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Everything about Dynamical decoupling

Control technique for improving qubit coherence in quantum computing

Dynamical decoupling (DD) is an open-loop quantum control technique employed in quantum computing to suppress decoherence by taking advantage of rapid, time-dependent control modulation. In its simplest form, DD is implemented by periodic sequences of instantaneous control pulses, whose net effect is to approximately average the unwanted system-environment coupling to zero. Different schemes exist for designing DD protocols that use realistic bounded-strength control pulses, as well as for achieving high-order error suppression, and for making DD compatible with quantum gates. Commonly used protocols range from the basic Carr-Purcell-Meiboom-Gill (CPMG) sequence to more advanced, non-periodic sequences like Uhrig Dynamical Decoupling (UDD) and recursive, high-order schemes like Concatenated Dynamical Decoupling (CDD). They are based on the Hahn spin echo technique of applying periodic pulses to enable refocusing and hence extend the coherence times of qubits. Wikipedia →

🧭 Start here: a 6-step reading path

  1. Read the overview: Dynamical decouplingA 5-minute orientation
  2. Skim a recent paper: Dynamical decoupling for superconducting qubits: A performance surveyInfluential work since 2022
  3. Pick up a classic book: Objects first with JavaThe most-reprinted book on the subject
  4. Read the landmark paper: Dynamical Decoupling of Open Quantum SystemsCited 1,646 times
  5. Go sideways: Quantum decoherenceA closely related topic
  6. Go sideways: Neutral atom quantum computerA closely related topic

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