Sternberg’s concept of the "moment map" (a way to encode symmetries in phase space) is being used to map bulk diffeomorphisms (general coordinate transformations) to boundary quantum operations. This is not the old group theory of isometries. This is dynamic, degenerate symplectic geometry where the group action is non-free —exactly the case Sternberg formalized.
by Shlomo Sternberg is a highly-regarded textbook originally published in 1994 that bridges the gap between abstract mathematical symmetry and physical laws. Based on his courses at Harvard University, Sternberg’s work is noted for its cohesive, well-motivated approach where mathematical theory and physical applications are developed simultaneously rather than in isolation. Key Focus Areas sternberg group theory and physics new
It provides a crystal-clear path for understanding how Hilbert spaces in quantum mechanics are actually just platforms for group actions. Who Is This For? Sternberg’s concept of the "moment map" (a way