Group Seminar via Zoom: Realizing All-to-All Spin Models with Ultracold Atoms in an Optical Cavity

July 28, 2020

Julian Wienand, Stanford University/LMU
Group meeting via video conference (Zoom)
Tuesday July 28th, 9:00 (MEZ)

Dealing with the unique situation of partial lock downs worldwide and home office solutions at our Institute due to the current spreading of the Covid 19 virus, we are now holding our group seminars and journal clubs via video conference. This procedure enables us to continue our research, enhance discussions and exchange important information.


Non-local quantum systems can set the stage for extreme forms of quantum information processing such as fast scrambling in black holes.  Using ultracold atoms in an optical cavity, and by making the intra-cavity photons mediate interactions, we engineer a complete graph of spin-spin couplings with tunable anisotropy.  A state-dependent imaging scheme allows to read out the state vector in the Bloch sphere along the 1d ensemble of trapped atoms and watch both Ising and spin exchange interactions at play. This lays the groundwork for exploring the phase diagram of the all-to-all 1d Heisenberg model. To distinguish integrability and chaos in measured time evolutions, an algorithm based on singular value decomposition (SVD) is proposed and tested with simulated data.

If you would like to join our group seminars via Zoom, please contact us for more information.

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