2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/16258We explore the equations of state and other properties of various quantum fluids (3He, 4He, their mixtures, and H_2) confined within individual carbon nanotubes. Above a threshold number of particles, N_a, the fluid density near the axis begins to grow above a negligibly small value. The properties of this axial fluid phase are sensitive to the tube size and hence to the transverse compression in the case of a bundle of nanotubes. We consider He at zero temperature and H_2 at low temperatures.19 pages, 17 figures, submitted to J. Low Temp. PhysStatistical Mechanicstext