Topological Systems – QuantumFrontiers – Leibniz University Hannover

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

Activities

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"

Cooperations

Topical Group

Quantum Electrical Standards

Topical Group

Quantum Computation Concepts

Scientific Output

Publications

Osborne TJ, Stottmeister A. Conformal Field Theory from Lattice Fermions. Communications in Mathematical Physics. 2023 Feb;398(1):219-289.
doi.org/10.48550/arXiv.2107.13834
,
doi.org/10.1007/s00220-022-04521-8

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.
doi.org/10.1016/j.jallcom.2021.162291

Jamadagni A, Weimer H. Operational definition of topological order. Physical Review B. 2022 Aug 31;106(8). 085143.
doi.org
arxiv.org/abs/2005.06501
,
doi.org/10.1103/PhysRevB.106.085143

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.
doi.org/10.1103/PhysRevB.106.085406

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.
doi.org/10.1088/2053-1583/abf98b

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.
doi.org/10.1063/5.0047602

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.
doi.org/10.1063/10.0006577

De Beule C, Dominguez F, Recher P. Effective Floquet model for minimally twisted bilayer graphene. Physical Review B. 2021 May 21;103(19). 195432.
doi.org/10.1103/PhysRevB.103.195432

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.
doi.org/10.1103/PhysRevLett.126.077202

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 Pb_xTaSe₂. 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.
doi.org/10.1103/physrevb.104.165118

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.
doi.org/10.1088/2053-1583/ac152e

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.
doi.org/10.1021/acs.jpcc.1c01134

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.
doi.org/10.1103/PhysRevB.103.115142

Osborne TJ, Stottmeister A. Quantum Simulation of Conformal Field Theory. 2021 Sep 29.
doi.org/10.48550/arXiv.2109.14214

Prikhodko OO, Bidasyuk YM. Projected gross–pitaevskii equation for ring-shaped bose–einstein condensates. Ukrainian Journal of Physics. 2021;66(3):198-205.
doi.org/10.15407/ujpe66.3.198

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.
doi.org/10.48550/arXiv.2110.03532

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.
doi.org/10.1002/andp.202000204

De Beule C, Dominguez F, Recher P. Aharonov-Bohm Oscillations in Minimally Twisted Bilayer Graphene. Physical review letters. 2020 Aug 28;125(9). 096402.
doi.org/10.1103/PhysRevLett.125.096402

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.
doi.org/10.1103/PhysRevResearch.2.043151

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.
doi.org/10.1103/PhysRevA.102.063328

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.
doi.org/10.1103/PhysRevB.101.195420

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.
doi.org/10.1103/PhysRevLett.125.157701

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.
doi.org/10.1103/PhysRevB.101.235308

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.
doi.org/10.1103/PhysRevLett.125.187702

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.
doi.org/10.1103/physrevb.100.165420

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

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