Sondenheimer Junior Group
Theory of optical quantum information (TOQI)
Spatial correlations of bitphoton states
Research areas
Simulation of resource states
Image: René SondenheimerProtocols for generating resource states
Quantum resource states such as Schrödinger cat states, entangled coherent states, and biphoton states are an integral part of various quantum technologies such as quantum computing, quantum metrology, quantum imaging, and quantum sensing. For example, cat states enable the precision measurement of physical quantities beyond classical limits in metrology, while they can be used for quantum error correction in quantum computing. Entangled coherent states, in which multiple light modes are entangled with each other, increase the sensitivity of measuring instruments by reducing the effects of quantum noise. These states are particularly useful because they enable the detection of previously invisible details and improve the detection of weak signals. In our working group, we are developing protocols for the efficient generation of such resource states and researching potential applications.
Schema Gaussian Boson Sampler
Image: René SondenheimerQuantum simulations
In the field of photonic quantum simulations, our group focuses specifically on Gaussian boson sampling. This method enables us to simulate complex quantum systems and investigate phenomena that cannot be analyzed efficiently with classical computers. It is based on the principle of quantum interference of photons. Our research aims to use Gaussian boson sampling to gain insights into quantum chemistry and complex optimization problems.
Quantum imaging
Quantum imaging based on “undetected photon schemes” is an innovative technique that can be used to generate images of photons that have not interacted with the object. This technique uses correlated photon pairs, in which only one of the two photons interacts with the object being examined. The other photon, which has not interacted with the object, is measured instead. Due to the correlation between the two photons, information about the object can be obtained from the measurements of the undetected photon. This makes it possible to obtain information about the object that would not be accessible with traditional imaging methods, such as the structure of light-sensitive materials or biological samples, without damaging them.
René Sondenheimer, Dr
Junior group leader
Institut für Festkörpertheorie und -optik
Team members
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Donkersloot, Emil Kaspar Frederik PhD Student Institut für Festkörpertheorie und -optik
Room D201D
Helmholtzweg 5
07743 Jena
Image: Emil Donkersloot -
Ellenberg, Hendrik PhD Student Institut für Festkörpertheorie und -optik
Room D201D
Helmholtzweg 5
07743 Jena
Image: Hendrik Ellenberg -
Heinzel, Philip PhD Student Institut für Festkörpertheorie und -optik
Room D201D
Helmholtzweg 5
07743 Jena
Image: Philip Heinzel -
Seeliger, Alexander PhD Student Institut für Festkörpertheorie und -optik
Room D201D
Helmholtzweg 5
07743 Jena -
Schiffhorst, Laura Master Student Institut für Festkörpertheorie und -optik
Room D201D
Helmholtzweg 5
07743 Jena
Associated team members
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Zimmermann, Gil Otto PhD Student Experimental Quantum Information
IOF, Room 2B1.04
Albert-Einstein-Straße 7
07745 Jena
Image: Gil Zimmermann