Strengthening weak measurements of qubit out-of-time-order correlators
Strengthening weak measurements of qubit out-of-time-order correlators
For systems of controllable qubits, we provide a method for experimentally obtaining a useful class of multitime correlators using sequential generalized measurements of arbitrary strength. Specifically, if a correlator can be expressed as an average of nested (anti)commutators of operators that square to the identity, then that correlator can be …