Geometric Design Principles for Quantum Coherence Across Material Classes

Preprint (submitted to Physical Review Research, November 2025).

This work synthesizes five independent experimental breakthroughs published between 2024 and 2025 — in kagome metals (Nature 2025), subwavelength photonic arrays (Phys. Rev. Lett. 2025), aromatic porphyrin nanobelts (ChemRxiv/Science under review 2025), nanoconfined water (Nature 2025), and tryptophan mega-networks in biological microtubules (J. Phys. Chem. B 2024) — revealing a universal geometric origin for protected quantum coherence across electronic, photonic, excitonic, protonic, and biological platforms.

Three material-agnostic principles are identified: (i) scale matching of structural spacing to the relevant quantum length, (ii) pattern control of interference via symmetry/helicity/frustration, and (iii) boundary-imposed state selection. These enable collective enhancements ranging from 15× (electronic transport) to theoretically 10⁵–10⁶ (biological superradiance) at temperatures up to 310 K. A quantitative comparison and explicit four-step design workflow are provided for engineering ambient quantum materials.

The framework offers testable predictions for room-temperature quantum technologies and suggests geometric roles in conserved biological architectures (see Supplemental Material).