  Polaritons are arousing tremendous interests in physics and material sciences
for their unique and amazing properties, especially including the condensation,
lasing without inversion and even room-temperature superfluidity. Herein, we
propose a cell vibron polariton (cell-VP): a collectively coherent mode of a
photon and all phospholipid molecules in a myelin sheath which is a nervous
cell majorly consisting of the phospholipid molecules. Cell-VP can be
resonantly self-confined in the myelin sheath under physiological conditions.
The observations benefit from the specifically compact, ordered and polar
thin-film structure of the sheath, and the relatively strong coupling of the
mid-infrared photon with the vibrons of phospholipid tails in the myelin. The
underlying physics is revealed to be the collectively coherent superposition of
the photon and vibrons, the polariton induced significant enhancement of myelin
permittivity, and the resonance of the polariton with the sheath cell. The
captured cell-VPs in myelin sheaths may provide a promising way for
super-efficient consumption of extra-weak bioenergy and even directly serve for
quantum information in the nervous system. These findings further the
understanding of neuroscience on the cellular level from the view of quantum
mechanics.
