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UID:455d117b344d3194e7190fa33ca0bc0c
CATEGORIES:Mathematical Physics Seminar
CREATED:20210614T133549
SUMMARY:Error correction of a logical quantum bit encoded in a superconducting cavity
LOCATION:zoom
DESCRIPTION:The accuracy of logical operations on quantum bits (qubits) must be improve
 d for quantum computers to surpass classical ones in useful tasks. To that 
 effect, quantum information must be robust to noise that affects the underl
 ying physical system. Rather than suppressing noise, quantum error correcti
 on aims at preventing it from causing logical errors. This approach derives
  from the reasonable assumption that noise is local: it does not act in a c
 oordinated way on different parts of the physical system. Therefore, if a l
 ogical qubit is encoded non-locally, it is possible, during a limited time,
  to detect and correct noise-induced evolution before it corrupts the encod
 ed information. We will discuss how recent experiments [1, 2] based on supe
 rconducting cavities and transmon artificial atoms - employed here as ancil
 lary non-linear elements - realize this error correction, and its prospect 
 for reservoir engineering implementations that would realize the desirable 
 next stage: fully autonomous quantum error correction.\n[1] Grimm et al. , 
 Nature, 584, 205–209 (2020); [2] Campagne-Ibarcq et al., Nature, 584, 368-3
 72 (2020).\n
X-ALT-DESC;FMTTYPE=text/html:<p>The accuracy of logical operations on quantum bits (qubits) must be impr
 oved for quantum computers to surpass classical ones in useful tasks. To th
 at effect, quantum information must be robust to noise that affects the und
 erlying physical system. Rather than suppressing noise, quantum error corre
 ction aims at preventing it from causing logical errors. This approach deri
 ves from the reasonable assumption that noise is local: it does not act in 
 a coordinated way on different parts of the physical system. Therefore, if 
 a logical qubit is encoded non-locally, it is possible, during a limited ti
 me, to detect and correct noise-induced evolution before it corrupts the en
 coded information. We will discuss how recent experiments [1, 2] based on s
 uperconducting cavities and transmon artificial atoms - employed here as an
 cillary non-linear elements - realize this error correction, and its prospe
 ct for reservoir engineering implementations that would realize the desirab
 le next stage: fully autonomous quantum error correction.</p><p>[1] Grimm e
 t al. , Nature, 584, 205–209 (2020); [2] Campagne-Ibarcq et al., Nature, 58
 4, 368-372 (2020).</p>
CONTACT:Michel Devoret - Yale Quantum Institute
DTSTAMP:20260830T110327
DTSTART;TZID=America/New_York:20210623T104500
DTEND;TZID=America/New_York:20210623T234500
SEQUENCE:0
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