Anonymous Quantum Sensing

A lot of attention has been paid to a quantum-sensing network for detecting magnetic fields in different positions. Recently, cryptographic quantum metrology was investigated where the information is transmitted secure way. However, sometimes, positions non-zero are generated could carry important information. Here, we propose an anonymous sensor having hidden after measuring with network. Suppose that agents located and they have sensors. After sensors entangled, implement sensing provides phase if exist, POVM measurement performed on Importantly, even outcomes stolen by eavesdropper, still unknown eavesdropper our protocol. In addition, evaluate sensitivity proposed using Fisher when there at most two fields. We show finite unless these (non-zero) exactly same amplitude. Our results pave way new applications