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Arbitrarily Accurate Pulse Sequences for Robust Dynamical Decoupling
Genko T Genov1, Daniel Schraft1, Nikolay V Vitanov2
1Institut für Angewandte Physik, Technische Universität Darmstadt, Hochschulstr. 6, 64289 Darmstadt, Germany.
Physical Review Letters
|April 15, 2017
Summary
We developed new universally robust sequences for dynamical decoupling that correct errors from pulse imperfections and dephasing. These sequences are efficient, versatile, and outperform existing methods in experiments.
Area of Science:
- Quantum information science
- Quantum control and error correction
Background:
- Dynamical decoupling is crucial for preserving quantum information.
- Existing methods struggle with pulse imperfections and environmental dephasing.
- Robustness and efficiency are key challenges in quantum error correction.
Purpose of the Study:
- To introduce universally robust sequences for dynamical decoupling.
- To compensate for pulse imperfections and dephasing simultaneously and to arbitrary order.
- To improve performance across various conditions and pulse shapes.
Main Methods:
- Development of novel dynamical decoupling sequences.
- Theoretical analysis of sequence performance and scaling.
- Experimental implementation and validation in a solid-state optical memory.
Main Results:
- Sequences achieve arbitrary order compensation for pulse errors and dephasing.
- The number of pulses scales linearly with the order of compensation.
- Experimental data confirms superior performance over state-of-the-art methods.
Conclusions:
- Universally robust sequences offer a significant advancement in quantum error suppression.
- The proposed method is broadly applicable to various quantum systems.
- Experimental success demonstrates practical viability for quantum memory applications.