Welcome to ct.qmat

We are the Cluster of Excellence ct.qmat – Complexity and Topology in Quantum Matter. Established in 2019, the Würzburg-Dresden Cluster ct.qmat is a leading international center for research on topological and complex quantum matter. Our aim is to develop a deep understanding of quantum phenomena in general and to identify materials in which those phenomena are observed in the laboratory. This is supported by educating and attracting top-level students and scientists as well as by supplementing infrastructure in both Würzburg and Dresden.

ct.qmat in a Nutshell


ct.qmat unites two of the leading research hubs in condensed matter physics: Dresden and Würzburg.


Powerful Network for Cutting-Edge Research. ct.qmat’s Würzburg spokesperson Claessen highlights its remarkable achievements:


"At the heart of our research are complexity and topology, two exciting key areas in modern condensed matter physics. We’ve developed quantum materials with unprecedented features, such as manganese bismuth telluride. Our team has made significant strides in superconductivity, topological insulators, and topological lasers. From two universities and our external partners, a network has grown that’s truly greater than the sum of its parts."


Continuing the Quantum Revolution. ct.qmat is leading the way, says its Dresden spokesperson Matthias Vojta:


"We’re leading the field with our discoveries. Developing a wide variety of materials using state-of-the-art synthesis techniques, we’ve firmly established Würzburg and Dresden as Germany’s premier centers of topological materials physics. We’re driven by curiosity and a commitment to systematically understanding topological ct.qmat in a Nutshell physics. We also reach out to the public, including by launching an escape room for kids in 2024. That’s something we’re really passionate about!"



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    2327 Sep 2024

    CT.QMAT24: International Conference on Complexity and Topology in Quantum Matter

    CT.QMAT24 is the second international conference of the Cluster of Excellence ct.qmat on emerging quantum phenomena resulting from topological physics and its interplay with many-body interactions in diverse quantum matter settings, from topological electron materials to quantum spin systems and photonics. It will be taking place in the city of Dresden, Germany.


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    16 May 2024

    Method Milestone for Quantum Physics: Rapid Test for Topological 2D Materials

    Topological quantum materials are hailed as a cornerstone of future technological advancements. Yet, validating their exceptional qualities has always been a lengthy business. However, researchers at the Cluster of Excellence ct.qmat have now developed an experimental technique that systematically identifies two-dimensional topological materials through a rapid test.

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    25 Apr 2024
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    Kitty Q – A Quantum Adventure: Germany’s First Quantum Physics Escape Room for Children Opens in Dresden

    +++ Cluster of Excellence ct.qmat unveils Germany’s first quantum physics-themed escape room for youngsters in Dresden +++ Kitty Q – A Quantum Adventure at Technische Sammlungen Dresden offers a gamified exploration of quantum physics +++ Michael Kretschmer, Prime Minister of the Free State of Saxony, has agreed to act as patron +++

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    18 Apr 2024

    Quantum entanglement in quasiparticles: a stealth mode against disorder

    Würzburg physicists of the Cluster of Excellence ct.qmat have discovered that quantum entanglement toughens up quasiparticles against impurity scattering – even when they are subject to strong disorder.

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    10 Apr 2024

    “A Wonderful Start” – ct.qmat Launches German-Japanese Research Partnership in Quantum Technologies

    The Würzburg-Dresden Cluster of Excellence ct.qmat hosted a German-Japanese workshop on February 26 and 27, 2024, setting the course for close collaboration between researchers from both countries. Around 70 participants from Germany and Japan convened in Würzburg to discuss their latest findings in quantum physics research. Organized by ct.qmat and supported by the Japan Science and Technology Agency (JST), the workshop delved into areas such as topology, photonics, magnetism, and the dynamics of electron correlation in solids. This exchange of ideas paved the way for joint projects in the coming years.

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    21 Mar 2024

    A Celebration of Achievement: Cluster of Excellence ct.qmat Marks Its 1000th Publication

    The Würzburg-Dresden Cluster of Excellence ct.qmat has recently celebrated a significant achievement with its 1000th publication. To mark this achievement, the authors will receive a trophy at the Cluster Retreat in Weimar at the end of March 2024.

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    07 Mar 2024

    Cold Chips and Quantum Mysteries: Preview the Kitty Q Escape Room at SPIN2030

    Dive into the world of quantum physics with Kitty Q, the cute, half-dead cat who adores cold chips and quantum puzzles. This freaky feline is the main character and namesake of the first quantum physics-themed escape room in Germany for youngsters, currently being set up at the Dresden Museum of Science and Technology in partnership with the Dresden-Würzburg Cluster of Excellence ct.qmat. Join us for an exclusive sneak peek at the SPIN2030 Science Festival in Dresden on March 8 and 9, 2024, and be among the first to try out the cold chips puzzle table from the quantum kitchen.

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    01 Mar 2024

    Umbrella for Atoms: The First Protective Layer for 2D Quantum Materials

    In a groundbreaking development, researchers at the Würzburg-Dresden Cluster of Excellence ct.qmat have engineered a protective film that shields quantum semiconductor layers just one atom thick from environmental influences without compromising their revolutionary quantum properties. This puts the application of these delicate atomic layers in ultrathin electronic components within realistic reach. The findings have just been published in Nature Communications.

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    08 Feb 2024

    A superconducting sandwich offers hope for Majorana qubits

    Dresden physicists discover the source of unique surface superconductivity, published in the journal Nature.

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    08 Feb 2024

    Kitty Q Celebrates: Quantum Physics Game App Exceeds 500,000 Downloads

    The cute, half-dead cat Kitty Q is proving to be a global sensation, boasting over 500,000 downloads. The game app Kitty Q – A Quantum Adventure, starring the charming feline, demonstrates the appeal of quantum physics to children and teenagers. The gamification initiative is set to continue in 2024 with the launch of Germany’s first-ever quantum physics escape room for kids.

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