What question did this study set out to answer?

To propose a new hypothesis for the smallness of the cosmological constant and its gravitational effects through a dynamical screening mechanism.

January 18, 2026Open Access

Elastic Membrane Cosmology 10.5 Superfluid Vacuum Dynamics, Spacetime Impenetrability, and the Hydrodynamic Unification of the Dark Sector

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To propose a new hypothesis for the smallness of the cosmological constant and its gravitational effects through a dynamical screening mechanism.
Introduced the concept of Einstein-Chien Pressure as an environmental variable.
Conducted theoretical analysis to predict effects on large-scale structures and dark energy behavior.
Identified key observational consequences to test the hypothesis against standard cosmological models.
Predicted strong dynamical effects on the Hubble flow caused by large-scale underdensities.
Established a small but nonzero redshift dependence for the effective dark energy equation of state at z < 1.
Suggested that initial conditions for structure formation could differ from standard inflationary models.

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Phenomenological hypothesis reveals dynamical screening of vacuum energy effects, suggesting new insights on dark energy dynamics in cosmology.

Hung-Hsiang Chien (2026) studied this question.

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Phenomenological hypothesis reveals dynamical screening of vacuum energy effects, suggesting new insights on dark energy dynamics in cosmology.