👉 The z-fluid, also known as the z-matrix fluid or the z-plane fluid, is a theoretical construct in quantum field theory and condensed matter physics that represents a simplified model of the vacuum state or ground state of a system. It is particularly useful in describing systems where the complexity of the full quantum field theory is too high to analyze directly. The z-fluid posits that the vacuum state has a well-defined charge density and current, which can be used to describe phenomena like the chiral anomaly and the behavior of quarks and leptons in quantum chromodynamics (QCD). This model simplifies calculations by focusing on the collective behavior of particles in terms of a fluid-like medium, making it easier to understand and predict certain physical properties and interactions.
