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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.

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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.