Semiclassics

Type: Concept

As of November 2026, Semiclassics has been mentioned in one podcast episode on Simons Foundation (Jan 2026). In the episode "Mithat Unsal: Self-Dual Monopole Loops, Instantons and Confinement" on Simons Foundation, semiclassics is discussed as a reliable framework for analyzing instantons and their contributions to gauge theories. The speaker emphasizes that semiclassical expansion is a methodical approach, reinforcing its significance in the context of instantons.

In physics, the semiclassical approximation divides a system into two parts, one to be described quantum-mechanically, and the other to be treated classically. In general, it incorporates a series expansion in powers of the Planck constant, resulting in classical physics in the power of 0, and the first nontrivial approximation to the power of (−1). In this case, there is a clear link between the quantum-mechanical system and the associated semiclassical and classical approximations, as it is si