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This research aims to redefine the cosmological constant as a dynamic field that evolves over time, potentially leading to a Big Crunch.

June 3, 2026Open Access

A Dynamic Cosmological Parameter: From the Vacuum Energy Floor to the Big Crunch via Time Reversal

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Randomized trial explores evolving cosmological constant effects in cosmos, indicating potential cyclic universe framework.

This research aims to redefine the cosmological constant as a dynamic field that evolves over time, potentially leading to a Big Crunch.
Developed a covariant scalar-field formulation of Λ(t)
Derived modified Friedmann equations related to the evolving cosmological constant
Identified observational signatures consistent with current Type Ia supernova and CMB data.
Demonstrated that as Λ(t) approaches its critical value, the universe's acceleration reverses, suggesting a cyclic nature.
Provided findings consistent with observational data from Type Ia supernovae and Cosmic Microwave Background measurements.

kritagya Joshi (2026) studied this question.

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