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Casimir effect with dielectric matter in salted water and implications at the cell scale
Larissa Inácio, Felipe S. S. Rosa, Astrid Lambrecht, Paulo A. Maia Neto, Serge Reynaud·January 13, 2026
Quantum PhysicsMesoscale Physicsphysics.chem-phphysics.optics
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Abstract
The Casimir interaction in salted water contains a universal contribution of electromagnetic fluctuations that makes it of a longer range than previously thought. The universal contribution dominates non universal ones at the distances relevant for actin fibers inside the cell. We discuss universal and non-universal contributions with a model mimicking biological matter. We also show that the universal Casimir effect should have important implications at the cell scale.