Quantum Sensing
Project 1:
Quantum mechanics provides various ways for improving the sensitivity and resolution of sensors, beyond the levels achievable with purely classical effects. We work towards tapping that potential in practical applications.
Project leaders: Martino Poggio, Christoph Bruder
Members: Christoph Bruder, Christian Degen, Anna Fontcuberta i Morral, Tobias Kippenberg, Patrick Maletinsky, Lukas Novotny, Martino Poggio, Philipp Treutlein, Stefan Willitsch
Quantum systems can interact with their environments in ways that are fundamentally distinct from the behaviour of classical systems. As a consequence, sensors based on quantum systems provide unique opportunities in terms of sensitivity and precision, not least with a view to enabling non-invasive measurements. These advantages can be exploited to measure physical quantities such as magnetic and electric fields, time and frequency, force and displacement, or temperature.
In this project, we develop and implement quantum-enhanced sensors, explore applications and integrate quantum sensors into practical devices. Based on a fundamental understanding of the foundations of quantum measurement, we develop concepts and architectures in which quantum protocols have clear advantages over their classical counterparts. These quantum sensors are then employed for measurements that either provide new fundamental insight or surpass existing limits in sensitivity and precision. These sensors are finally incorporated into devices that are engineered to preserve the quantum nature of the system and can be integrated into commercial platforms.
Achieving these goals requires the application of quantum physics to the problem of ultra-sensitive measurement. As in the first two phases of NCCR QSIT, we bring together a range of experimental systems, including cold atoms, trapped ions, single spins in solid-state systems, nano- and micro-mechanical oscillators, and quantum states of light. Ultimately, we strive to pave a path towards quantum sensors that enable, in practically relevant scenarios, the determination of physical quantities with a resolution that is ideally limited only by fundamental, quantum-mechanical constraints.