Topological Systems

Topological Systems

Investigations of topological concepts in condensed matter systems. Creation, detection and manipulation of topologically protected excitations.


  • Offer workshops with external guests (improve visibility)
  • Offer a lecture series as a crash course into the topic (for PhDs especially)
  • Co-teach "Spezialvorlesungen" e.g. "Topological Systems and Quantum Computing"

Scientific Output

  • Publications

    Osborne TJ, Stottmeister A. Conformal Field Theory from Lattice Fermions. Communications in Mathematical Physics. 2023 Feb;398(1):219-289.


    Denisova K, Lemmens P, Wulferding D, Berdonosov P, Dolgikh V, Murtazoev A et al. Cu9O2(SeO3)4Cl6 revisited: Crystal structure, Raman scattering and first-principles calculations. Journal of alloys and compounds. 2022 Feb 15;894. 162291.

    Jamadagni A, Weimer H. Operational definition of topological order. Physical Review B. 2022 Aug 31;106(8). 085143.


    Probst B, Virtanen P, Recher P. Sub- to Super-Poissonian crossover of current noise in helical edge states coupled to a spin impurity in a magnetic field. Physical Review B. 2022 Aug 4;106(8). 085406.

    Belke C, Locmelis S, Thole L, Schmidt H, Behrens P, Haug RJ. Thickness-dependent gap energies in thin layers of Hf Te5. 2D Materials. 2021 Jul;8(3). 035029.

    Beule CD, Dominguez F, Recher P. Network model and four-terminal transport in minimally twisted bilayer graphene. 2021 Jul 10.

    Bockhorn L, Rode JC, Gnörich L, Zuo P, Brechtken B, Haug RJ. Interlayer configurations of self-assembled folded graphene. Applied physics letters. 2021 Apr 26;118(17). 173101.

    Büscher F, Müllner S, Wulferding D, Pashkevich YG, Gnezdilov V, Peshkov AA et al. Raman scattering of plane-wave and twisted light off chiral molecular liquids. Low temperature physics. 2021 Nov 1;47(11):959-965.

    De Beule C, Dominguez F, Recher P. Effective Floquet model for minimally twisted bilayer graphene. Physical Review B. 2021 May 21;103(19). 195432.

    Fernández Scarioni A, Barton C, Corte-León H, Sievers S, Hu X, Ajejas F et al. Thermoelectric Signature of Individual Skyrmions. Physical review letters. 2021 Feb 16;126(7). 077202.

    Glamazda A, Sharafeev A, Bohle R, Lemmens P, Choi KY, Chou FC et al. Легування від CDW до топологічної надпровідності: роль дефектів у розсіюванні фононів у нецентросиметричному PbxTaSe2. Fizika Nizkikh Temperatur. 2021 Nov;47(11):994-1002.

    Gnezdilov V, Kurnosov V, Pashkevich Y, Bera AK, Islam ATMN, Lake B et al. Non-Abelian statistics in light-scattering processes across interacting Haldane chains. Physical Review B. 2021 Oct 15;104(16). 165118.

    Hong SJ, Xiao X, Wulferding D, Belke C, Lemmens P, Haug RJ. Strain-induced doping and zero line mode at the fold of twisted Bernal-stacked bilayer graphene. 2D Materials. 2021 Oct 18;8(4). 045009.

    Ksenofontov V, Pashkevich YG, Panthöfer M, Gnezdilov V, Babkin R, Klauer R et al. FeMoO4 revisited: Crosslike 90° noncollinear antiferromagnetic structure caused by dzyaloshinskii-moriya interaction. Journal of Physical Chemistry C. 2021 Mar 18;125(10):5947-5956.

    Madsen KA, Brouwer PW, Recher P, Silvestrov PG. Interference effects induced by a precessing easy-plane magnet coupled to a helical edge state. Physical Review B. 2021 Mar 24;103(11). 115142.

    Osborne TJ, Stottmeister A. Quantum Simulation of Conformal Field Theory. 2021 Sep 29.

    Prikhodko OO, Bidasyuk YM. Projected gross–pitaevskii equation for ring-shaped bose–einstein condensates. Ukrainian Journal of Physics. 2021;66(3):198-205.

    Vanhove R, Lootens L, Damme MV, Wolf R, Osborne T, Haegeman J et al. A critical lattice model for a Haagerup conformal field theory. 2021 Oct 7.

    Budker D, Crespo López-Urrutia JR, Derevianko A, Flambaum VV, Krasny MW, Petrenko A et al. Atomic Physics Studies at the Gamma Factory at CERN. Annalen der Physik. 2020 Aug 1;532(8). 2000204.

    De Beule C, Dominguez F, Recher P. Aharonov-Bohm Oscillations in Minimally Twisted Bilayer Graphene. Physical review letters. 2020 Aug 28;125(9). 096402.

    De Beule C, Silvestrov PG, Liu MH, Recher P. Valley splitter and transverse valley focusing in twisted bilayer graphene. Physical Review Research. 2020 Oct 28;2(4). 043151.

    Duan Y, Bidasyuk YM, Surzhykov A. Symmetry breaking and phase transitions in Bose-Einstein condensates with spin-orbital-angular-momentum coupling. Physical Review A. 2020 Dec 24;102(6). 063328.

    Ekström J, Recher P, Schmidt TL. Transport properties of coupled Majorana bound states in the Coulomb blockade regime. Physical Review B. 2020 May 15;101(19). 195420.

    Haidekker Galambos T, Hoffman S, Recher P, Klinovaja J, Loss D. Superconducting Quantum Interference in Edge State Josephson Junctions. Physical review letters. 2020 Oct;125(15). 157701.

    Novik EG, Trauzettel B, Recher P. Transport signatures of a junction between a quantum spin Hall system and a chiral topological superconductor. Physical Review B. 2020 Jun 15;101(23). 235308.

    Park S, Sim HS, Recher P. Electron-Tunneling-Assisted Non-Abelian Braiding of Rotating Majorana Bound States. Physical review letters. 2020 Oct 28;125(18). 187702.

    Schulz F, Budich JC, Novik EG, Recher P, Trauzettel B. Voltage-tunable Majorana bound states in time-reversal symmetric bilayer quantum spin Hall hybrid systems. Physical Review B. 2019 Oct 25;100(16). 165420.

TG Members

  • Involved Members and their Relevant Expertise
    Members Institution Relevant Expertise
    Patrik Recher, Leader TUBS Theory of Emergent Correlated Quantum Matter; Josephson Junctions; Twisted Bilayer Graphene; Twisted-bilayer-graphene physics in ultracold atoms in optical potentials
    Peter Silvestrov TUBS Theory of Emergent Correlated Quantum Matter
    Daniel Frombach TUBS Josephson Junctions, Topological Systems
    Hans Werner Schumacher PTB Macroscopic Quantum Standards; Precision current metrology of single electron pumps; NV-centre-based magnetometry
    Thomas Gerster PTB precision current metrology of single electron pumps
    Alexander Fernandez-Scarioni PTB Macroscopic Quantum Standards
    David Reifert PTB Macroscopic Quantum Standards
    Rolf Haug LUH Two-dimensional materials, Electrical Quantum Effects, Magnetic Quantum Effects
    Michael Oestreich LUH Spin and charge dynamics of single carriers in single semiconductor quantum dots
    Lina Bockhorn LUH Electrical Quantum Effects
    Lena Bittermann TUBS  
    Meinhard Schilling TUBS Electronic Quantum Metrology; Optical Voltage Standard - Fast Prototyping and HTS Superconductors
    Hansjörg Scherer PTB Anomolous Quantum Hall Effect with Topological Materials
    Tobias Osborne LUH Tensor networks for many body localized systems
    Ganesh Paul LUH / TUBS Tensor networks for many body localized systems
    Christoph Karrasch TUBS Tensor networks for many body localized systems
    Hendrik Weimer LUH Theory of Dynamics of Manybody Quantum Systems
    Luis Santos LUH Theory of Dynamics of Manybody Quantum Systems; Twisted-bilayer-graphene physics in ultracold atoms in optical potentials
    Fernando Dominguez TUBS  
    Wolfram Brenig TUBS strongly correlated electron systems, quantum transport, quantum critical systems, low dimensional quantum magnets
    Peter Lemmens TUBS Propagation of Twisted Light through Media: New Possibilities for Information Transfer; Spectroscopics of Topological Materials
    Andrey Surzhykov PTB Light-Matter Interfaces and Dynamics
    Yuriy Bidasyuk PTB Interaction of twisted light with Bose-Einstein condensates