New N-Operator Correlator Measures Quantum Information Spread

Researchers introduce N-Operator Correlators (NOC), a generalized Out-of-Time-Ordered Correlator using N-point correlation functions from cosmology. NOC incorporates more measurement probes than standard two-operator OTOC, reducing restricted analysis. They demonstrate the method on a single qubit in a longitudinal field and an XYZ two-qubit system at finite temperature. The work offers a basic introduction to generalized operator correlators in quantum mechanics.