the system remains stuck in its original phase (the false vacuum) even though the ground state...

First AION collaboration workshop

11 November 2021

Finally, we were able to hold teh first in-person collaboration of the new AION collaboration, where we want to develop large scale atom interferometers. aion_collaboration_nov21_2mp.jpg

Postdoc positions Open

2 December 2020

Two new Postdoc positions available to work with us on experiments with ultracold atoms in and out of optical lattices. Application closes on 3/1/21.

Localisation paper published in PRL

13 November 2020

Our latest work on Observing localisation in a 2D quasicrystalline optical lattice was published today in PRL. Quasicrystals are long-range ordered but not periodic, representing an interesting middle ground between order and disorder. We experimentally and numerically study the localization transition in the ground state...