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UID:6a0f475db67ac
DTSTART:20250212T113000Z
SEQUENCE:0
TRANSP:OPAQUE
DTEND:20250212T123000Z
LOCATION:Blue Lecture Room 
SUMMARY:ICFO | ROXANA WEDOWSKI
CLASS:PUBLIC
DESCRIPTION:Interactions of isolated quantum many-body systems typically sc
 ramble local information into the entire system and make it unrecoverable1
 &ndash\;5 . Ergodicity-breaking systems possess the potential to exhibit f
 undamentally different information scrambling dynamics beyond this paradig
 m. For many-body localized systems with strong ergodicity breaking6&ndash\
 ;8 \, local transport vanishes and information scrambles logarithmically s
 lowly9 . Whereas in Rydberg atom arrays\, local qubit flips induce dynamic
 al retardation on surrounding qubits through the Rydberg blockade effect\,
  giving rise to quantum many-body scars that weakly break ergodicity10&nda
 sh\;12\, and resulting in the predicted unconventional quantum information
  spreading behaviours13. Here\, we present the first measurements of out-o
 f-time-ordered correlators and Holevo information in a Rydberg atom array\
 , enabling us to precisely track quantum information scrambling and transp
 ort dynamics. By leveraging these tools\, we observe a novel spatio-tempor
 al collapse-and-revival behaviour of quantum information\, which differs f
 rom both typical chaotic and many-body localized systems. Our experiment s
 heds light on the unique information dynamics in many-body systems with ki
 netic constraints\, and demonstrates an effective digital-analogue approac
 h to coherently reverse time evolution and steer information propagation&n
 bsp\;in near-term quantum devices.
DTSTAMP:20260521T175645Z
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