Pasterski–Strominger–Zhiboedov triangle

In theoretical physics, the Pasterski–Strominger–Zhiboedov (PSZ) triangle or infrared triangle is a series of relationships between three groups of concepts involving the theory of relativity, quantum field theory and quantum gravity.

The triangle highlights connections already known or demonstrated by its authors, Sabrina Gonzalez Pasterski, Andrew Strominger and Alexander Zhiboedov.

[1] The connections are among weak and lasting effects caused by the passage of gravitational or electromagnetic waves (memory effects), quantum field theorems on graviton and photon and geometrical symmetries of spacetime.

Because all of this occurs under conditions of low energy, known as infrared in the language of physicists, it is also referred to as the infrared triangle.

[2] The concepts that are interconnected by the triangle are: Each group is linked to another by special relationships: So, for example: In addition to the first triangular relationship highlighted by the authors, several others may exist and have been hypothesized.