225 citations · 989 across the 30 of their papers we have counts for
31 papers
Parafermions in polarized Fractional Quantum (Anomalous) Hall Heterostructures
Steffen Bollmann, Andreas Haller, Thomas L. Schmidt +2
Motivated by recent experimental signatures of fractional Chern insulators in 2D quantum materials, we investigate the realization of parafermion zero modes (PZMs) on…
Fractional Impurity Entropy from Potential Scattering in a Free Electron Gas
Syeda Neha Zaidi, Jukka I. Väyrynen
Fractional changes in entropy are often associated with strong electron correlations or non-Abelian anyons in topological systems. We show that neither condition is necessary -- a…
Signatures of localization on the edge of a fractional topological insulator
Yuzhuo Tian, Jinhong Park, Alexander D. Mirlin +1
Recent experiments in van der Waals moiré materials have reported realizations of two-dimensional fractional topological insulators (FTIs). We study transport properties of FTI edg…
Phases of Quasi-One-Dimensional Fractional Quantum (Anomalous) Hall - Superconductor Heterostructures
Steffen Bollmann, Andreas Haller, Jukka I. Väyrynen +2
Motivated by recent observations of fractional Chern insulators (FCIs) in the vicinity of superconducting (SC) phases, we study fractional quantum (anomalous) Hall-superconductor h…
Multichannel topological Kondo models and their low-temperature conductances
Guangjie Li, Elio J. König, Jukka I. Väyrynen
In the multichannel Kondo effect, overscreening of a magnetic impurity by conduction electrons leads to a frustrated exotic ground state. It has been proposed that multichannel top…
Spin-Chain Multichannel Kondo Model via Image Impurity Boundary Condition
Jordan Gaines, Guangjie Li, Jukka Väyrynen
One of the signature observables for the electronic multichannel Kondo model is the impurity entropy, which was found in - Heisenberg chains with the open boundary condit…
Characterizing maximally many-body entangled fermionic states by using -body density matrix
Irakli Giorgadze, Haixuan Huang, Jordan Gaines +2
Fermionic Hamiltonians play a critical role in quantum chemistry, one of the most promising use cases for near-term quantum computers. However, since encoding nonlocal fermionic st…
Drag conductance induced by neutral-mode localization in fractional quantum Hall junctions
Jinhong Park, Moshe Goldstein, Yuval Gefen +2
A junction of two 2/3 fractional quantum Hall (FQH) edges, with no charge tunneling between them, may exhibit Anderson localization of neutral modes. Manifestations of such localiz…
2024 roadmap on 2D topological insulators
Bent Weber, Michael S Fuhrer, Xian-Lei Sheng +22
2D topological insulators promise novel approaches towards electronic, spintronic, and quantum device applications. This is owing to unique features of their electronic band struct…
Topological Kondo effect with spinful Majorana fermions
Steffen Bollmann, Jukka I. Väyrynen, Elio J. König
Motivated by the importance of studying topological superconductors beyond the mean-field approximation, we here investigate mesoscopic islands of time reversal invariant topologic…
Influence of disorder on antidot vortex Majorana states in 3D topological insulators
Rafał Rechciński, Aleksei Khindanov, Dmitry I. Pikulin +5
Topological insulator/superconductor two-dimensional heterostructures are promising candidates for realizing topological superconductivity and Majorana modes. In these systems, a v…
Microwave spectroscopy of Majorana vortex modes
Zhibo Ren, Justin Copenhaver, Leonid Rokhinson +1
The observation of zero-bias conductance peaks in vortex cores of certain Fe-based superconductors has sparked renewed interest in vortex-bound Majorana states. These materials are…
Majorana bound state parity exchanges in planar Josephson junctions
Varsha Subramanyan, Jukka I Vayrynen, Alex Levchenko +1
We describe a scheme to exchange fermion parity between two pairs of Majorana bound states mediated by coupling with a centralized quantum dot. We specifically formulate such a sch…
Superconducting diode effect in quasi-one-dimensional systems
Tatiana de Picoli, Zane Blood, Yuli Lyanda-Geller +1
The recent observations of the superconducting diode effect pose the challenge to fully understand the necessary ingredients for non-reciprocal phenomena in superconductors. In thi…
Topological symplectic Kondo effect
Guangjie Li, Elio J. König, Jukka I. Väyrynen
Multiple conduction channels interacting with a quantum impurity -- a spin in the conventional ``multi-channel Kondo effect'' or a topological mesoscopic device (``topological Kond…
Theory of Glide Symmetry Protected Helical Edge States in WTe Monolayer
Maciej Bieniek, Jukka I. Väyrynen, Gang Li +2
Helical edge states in quantum spin Hall (QSH) materials are central building blocks of topological matter design and engineering. Despite their principal topological protection ag…
Multichannel topological Kondo effect
Guangjie Li, Yuval Oreg, Jukka I. Väyrynen
A Coulomb blockaded -Majorana island coupled to normal metal leads realizes a novel type of Kondo effect where the effective impurity "spin" transforms under the orthogonal grou…
Diamagnetic mechanism of critical current non-reciprocity in multilayered superconductors
Ananthesh Sundaresh, Jukka Ilmari Vayrynen, Yuli Lyanda-Geller +1
Recent excitement in observation of non-reciprocal critical current (NRC) is motivated by a suggestion that "superconducting diode effect" may be an intrinsic property of non-centr…
Superconductivity of neutral modes in quantum Hall edges
Jukka I. Väyrynen, Moshe Goldstein, Yuval Gefen
Edges of quantum Hall phases give rise to a multitude of exotic modes supporting quasiparticles of different values of charge and quantum statistics. Among these are neutralons (ch…
Majorana signatures in charge transport through a topological superconducting double-island system
Jukka I. Väyrynen, Dmitry I. Pikulin, Roman M. Lutchyn
We investigate the dynamics of a charge qubit consisting of two Coulomb-blockaded islands hosting Majorana zero modes. The frequency of the qubit is determined by coherent single-e…
Superconducting correlations out of repulsive interactions on a fractional quantum Hall edge
Jukka I. Väyrynen, Moshe Goldstein, Yuval Gefen
We consider a fractional quantum Hall bilayer system with an interface between quantum Hall states of filling fractions and , mo…
Zeeman and spin-orbit effects in the Andreev spectra of nanowire junctions
B. van Heck, J. I. Väyrynen, L. I. Glazman
We study the energy spectrum and the electromagnetic response of Andreev bound states in short Josephson junctions made of semiconducting nanowires. We focus on the joint effect of…
Current noise from a magnetic moment in a helical edge
Jukka I. Väyrynen, Leonid I. Glazman
We calculate the two-terminal current noise generated by a magnetic moment coupled to a helical edge of a two-dimensional topological insulator. When the system is symmetric with r…
Microwave spectroscopy of spinful Andreev bound states in ballistic semiconductor Josephson junctions
David J. van Woerkom, Alex Proutski, Bernard van Heck +7
The superconducting proximity effect in semiconductor nanowires has recently enabled the study of new superconducting architectures, such as gate-tunable superconducting qubits and…