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Decoherence in spin wave propagation via precursor pulses during signal equilibration
Cameron Aidan McEleney1, Robert E Camley2, Rair Macêdo3
1James Watt School of Engineering, Electronics & Nanoscale Engineering Division, University of Glasgow, Glasgow, G12 8QQ, UK.
Scientific Reports
|February 6, 2025
Summary
Spin wave generation causes dispersive decoherence, appearing as precursors. This effect is linked to the spin wave dispersion relation
Area of Science:
- Physics
- Materials Science
Background:
- Oscillating signals are crucial for information transfer but face challenges from dispersive decoherence and nonlinear phenomena.
- Wave patterns can emerge from signal dispersion in matter, sometimes preceding the main signal.
Purpose of the Study:
- To investigate how spin wave generation leads to dispersive decoherence in the form of precursors.
- To analyze the influence of the spin wave dispersion relation's shape on decoherence across different frequency regimes.
- To determine if nonlinearity is a prerequisite for this decoherence phenomenon.
Main Methods:
- Quantifying decoherence across three distinct frequency regimes.
- Analyzing the spin wave dispersion relation's characteristics.
- Investigating the role of nonlinearity in precursor formation.
Main Results:
- Spin wave generation inherently produces dispersive decoherence manifesting as precursors.
- The shape of the spin wave dispersion relation dictates the degree of decoherence.
- Decoherence occurs even without nonlinear effects.
Conclusions:
- Understanding the link between spin wave dispersion and decoherence is key.
- This knowledge can facilitate the design of advanced magnonic devices.
- Potential applications include magnonic computing and signal processing with improved signal resolution.
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