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SUMMARY:Topological pumping and quantum information - Konrad Viebahn ETH Z
 urich
DTSTART:20260212T153000Z
DTEND:20260212T164500Z
UID:TALK244621@talks.cam.ac.uk
CONTACT:Dr Ulrich Schneider
DESCRIPTION:Topological pumps provide a powerful method for transporting p
 articles with remarkable precision by slowly and cyclically modulating a l
 attice potential. This transport is topologically protected - a feature it
  shares with the quantum Hall effect - making it inherently robust against
  noise and experimental imperfections.\nIn this talk\, I will introduce a 
 novel paradigm for this concept: moving beyond the transport of individual
  particles to the pumping of qubits carrying quantum information. Our expe
 riments\, which employ ultracold fermions in dynamical optical lattices [1
 \,2]\, demonstrate the coherent transport of not only single atoms but als
 o entangled atom pairs over hundreds of lattice sites. This capability all
 ows us to perform fundamental quantum computations during transport\, incl
 uding high-fidelity two-qubit gates. I will show how we can chain these op
 erations together to build non-local quantum circuits and generate complex
  entanglement patterns across the lattice.\n\n[1] Zhu et al. PRX (2025) 
 “Splitting and connecting singlets in atomic quantum circuits”\n[2] ar
 Xiv:2507.22112 “Protected quantum gates using qubit doublons in dynamica
 l optical lattices”
LOCATION:Ray Dolby Centre\, 2nd floor seminar room\, PHY-RDC B2.002 
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