Measure in circles

Entanglement can provide an extra boost in precision, but entangled states are hard to detect. A recent experiment solves this problem by letting the entangling dynamics come full circle - or not, depending on the subtle perturbation to be sensed.

Automated summary

Entangled states are difficult to detect but can enhance precision. A recent experiment addresses this issue by allowing the entangling dynamics to either complete a full circle or not, depending on the subtle perturbation being sensed.