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  1. Prof. Dr Mario Chemnitz (right) from the University of Jena and Mehmet Müftüoğlu are researching new approaches for secure quantum communication via fibre optics at Leibniz IPHT.
    Image: Stela Todorova/ Leibniz-IPHT
  2. A doctoral hat surrounded by European stars
    Illustration: Euraxess
  3. a working group is brainstorming
    Image: Wavebreak Media
  4. Prof. Dr Andreas Marx, President of the University of Jena (r.), and Igor Kästel, Regional Manager of AOK PLUS, at the signing of the cooperation agreement for a comprehensive health management.
    Image: Nicole Nerger (Universität Jena)
  5. AI Chat Bot
    Image: Adobe Stock
  6. Integrated optical circuit with fiber optic connections (top and bottom). The modulator signals are fed in via the gold electrodes on the sides.
    Image: Fraunhofer IOF
  7. Bust of Friedrich Schiller in fromt of yellow flowers
    Image: Anne Günther (University of Jena)
  8. Flag with the profile lines ‘Light. Life. Liberty.’ in front of the main building of the University of Jena.
    Image: Jens Meyer (University of Jena)
  9. Hand on a tablet
    Image: TKFDM
  10. Johannes Kretzschmer presenting Quantum Outreach at the 1st Quantum Photonics Fair in Erfurt 2025.
    Image: Karina Heßland-Wissel, Messe Erfurt GmbH
  11. Vclust enables the fast and reliable analysis and clustering of millions of viral genomes.
    Graphic: Juliane Seeber (Gemini generated)
  12. Schematic experimental setup: on the left, the photon source, which sends the polarisation-entangled signal-Idler photon pair into the measuring section. The signal photon hits the sample (front) and changes its polarisation state. The changed photon property is transferred by entanglement to the idler photon, whose property can now be determined by polarisation optics (quarter-wave plate QWP, linear polarizer LP). Before the measurement takes place, an long pass filter (LPF) is used to keep out interference signals.
    Illustration: Johannes Kretzschmar
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