What Does GEA Stand For?

GEA stands for Gradient Expansion Approxn In Exchange Energy Calcns

GEA, or Gradient Expansion Approximation in Exchange Energy Calculations, is a computational method used in density functional theory to approximate the exchange energy of many-electron systems. By expanding the exchange energy functional in terms of the density gradient, GEA provides a systematic approach for improving the accuracy of quantum mechanical calculations in condensed matter physics and materials science. This technique is particularly valuable for studying systems where traditional methods may struggle, enhancing predictions of electronic properties and behavior.