fázison

Fázison is a fictional concept used in speculative physics and science fiction to denote a hypothetical elementary excitation or quasiparticle associated with phase coherence in a material system. The term is not established in peer-reviewed physics and there is no experimental confirmation of its existence.

In the imagined framework, fázison would arise as a collective excitation of an order-parameter field, akin to a bosonic quasiparticle that carries phase information between regions of a sample. It is typically described as having a low effective mass and a linear or weakly dispersive energy-momentum relation at small wave vectors. Its interactions would couple it to other excitations such as phonons or magnons and to external controls like temperature, pressure, or magnetic field.

Potential roles include mediating long-range phase coherence across a system, influencing the dynamics of phase transitions, and enabling unconventional transport phenomena tied to phase, rather than energy, transfer. Because it is not experimentally observed, its proposed properties are model-dependent and vary across speculative treatments.

In discussions, fázison is sometimes used to illustrate concepts related to order-parameter dynamics, topological defects, and phason-like modes in non-crystalline or modulated structures. The term should be distinguished from real concepts such as phasons in quasicrystals, which have some experimental and theoretical grounding. As a result, fázison remains a theoretical and fictional construct rather than an established physical entity.