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DTSTART:20240310T070000
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DTSTART:20231105T060000
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DTSTART;TZID=America/Toronto:20240409T113000
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URL:https://uwaterloo.ca/institute-for-quantum-computing/events/new-techniq
 ues-fast-and-high-fidelity-trapped-ion-0
LOCATION:QNC - Quantum Nano Centre 200 University Avenue West 0101 Waterloo
  ON N2L 3G1 Canada
SUMMARY:New Techniques for Fast and High-Fidelity Trapped Ion Interconnects
CLASS:PUBLIC
DESCRIPTION:IQC SEMINAR - JAMESON O'REILLY\, DUKE UNIVERSITY\n\nQuantum-Nan
 o Centre\, 200 University Ave West\, Room QNC 0101 \nWaterloo\, ON CA N2L
  3G1\n\nTrapped atomic ions are a leading candidate platform for quantum\n
 simulation and computing but system sizes are limited by motional mode\ncr
 owding and transport overhead. Multiple reasonably-sized\,\nwell-controlle
 d modules can be connected into one universal system\nusing photonic inter
 connects\, in which photons entangled with ions in\neach trap are collecte
 d into and detected in a Bell-state analyzer.\nThe speed of these intercon
 nects has heretofore been limited by the\nuse of 0.6 NA objectives and the
  need to periodically pause\nentanglement attempts for recooling. In this 
 work\, we use a system\nwith two in-_vacuo_ 0.8 NA lenses on either side 
 of an ion trap to\ncollect 493 nm photons from barium ions and demonstrate
  the most\nefficient free-space ion trap photonic interconnect to date. In
 \naddition\, we introduce an ytterbium ion as a sympathetic coolant\ndurin
 g the entangling attempts cycle to remove the need for recooling\,\nenabli
 ng a record photon-mediated entanglement rate between two\ntrapped ions. T
 he major remaining error source is imperfections in the\nphoton polarizati
 on encoding\, so we also develop a new protocol for\nremotely entangling t
 wo ions using time-bin encoded photons and\npresent preliminary results of
  an experimental implementation.\nFinally\, we prepare the first remote en
 tangled state involving two\nbarium ions in separate vacuum chambers.
DTSTAMP:20260419T072736Z
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