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Related Experiment Video

Updated: Jan 20, 2026

Gradient Echo Quantum Memory in Warm Atomic Vapor
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Published on: November 11, 2013

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Tuning high-Q nonlinear dynamics in a disordered quantum magnet.

D M Silevitch1, C Tang1, G Aeppli2,3,4

  • 1Division of Physics, Mathematics, and Astronomy, California Institute of Technology, Pasadena, California, 91125, USA.

Nature Communications
|September 7, 2019
PubMed
Summary
This summary is machine-generated.

Researchers found coherent spin clusters in a disordered quantum magnet, a rare phenomenon. This discovery in LiHo0.045Y0.955F4 could advance the search for new qubit platforms.

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Area of Science:

  • Quantum Magnetism
  • Condensed Matter Physics
  • Quantum Information

Background:

  • Quantum states typically require perfect atomic arrangements to exhibit coherence and interference.
  • Disordered quantum magnets rarely display these properties due to imperfect atomic structures.

Purpose of the Study:

  • To demonstrate quantum coherence and interference in a disordered quantum magnet.
  • To identify and characterize localized two-level systems within such a material for potential qubit applications.

Main Methods:

  • Driving the disordered quantum magnet nonlinearly.
  • Measuring the spectral response to identify a hole.
  • Analyzing the Fano shape of the spectral hole to extract information on lifetime and mixing.

Main Results:

  • Demonstrated coherent spin clusters in a disordered quantum magnet (LiHo0.045Y0.955F4).
  • Achieved high quality factors (Q up to 100,000) for spectral holes.
  • Tuned system dynamics by manipulating the Fano mixing parameter (q).

Conclusions:

  • Localized two-level systems in disordered magnets can exhibit quantum coherence.
  • This finding advances the search for novel qubit platforms from many-body systems.