Ultrasensitive, Parity-Time-Symmetric Wireless Reactive and Resistive Sensors

We propose a new readout paradigm for enhancing the performance of wireless resistive and reactive sensors. Here, we consider a passive resistor-inductor-capacitor sensor that is inductively coupled to an active reader, with the equivalent circuit of the whole telemetry system obeying the space-time reflection symmetry or the parity-time (PT) symmetry. As inspired by PT-symmetric quantum systems, ...