Introduction to Out of Time Order Correlators (OTOCs)(2025)
Summary
The article introduces Out of Time Order Correlators (OTOCs) as observables that help study chaos in quantum dynamics and discusses how the Quantum Echoes algorithm measures them. It highlights verifiability of quantum expectation values, the forward-backward evolution scheme, and potential practical uses such as Hamiltonian learning and NMR-like molecular analysis, illustrating beyond-classical advantages of quantum computation.