Non-Markovian noise that cannot be dynamically decoupled by periodic spin echo pulses

Abstract

Dynamical decoupling is the leading technique to remove unwanted interactions in a vast range of quantum systems through fast rotations. But what determines the time-scale of such rotations in order to achieve good decoupling? By providing an explicit counterexample of a qubit coupled to a charged particle and magnetic monopole, we show that such time-scales cannot be decided by the decay profile induced by the noise: even though the system shows a quadratic decay (a Zeno region revealing non-Markovian noise), it cannot be decoupled by periodic spin echo pulses, no matter how fast the rotations.

arXiv commentminor revision

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Cited by in corpus (8)

• Strong Error Bounds for Trotter & Strang-Splittings and Their Implications for Quantum Chemistry
• Extracting Quantum Dynamical Resources: Consumption of Non-Markovianity for Noise Reduction
• Control of quantum noise: on the role of dilations
• Operational Markovianization in Randomized Benchmarking
• Efficiency of Dynamical Decoupling for (Almost) Any Spin-Boson Model
• Ancilla-Assisted Protection of Information: Application to Atom-Cavity Systems
• Stability and convergence of dynamical decoupling with finite amplitude control
• Quantum non-Markovianity elusive to interventions