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What is Quasi-Particle Lifetime in 2D Electrons about?

This document summarizes a journal article about calculating the lifetime of quasi-particles in a 2-dimensional electron gas. It discusses how the random phase approximation (RPA) is not adequate to calculate the effect of Coulomb interaction on lifetimes. The finite-temperature generalized Ward-Takahashi relations provide an exact relationship between the proper self-energy and vertex function. However, the RPA vertex function makes the imaginary part of the self-energy vanish, failing to capture the Coulo

Author

Shivam Verma

Language

EN