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PRODID:UW-Madison-Physics-Events
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SEQUENCE:0
UID:UW-Physics-Event-3704
DTSTART:20150512T150000Z
DURATION:PT1H0M0S
DTSTAMP:20260419T124425Z
LAST-MODIFIED:20150420T134831Z
LOCATION:5310 Chamberlin Hall
SUMMARY:A leakage-resilient approach to topological quantum error corr
 ection with superconducting elements\, R. G. Herb Condensed Matter Sem
 inar\, Joydip Ghosh\, University of Calgary
DESCRIPTION:Superconducting qubits\, while promising for scalability a
 nd long coherence times\, contain more than two energy levels\, and th
 erefore are susceptible to errors generated by the leakage of populati
 on outside of the computational subspace. Such leakage errors are curr
 ently considered to be a prominent roadblock towards fault-tolerant qu
 antum computing with superconducting qubits. Fault-tolerant quantum co
 mputing using topological codes is based on sequential measurements of
  multi-qubit stabilizer operators. In this talk\, I propose a leakage-
 resilient scheme to perform repetitive measurements of multi-qubit sta
 bilizer operators\, and then discuss how to use this scheme as an ingr
 edient to develop a leakage-resilient approach for surface code quantu
 m error correction with superconducting circuits. Our protocol is base
 d on SWAP operations between data and ancilla qubits at the end of eve
 ry cycle\, requiring read-out and reset operations on every physical q
 ubit in the system\, and thereby preventing persistent leakage errors 
 from occurring.
URL:https://www.physics.wisc.edu/events/?id=3704
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