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Related Concept Videos

Double Resonance Techniques: Overview01:12

Double Resonance Techniques: Overview

Double resonance techniques in Nuclear Magnetic Resonance (NMR) spectroscopy involve the simultaneous application of two different frequencies or radiofrequency pulses to manipulate and observe two distinct nuclear spins. One important application of double resonance is spin decoupling, which selectively suppresses coupling with one type of nucleus while observing the NMR signal from another nucleus, simplifying the spectrum and enhancing resolution.
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The de Broglie Wavelength02:32

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Related Experiment Video

Updated: May 9, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs
06:42

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

Noise-resilient quantum evolution steered by dynamical decoupling.

Gang-Qin Liu1, Hoi Chun Po, Jiangfeng Du

  • 1Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.

Nature Communications
|August 6, 2013
PubMed
Summary
This summary is machine-generated.

This study demonstrates a noise-resilient quantum control method using dynamical decoupling to protect qubits. A self-protected quantum gate was implemented, achieving high fidelity and extending qubit coherence time for realistic quantum computing.

Related Experiment Videos

Last Updated: May 9, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs
06:42

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

Area of Science:

  • Quantum Computing
  • Quantum Control
  • Condensed Matter Physics

Background:

  • Realistic quantum computing necessitates noise-resilient quantum control.
  • Dynamical decoupling is a technique to protect qubit coherence.

Purpose of the Study:

  • To demonstrate non-trivial quantum evolution steered by dynamical decoupling.
  • To implement a noise-resilient controlled-NOT gate for quantum computing.

Main Methods:

  • Engineered dynamical decoupling control on the electron spin of a nitrogen-vacancy center.
  • Implementation of a self-protected controlled-NOT gate with a nearby carbon-13 nuclear spin in diamond at room temperature.

Main Results:

  • Achieved a final state fidelity of 0.91(1) in preparing a Bell state.
  • Extended qubit coherence time by at least 30-fold.
  • Demonstrated a scheme applicable to general qubit systems, as control does not need to commute with qubit interaction.

Conclusions:

  • This work represents a significant step towards building realistic quantum computing systems.
  • The developed method offers a robust approach for noise suppression in quantum control.
  • The self-protected gate design enhances the feasibility of fault-tolerant quantum computation.