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The role of quantum-mechanical effects in biological processes has captivated researchers for decades. Emerging evidence suggests that weak magnetic fields can significantly impact biological systems, thereby offering a promising avenue for exploring these quantum phenomena. Here, we discuss a possible explanation for these events based on the radical pair process, which includes the quantum dynamics of nuclear and electron spins in transient radical molecules. Biological processes such as avian magnetoreceptionAvian magnetoreception and planaria regenerationPlanaria regeneration are analyzed in this chapter to examine the role of quantum effects in these scenarios. We discuss possible candidate molecules implicated in the weak magnetic field effectsWeak magnetic field effects and investigate how the radical pair mechanismRadical Pair Mechanism (RPM) acts as a unifying model for them. We also address the impact of CISS (Chirality-Induced Spin SelectivityChirality-Induced Spin Selectivity (CISS)) in these processes. We conclude that the radical pair mechanismRadical Pair Mechanism (RPM), along with CISSChirality-Induced Spin Selectivity (CISS), offers an explanation for weak magnetic field effectsWeak magnetic field effects in these biological processes.

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How Migratory Birds Navigate and Planaria Regenerate: Potential Role of Quantum Mechanics

  • 会议论文

  • 发表日期：

    2025年

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  • Ashutosh Tripathi,
  • Parul Raghuvanshi,
  • Vishvendra Singh Poonia

摘要

The role of quantum-mechanical effects in biological processes has captivated researchers for decades. Emerging evidence suggests that weak magnetic fields can significantly impact biological systems, thereby offering a promising avenue for exploring these quantum phenomena. Here, we discuss a possible explanation for these events based on the radical pair process, which includes the quantum dynamics of nuclear and electron spins in transient radical molecules. Biological processes such as avian magnetoreceptionAvian magnetoreception and planaria regenerationPlanaria regeneration are analyzed in this chapter to examine the role of quantum effects in these scenarios. We discuss possible candidate molecules implicated in the weak magnetic field effectsWeak magnetic field effects and investigate how the radical pair mechanismRadical Pair Mechanism (RPM) acts as a unifying model for them. We also address the impact of CISS (Chirality-Induced Spin SelectivityChirality-Induced Spin Selectivity (CISS)) in these processes. We conclude that the radical pair mechanismRadical Pair Mechanism (RPM), along with CISSChirality-Induced Spin Selectivity (CISS), offers an explanation for weak magnetic field effectsWeak magnetic field effects in these biological processes.