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DTSTAMP:20260424T113949Z
UID:64b51fc6c3e2a840427237@ist.ac.at
DTSTART:20230727T130000
DTEND:20230727T140000
DESCRIPTION:Speaker: Christian Siegele\nhosted by Johannes Fink\nAbstract: 
 The GKP code allows for generic error-correction of a qubit encoded in a h
 armonic oscillator. Recent experiments have demonstrated the stabilization
  of the code manifold based on Rabi interactions with an ancillary two-lev
 el system. However\, these schemes suffer from uncorrectable logical flips
  triggered by ancilla relaxation errors during the interaction. We propose
  a protocol to stabilize the GKP code in a target mode by mapping its erro
 r syndromes to an ancillary GKP mode via a quadrature-quadrature interacti
 on. In contrast to previously proposed schemes\, coupling to solely one an
 cilla quadrature allows tailoring the ancilla state and its preparation ac
 cordingly to ensure a strong suppression of back-propagating errors to the
  target mode. The error-syndrome information is retrieved and the ancilla 
 efficiently re-initialized using similar techniques demonstrated in the re
 cent GKP experiments. For realistic system parameters\, numerical simulati
 ons confirm the robust suppression of ancilla induced logical errors and s
 how an enhancement of the logical qubit lifetime by an order of magnitude 
 beyond the break-even point.
LOCATION:Office Bldg West / Ground floor / Heinzel Seminar Room (I21.EG.101
 )\, ISTA
ORGANIZER:swiddman@ist.ac.at
SUMMARY:Christian Siegele: GKP code error-correction with robust ancilla er
 ror suppression
URL:https://talks-calendar.ista.ac.at/events/4341
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