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DTSTAMP:20260406T075637Z
UID:1717491600@ist.ac.at
DTSTART:20240604T110000
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DESCRIPTION:Speaker: Zaki Leghtas\nhosted by Johannes Fink\nAbstract: Quant
 um bits (qubits) are prone to several types of errors due to uncontrolled 
 interactions with their environment. Common strategies to correct these er
 rors are based on architectures of qubits involving daunting hardware over
 heads. A hopeful path forward is to build qubits that are inherently prote
 cted against certain types of errors\, so that the overhead required to co
 rrect remaining ones is significantly reduced. However\, the foreseen bene
 fit rests on a severe condition: quantum manipulations of the qubit must n
 ot break the protection that has been so carefully engineered. A recent qu
 bit - the cat-qubit - is encoded in the manifold of metastable states of a
  quantum dynamical system\, thereby acquiring continuous and autonomous pr
 otection against bit-flips. Here\, in a superconducting circuit experiment
 \, we implement a cat-qubit with bit-flip times exceeding 10 seconds. This
  is a four order of magnitude improvement over previous cat-qubit implemen
 tations. We prepare and image quantum superposition states\, and measure p
 hase-flip times above 490 nanoseconds. Most importantly\, we control the p
 hase of these quantum superpositions without breaking bit-flip protection.
  This experiment demonstrates the compatibility of quantum control and inh
 erent bit-flip protection at an unprecedented level\, showing the viabilit
 y of these dynamical qubits for future quantum technologies. / Ref : http
 s://arxiv.org/abs/2307.06617\, to appear in Nature.
LOCATION:Heinzel Seminar Room / Ground Floor / Office Building West\, ISTA
ORGANIZER:sandra.widdmann@ista.ac.at
SUMMARY:Zaki Leghtas: Quantum control of a cat-qubit with bit-flip times ex
 ceeding ten seconds
URL:https://talks-calendar.ista.ac.at/events/4718
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