Qubits as Sensors

Several mega-trends of our age promise to shift the boundary of what we can measure and image. The building blocks of the quantum computer - single atoms, single molecules, single spins - can be used as novel sensors. They are the smallest measurement devices that have ever been built, and have enabled breakthrough results such as measuring the magnetic field of a single biomolecule. At the same time, modern signal processing and artificial intelligence can increasingly make sense of even weak and noisy signals like single photons.

Pushing this development is the mission of our group. We in particular aim to generate new methods for the life sciences.



First publication


The first paper produced in the new lab is out! We present a simple scheme to calibrate quantum control pulses, which is useful for many applications, especially for experiments on NV centers in diamond. You can learn more about it in AIP Advances 13, 035226 (2023)

Zeiss Quantum Challenge Award


A proposal of our group has won the quantum challenge of the optics company Zeiss. We propose to shrink a magnetic resonance imaging scanner to the size of a single biological cell, using NV centers in diamond as a microscale detector. The Quantum Challenge recognizes realistic and promising proposals for near-term applications of quantum technology. The award will also help to attract funding to pursue this project at the University of Rostock. Thanks to Zeiss for supporting our work in this way!
You can read more about it in the Zeiss press release


A new scheme speeds up readout of diamond qubits by a factor of 1000


We have developed a new scheme to read out NV centers. It is much faster than what has been possible before - up to a factor of 1000 in some applications. The key trick is to employ the NV center itself as a single-atom flash memory. Using a resonant spin-charge conversion protocol at cryogenic temperature, we write the spin state of the NV center into this memory, where it can be read out very efficiently by fluorescence. 
Nature Communications 12, 532 (2021)


Towards label-free microscopy of action potentials


Imaging of action potentials by sensitive detection of intrinsic signals like tiny movements is an emerging neuroscience technique. We have studied various algorithms of signal processing that can enhance detection of these signals. 
Scientific Reports 10, 20078 (2020)



Prof. Dr. Friedemann Reinhard
Institut für Physik,
Forschungsgebäude, Raum 116
Tel.: +49 381 498 6840
E-Mail: friedemann.reinhard(at)uni-rostock.de

Ulrike Schröder
Institut für Physik,
Forschungsgebäude, Raum 179
Tel.: + 49 381 498 6861
Fax: + 49 381 498 6862
E-Mail: ulrike.schroeder(at)uni-rostock.de