中国物理B ›› 2024, Vol. 33 ›› Issue (9): 90501-090501.doi: 10.1088/1674-1056/ad5aed

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Noise-induced phase transition in the Vicsek model through eigen microstate methodology

Yongnan Jia(贾永楠), Jiali Han(韩佳丽), and Qing Li(李擎)†   

  1. School of Automation and Electrical Engineering, University of Science and Technology Beijing, Beijing 100083, China
  • 收稿日期:2024-04-15 修回日期:2024-06-14 接受日期:2024-06-24 发布日期:2024-08-15
  • 通讯作者: Qing Li E-mail:liqing@ies.ustb.edu.cn
  • 基金资助:
    This work was supported by the National Natural Science Foundation of China (Grant No. 62273033).

Noise-induced phase transition in the Vicsek model through eigen microstate methodology

Yongnan Jia(贾永楠), Jiali Han(韩佳丽), and Qing Li(李擎)†   

  1. School of Automation and Electrical Engineering, University of Science and Technology Beijing, Beijing 100083, China
  • Received:2024-04-15 Revised:2024-06-14 Accepted:2024-06-24 Published:2024-08-15
  • Contact: Qing Li E-mail:liqing@ies.ustb.edu.cn
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (Grant No. 62273033).

摘要: This paper presents a comprehensive framework for analyzing phase transitions in collective models such as the Vicsek model under various noise types. The Vicsek model, focusing on understanding the collective behaviors of social animals, is known due to its discontinuous phase transitions under vector noise. However, its behavior under scalar noise remains less conclusive. Renowned for its efficacy in the analysis of complex systems under both equilibrium and non-equilibrium states, the eigen microstate method is employed here for a quantitative examination of the phase transitions in the Vicsek model under both vector and scalar noises. The study finds that the Vicsek model exhibits discontinuous phase transitions regardless of noise type. Furthermore, the dichotomy method is utilized to identify the critical points for these phase transitions. A significant finding is the observed increase in the critical point for discontinuous phase transitions with escalation of population density.

关键词: Vicsek model, phase transitions, eigen microstate method, noise

Abstract: This paper presents a comprehensive framework for analyzing phase transitions in collective models such as the Vicsek model under various noise types. The Vicsek model, focusing on understanding the collective behaviors of social animals, is known due to its discontinuous phase transitions under vector noise. However, its behavior under scalar noise remains less conclusive. Renowned for its efficacy in the analysis of complex systems under both equilibrium and non-equilibrium states, the eigen microstate method is employed here for a quantitative examination of the phase transitions in the Vicsek model under both vector and scalar noises. The study finds that the Vicsek model exhibits discontinuous phase transitions regardless of noise type. Furthermore, the dichotomy method is utilized to identify the critical points for these phase transitions. A significant finding is the observed increase in the critical point for discontinuous phase transitions with escalation of population density.

Key words: Vicsek model, phase transitions, eigen microstate method, noise

中图分类号:  (Phase transitions: general studies)

  • 05.70.Fh
87.80.-y (Biophysical techniques (research methods))