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Anomalous behavior in entanglement speed profile through spin chains
Fatemeh Sadeghi1, Mostafa Motamedifar1, Mojtaba Golshani1
1Faculty of Physics, Shahid Bahonar University of Kerman, Kerman 7616913439, Iran.
Physical Review. E
|May 17, 2024
Summary
This study explores how staggered Dzyaloshinskii-Moriya interaction (STDMI) affects quantum entanglement in spin chains. It reveals that initial conditions significantly influence entanglement spread, with wave interference explaining anomalous speed drops.
Area of Science:
- Condensed Matter Physics
- Quantum Information Science
Background:
- Dzyaloshinskii-Moriya interaction (DMI) is crucial for chiral magnetism.
- Modulated DMI enhances magnetic phases and information transmission in spin chains.
Purpose of the Study:
- Investigate the impact of staggered DMI (STDMI) on quantum entanglement propagation in Heisenberg XX spin chains.
- Analyze the influence of initial state conditions and phase factors on entanglement spreading speed.
Main Methods:
- Theoretical analysis of a spin chain model with STDMI and Heisenberg XX interaction.
- Examination of entanglement propagation dynamics under varying coupling strengths and initial states.
Main Results:
- Enhanced STDMI intensity improves entangled quantum state propagation.
- Initial state conditions profoundly affect entanglement spreading speed.
- Anomalous, dramatic drops in entanglement speed occur at specific phase factor values, predictable by wave interference.
Conclusions:
- STDMI significantly influences quantum entanglement dynamics in spin chains.
- Wave interference principles explain the observed anomalous entanglement speed behavior.
- Findings suggest potential applications for STDMI in quantum information processing.
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