Emmy Noether Junior Research Group Quantum Critical Matter

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Group leader

Name

Dr. Lukas Janssen

Emmy Noether Junior Research Group Quantum Critical Matter

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Institut für Theoretische Physik

Institut für Theoretische Physik

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BZW, Room A141 Zellescher Weg 17

01069 Dresden

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+49 351 463-37185

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We investigate a variety of strongly-correlated systems from the common viewpoint of quantum criticality. This includes models for frustrated magnets and interacting semimetals, as well as quantum critical systems that are described by emergent gauge field theories. What are the characteristic excitations? What are the relevant interactions? What is the nature of the QCP and its adjacent phases? How can a material be tuned through a QCP into a regime that stabilizes a novel quantum phase?

Methodologically and conceptually we benefit from recent synergistic developments in condensed matter, high-energy, and statistical physics, as well as quantum information theory, and we intend to also further advance these emergent bridges between different fields.

Our group is part of the Cluster of Excellence ct.qmat and the Collaborative Research Center SFB1143.

News

• 02/2025: Research Highlight: Article on Higher-rank spin liquids and spin nematics published as "PRB Editors' Suggestion"
• 02/2025: Research Highlight: Article on entanglement entropy of deconfined quantum critical points published in Sci. Adv.
• 01/2025: Research Highlight: Article on Nordic-Walking mechanism published in Nat. Commun.
• 05/2024: Congratulations to Jan Biedermann on a successful BSc thesis!
• 04/2024: Lecture Quantum Phase Transitions: Video recordings available via  videocampus.sachsen.de
• 03/2024: New BSc student: Jan Biedermann
• 12/2023: Congratulations to Max Fornoville on a successful MSc thesis!
• 10/2023: Research Highlight: Article on triple-q order in Na₂Co₂TeO₆ published in Phys. Rev. Lett. (summary)
• 09/2023: New Postdoc: Dr. Zihong Liu
• 03/2023: New PhD student: Niccolò Francini
• 11/2022: PhD / Postdoc position available
• 10/2022: New MSc student: Max Fornoville
• 04/2022: Research Highlight: Article on nematic quantum criticality published in Phys. Rev. Lett. (summary)
• 03/2022: Congratulations to Shouryya Ray on a successful PhD thesis!
• 02/2022: Research Highlight: Article on metallic and deconfined quantum criticality published as "PRL Editors' Suggestion" (summary)
• 10/2021: Lecture Electrodynamics for Teachers in hybrid format: Video available recordings available via videocampus.sachsen.de
• 05/2021: Research Highlight: Article on field-induced intermediate phase in α-RuCl₃ published as "PRB Editors' Suggestion"
• 05/2021: New PhD student: David Moser
• 12/2020: Research Highlight: Article on fractionalized quantum criticality published in Phys. Rev. Lett. (summary)
• 11/2020: PhD / Postdoc position available
• 09/2020: Research Showcase: Exhibition at Technische Sammlungen, Dresden
• 08/2020: Lukas Janssen TUD Young Investigator
• 03/2020: Image video "Würzburg-Dresden Cluster of Excellence ct.qmat"
• 12/2019: New PhD student: Wilhelm Krüger
• 08/2019: Press release: Where Quantum Events Matter