“…Largely, the motivation for this development has been rooted in quantum information processing, where efficient and precise measurements and state manipulation is required [12], and indeed significant progress towards the implementation of quantum gates and algorithms has been made in optical setups [13,14], NV centers in diamond [15,16], trapped ions [17,18] and superconducting circuits [19,20]. Since it employs similar control and measurement techniques as quantum computing, the exploration of quantum-enhancing techniques has grown as a separate field, usually referred to as quantum metrology [21,22], with applications such as ultrasensitive force detection [23], adaptive environment sensing [24], near-surface electric field measurements [25], sensing of weak signals [26] and even detection of gravitational waves [27].…”