Krylov Complexity in Quantum Field Theory

RWTH Publications (RWTH Aachen)

Abstract

In this paper, we study the Krylov complexity in quantum field theory and make a connection with the holographic "Complexity equals Volume" conjecture. When Krylov basis matches with Fock basis, for several interesting settings, we observe that the Krylov complexity equals the average particle number showing that complexity scales with volume. Using similar formalism, we compute the Krylov complexity for free scalar field theory and find surprising similarities with holography. We also extend this framework for field theory where an inverted oscillator appears naturally and explore its chaotic behavior.

Authors 3

1. Kiran Adhikari Aachen

   RWTH Aachen University

   Affiliation as printed

   RWTH Aachen University , D-52056 , Aachen , Germany,

2. Sayantan Choudhury
3. Abhishek Roy