This research introduces the Measurement Invasiveness Quantifier (MIQ) to characterize the disturbance caused by quantum measurements on many-body quantum correlations. The MIQ combines entanglement entropy dynamics, quantum mutual information degradation, and Leggett-Garg inequality violations to provide a comprehensive metric. The study distinguishes between weak and strong measurement regimes, identifies critical thresholds for measurement-induced phase transitions, and proposes experimental protocols for implementation.
Key findings
Introduces the Measurement Invasiveness Quantifier (MIQ) as a metric for disturbance in quantum systems.
Develops a protocol to distinguish weak and strong measurement regimes.
Identifies critical thresholds for measurement-induced phase transitions.
Proposes experimental protocols for implementation in cold-atom systems and superconducting quantum processors.
Limitations & open questions
The framework's applicability to other types of quantum systems beyond the ones studied is not yet established.
The experimental validation is proposed but not yet demonstrated.