Entanglement and coherence in pure and doped Posner molecules

Area of Science:

• Quantum Biology
• Biophysics
• Quantum Chemistry

Background:

• Research in quantum biology often focuses on electron spin, but nuclear spin may be more biologically relevant due to lower decoherence.
• A hypothesis proposes that nuclear spin entanglement in Posner molecules could modulate neural activity via calcium ion production.

Purpose of the Study:

• To investigate the robustness of quantum coherence and entanglement within Posner molecules.
• To examine the influence of spin-spin coupling and molecular symmetry on these quantum effects.
• To explore how lithium isotope doping affects quantum resources and its potential link to bipolar disorder treatment.

Main Methods:

• Theoretical investigation of quantum effects (coherence, entanglement) in Posner molecules.
• Analysis of the dependence of quantum effects on parameters like spin-spin coupling and molecular symmetry.
• Simulation of lithium isotope doped Posner molecules to assess modulation of quantum resources.

Main Results:

• Quantum effects like coherence and entanglement in Posner molecules are sensitive to spin-spin coupling strengths and molecular symmetry.
• Lithium isotope doping differentially modulates quantum resources (coherence, entanglement) in Posner molecules.
• The study provides a potential quantum-based mechanism for lithium's therapeutic action in bipolar disorder.

Conclusions:

• Nuclear spin entanglement within Posner molecules is a plausible mechanism for biological quantum effects.
• Posner molecule structure and isotopic composition significantly influence quantum properties.
• Quantum entanglement preservation in biological environments may be achievable through specific molecular designs.