Likviidsusastmetesse

Likviidsusastmetesse is a speculative framework used to describe transitions among multiple liquid-like metastable states within a single substance. In this viewpoint, a liquid can occupy distinct basins in its configuration space—such as low-density and high-density liquid states or other metastable liquid forms—and switch between them under changes in thermodynamic conditions or composition. The term is not part of a standardized physics vocabulary and appears mainly in interdisciplinary discussions.

Origin and usage: The construction resembles Estonian-language derivations, combining likviidsus (liquidity) and astmetesse (into states). It is considered a neologism and is rarely employed in formal literature, where terms like polyamorphism or liquid–liquid phase transitions are preferred.

Theoretical basis: The theoretical basis draws on energy landscape concepts and order-parameter analyses. Likviidsusastmetesse formalizes the idea that liquids can reside in multiple metastable basins separated by kinetic barriers, with phase-transition pathways influenced by pressure, temperature, and composition. It overlaps with, but is distinct from, established notions of polyamorphism and LLPT.

Experimental and computational approaches: Empirical investigation relies on calorimetry, X-ray and neutron scattering, spectroscopy, and computer simulations. Signatures might include multiple amorphous or liquid basins, changes in density or structure factor, heat-capacity anomalies, and anomalous diffusion or relaxation dynamics near transition conditions.

Significance and reception: If validated, the concept could help unify observations of multiple liquid-like states in water, silicon, polymers, and complex fluids. Critics note the lack of unambiguous evidence and warn that some observations may be attributed to polyamorphism, crystallization tendencies, or slow kinetics rather than true multiple liquid states.

See also: polyamorphism, liquid–liquid phase transition, glass transition, metastable states, energy landscape.