Quantum Sensing
Quantum sensing enables the measurement of physical quantities with unparalleled sensitivity and precision exploiting the laws of quantum mechanics. A quantum sensor is generally thought of as a quantum system, typically represented as the ubiquitious two-level system, which is susceptible to the feeblest change in its electrostatic or magnetic environment, just to name a few. Quantum sensing leverages the absence of isolation in quantum systems, which is often seen as a limitation in other areas of quantum science and technology, and transforms it into a significant advantage.
This unique characteristic allows quantum sensors to probe and extract valuable information about the properties of the surrounding environment. A broader definition of quantum sensing also includes the use of quantum coherence or quantum properties such as entanglement to improve the result of a measurement beyond the limits set by classical physics.
Research on quantum sensing at ZQE mainly focusses on solid state implementation of quantum sensors. These include nanomechanical devices, superconducting circuits, and spin defects such as nitrogen-vacancy centers in diamond as well as other types of color center defects not only in conventional solids but also in two-dimensional materials.