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SUMMARY:Quantum Simulation of Mesoscopic Fermi Systems - Dr. Philipp Preis
 s\,  Heidelberg University\, Germany 
DTSTART:20180116T153000Z
DTEND:20180116T163000Z
UID:TALK98731@talks.cam.ac.uk
CONTACT:Dr Ulrich Schneider
DESCRIPTION:16.1.18 Dr. Philipp Preiss  **Tuesday\, 3:30pm\, RUTHERFORD Se
 minar room**\nHeidelberg University\, Germany \n\n\nUltracold quantum gase
 s in optical potentials have achieved spectacular progress in the experime
 ntal simulation of complex quantum systems. Complementary to many-body exp
 eriments\, mesoscopic systems comprised of a small number of atoms offer t
 he possibility to study entangled quantum states with an exceptional degre
 e of versatility and control.\nWe have implemented a highly tunable platfo
 rm to study such correlated few-fermion systems. Using reconfigurable opti
 cal microtraps\, we prepare quantum states of 6Li atoms with a determinist
 ic atom number and spin configuration and tune interactions via a magnetic
  Feshbach resonance. A novel readout scheme with single-particle sensitivi
 ty allows us to measure spin-resolved correlation functions in position an
 d in momentum space.\nSuch correlators characterize few-body systems via t
 he coherence and symmetry of the wavefunction. Focusing on the Fermi-Hubba
 rd double-well\, we observe high-contrast interference of indistinguishabl
 e fermions\, the build-up of correlations due to interactions\, and the em
 ergence of entanglement between particles. Our techniques can be applied t
 o larger systems to characterize many-body phases via their higher-order c
 orrelation functions.
LOCATION:Rutherford building\, Seminar Room B
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