Light and Matter at the Quantum Limit

2 Research Areas

11 Research Units

26 Topical Groups

Light and Matter at the Quantum Limit

2 Research Areas

11 Research Units

26 Topical Groups


The research topics of our cluster are represented in the research areas A - Foundations of Metrology and B - Applications in Metrology.  The two research areas in turn consist of Research Units which form the cornerstones of QuantumFrontiers.  These pillars are connected via interdisciplinary Topical Groups to drive new scientific collaborations and activities.

Research Area A

Foundations of Metrology

Fundamental properties of light, matter and their interactions are studied here. The theoretical, conceptual and engineering foundations for applications in metrology and fundamental physics are laid in five research units.

Forschungsbereich B

Applications in Metrology

The application areas of Research Area B range from the nanoscale of single molecules to the truly macroscopic scale of gravitational wave detectors and are organized into a total of six research units.

Research Units are the thematically organized subject units that specialize in a topic or physical system.
Topical Groups connect Research Units to work efficiently on specific topics across institutions.


Quanten- and Nano-Engineering of Light

We study a range of systems from single-electron and single-photon sources, quantum dots, nanostructured mirror coatings, nanoLEDs, to spin squeezing resonators; these systems pave the way for subwavelength manipulation of light, metrology with single quanta and interferometry with strong non-classical correlations.

  • Twisted Light
  • Single Photons
  • Controlling Light at the Nanoscale
  • Quantum opto-mechanics
  • Non-classical photonic states
  • Laser Development

Quantum- and Nano-Engineering of Matter

We create quantum systems with novel functional features for future precision metrology and new technologies with metrological applications. For example, tailored quantum systems, such as non-classical states of matter and light, have been realised by us, opening new avenues towards entanglement-enhanced interferometry and interferometry below the standard quantum limit, which surpasses any classical measurement scheme.

  • Coupling of Atoms and Photons
  • Topological Systems
  • Many-body Quantum States and Transport
  • Quantum Electrical Standards
  • Non-Classical States of Matter
  • Atom Interferometry


Precision Measurements

QuantumFrontiers researchers are world leaders in the development of laser interferometric readout systems for terrestrial and space-based gravitational wave detectors, accurate optical clocks, satellite gravimetry, and quantum electrical standards. We use these expertise to carry out precision measurements that allow us to explore and potentially uncover new physics. 

  • Tests of Fundamental Physics
  • Backaction-Evading Techniques
  • Sub-standard Quantum Limit Interferometry
  • Relativistic Geodesy
  • Quantum Gravimetry and Inertial Sensing
  • Quantum Computation and Simulation

Enabling Technologies

QuantumFrontiers’ researchers have developed novel light sources, ion and neutral atom chip-scale traps, integrated photonics, and micro-fabrication technologies. We combine these expertise of our researchers to comprehensively and significantly advance the capabilities of quantum systems for applications in metrology. 

  • Regional TrapFab Facility
  • Optical Clock Networks
  • Quantum Sensors
  • Laser Gradiometers 
  • Electron Microscopy
  • Optical Simulations