No-go theorems are theoretical results in various fields of science and mathematics that demonstrate the impossibility of achieving certain objectives under specified conditions. These theorems often highlight limitations or constraints in theories, models, or physical systems, showing that a desired outcome cannot be realized.
Haag's theorem is a result in quantum field theory that addresses the challenges of interacting quantum field theories. It was formulated by Res Jost and, independently, by Res Jost and Lothar Haag in the 1950s. The theorem shows that the interaction picture, commonly used to describe dynamical processes in quantum field theory, is not well-defined for interacting quantum fields.
The Kochen-Specker theorem is a fundamental result in the field of quantum mechanics and the foundations of quantum theory. It addresses the question of hidden variables and challenges the notion that the outcomes of quantum measurements can be explained by pre-existing properties of particles.
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