Quantum error mitigation

In most of physics it is normal to obtain information by analysis of noisy data. The paradigm of quantum computing has been a simplified version of this -- one measurement of a two-level system gives one bit of reliable information about the result of a computation. But real-world quantum computers do not work this way: the noisiness of quantum evolution also requires good strategies for extracting information. This review covers many error-mitigation strategies used in present-day quantum processors. These strategies make it much more feasible to obtain useful results before fault tolerance is achieved.

• MO
  Ministry of Education, Culture, Sports, Science and Technology

  Award: JPMXS0120319794
• NN
  National Natural Science Foundation of China

  Awards: 12088101, 11875050
• IA
  Intelligence Advanced Research Projects Activity
• EA
  Engineering and Physical Sciences Research Council

  Awards: EP/T001062/1, EP/W032635/1, EP/W032635/1, EP/T001062/1
• SJ
  St. John's College, University of Oxford
• JS
  Japan Science and Technology Agency

  Awards: JPMJPR2114, JPMJMS2061
• NS
  National Safety Academic Fund

  Award: U1930403