Inductive Superconducting Quantum Interference Proximity Transistor: The L-SQUIPT

The design for an inductive superconducting quantum interference proximity transistor with enhanced performance, the L-SQUIPT, is presented and analyzed. interferometer based on a double-loop structure, where each ring comprises superconductor-normal metal-superconductor mesoscopic Josephson weak-link read-out electrode implemented in form of tunnel probe. Our allows both to improve coupling external magnetic field increase characteristic flux transfer functions, thereby leading improved ultrasensitive limited magnetometer. L-SQUIPT behavior analyzed dissipative dissipationless Josephson-like operation modes, or mode latter case by exploiting dispersive readout scheme. performance makes promising detection as well specific applications technology, responsive magnetometry at milliKelvin temperatures required.