37 citations · 106 across the 25 of their papers we have counts for
25 papers
Symmetry-Induced Weyl Nodes in Interacting Multi-Terminal Josephson Junctions
Peter Zalom, Gustavo Diniz, David Christian Ohnmacht +1
We show that an emergent geometric symmetry generates non-trivial topology in quantum-dot-based multi-terminal Josephson junctions. It confines same-spin Andreev bound state crossi…
Yu-Shiba-Rusinov States in Ising Superconductors
Michael Hein, Juan Carlos Cuevas, Wolfgang Belzig
The nature of the superconducting state in two-dimensional transition-metal dichalcogenides remains under active debate. A widely used description invokes so-called \textit{Ising s…
Nonequilibrium Kramers Turnover in a Kerr Parametric Oscillator
Daniel K. J. Boneß, Gabriel Margiani, Wolfgang Belzig +2
Activation processes govern noise-induced switching between long-lived states. In an equilibrium double well, the thermally activated switching rate exhibits a prefactor with a non…
Transparency-controlled multiple charge transfer in superconducting junctions with local shot-noise scanning tunneling spectroscopy
Yudai Sato, Maialen Ortego Larrazabal, Jian-Feng Ge +6
Charge transport in superconducting junctions at finite voltages is governed by Andreev reflections, including multiple Andreev reflections, which are processes that enable multipl…
Identical, independent quantum weak measurements violate objective realism
Tomasz Rybotycki, Tomasz Białecki, Josep Batle +4
We demonstrate violation of objective realism in quantum world using unconstrained weak measurements. Instead of limited Leggett-Garg approach with artificial bounds on the observe…
Collapse of the superconducting order parameter in Ising superconductors with Rashba spin-orbit coupling
J. S. Harms, M. Hein, W. Belzig
Ising superconductors have attracted quite some attention recently, due to their resilience against magnetic fields way beyond the Pauli-paramagnetic limit. Their protection agains…
The role of charge in thermodynamic uncertainty relations
David Christian Ohnmacht, Wolfgang Belzig, Juan Carlos Cuevas
We demonstrate that the charge value of transport mechanisms heavily impacts the validity of thermodynamic uncertainty relations (TURs). Specifically, we show within the framework…
Finite Length Effects and Coulomb Interaction in Ge Quantum Well-Based Josephson Junctions Probed with Microwave Spectroscopy
S. C. ten Kate, D. C. Ohnmacht, M. Coraiola +10
Proximitized Ge quantum wells have emerged as a novel platform for studying Andreev bound states (ABSs), due to their expected strong spin-orbit interaction and high mobility. Here…
Sextets in four-terminal Josephson junctions
Miriam Rike Ebert, David Christian Ohnmacht, Wolfgang Belzig +1
Multiterminal superconducting junctions have revitalized the investigation of the Josephson effect. One of the most interesting aspects of these hybrid systems is the occurrence of…
Nonclassical Photon-Assisted Transport in Superconducting Tunnel Junctions
Matthias Hübler, Juan Carlos Cuevas, Wolfgang Belzig
Advances in circuit quantum electrodynamics have enabled the generation of arbitrary nonclassical microwave states and paved the way for addressing novel physics questions. Here, w…
Specular-Andreev reflection and Andreev interference in an Ising superconductor junction
Gaoyang Li, Sourabh Patil, Yanxia Xing +2
Being resilient to magnetic field, Ising superconductor serves as an exceptional platform for studying the interplay between superconductivity and magnetism. In this Letter, we fir…
Reflectionless modes as a source of Weyl nodes in multiterminal Josephson junctions
David Christian Ohnmacht, Valentin Wilhelm, Wolfgang Belzig
Multiterminal Josephson junctions are a promising platform to study non-trivial topology in engineered quantum systems. Yet, experimentally meaningful insight into what exactly mak…
Multiterminal Josephson junctions with tunable topological properties
Panch Ram, Detlef Beckmann, Romain Danneau +1
Since the discovery of the Andreev reflection process at normal-metal/superconductor junctions and the corresponding Andreev bound states in superconductor/normal-metal/superconduc…
Exploring the energy spectrum of a four-terminal Josephson junction: Towards topological Andreev band structures
Tommaso Antonelli, Marco Coraiola, David Christian Ohnmacht +10
Hybrid multiterminal Josephson junctions (JJs) are expected to harbor a novel class of Andreev bound states (ABSs), including topologically nontrivial states in four-terminal devic…
Zero-temperature phase-flip rate in a biased parametric oscillator
Daniel K. J. Boneß, Wolfgang Belzig, Mark I. Dykman
A parametrically driven oscillator has two stable vibrational states at half the modulation frequency. The states have opposite phase and equal amplitudes. An extra drive at half t…
Scattering approach to near-field radiative heat transfer
Matthias Hübler, Denis M. Basko, Wolfgang Belzig
We formulate the problem of near-field radiative heat transfer as an effective quantum scattering theory for excitations of the matter. Built from the same ingredients as the semic…
Non-hermitian topology in multiterminal superconducting junctions
David Christian Ohnmacht, Valentin Wilhelm, Hannes Weisbrich +1
Recent experimental advancements in dissipation control have yielded significant insights into non-hermitian Hamiltonians for open quantum systems. Of particular interest are the t…
Thermodynamic uncertainty relations in superconducting junctions
David Christian Ohnmacht, Juan Carlos Cuevas, Wolfgang Belzig +3
Quantum conductors attached to metallic reservoirs have been demonstrated to overcome the thermodynamic uncertainty relation (TUR), a trade-off relation between the amount of dissi…
Resonant-force induced symmetry breaking in a quantum parametric oscillator
D. K. J. Boneß, W. Belzig, M. I. Dykman
A parametrically modulated oscillator has two opposite-phase vibrational states at half the modulation frequency. An extra force at the vibration frequency breaks the symmetry of t…
Nonlinearity-induced symmetry breaking in a system of two parametrically driven Kerr-Duffing oscillators
F. Hellbach, D. De Bernardis, M. Saur +3
We study the classical dynamics of a system comprising a pair of Kerr-Duffing nonlinear oscillators, which are coupled through a nonlinear interaction and subjected to a parametric…
On-demand population of Andreev levels by their ionization in the presence of Coulomb blockade
Pavel D. Kurilovich, Vladislav D. Kurilovich, Aleksandr E. Svetogorov +3
A mechanism to deterministically prepare a nanowire Josephson junction in an odd parity state is proposed. The mechanism involves population of two Andreev levels by a resonant mic…
Flux-Tunable Josephson Diode Effect in a Hybrid Four-Terminal Josephson Junction
M. Coraiola, A. E. Svetogorov, D. Z. Haxell +10
We investigate the direction-dependent switching current in a flux-tunable four-terminal Josephson junction defined in an InAs/Al two-dimensional heterostructure. The device exhibi…
Quartet Tomography in Multiterminal Josephson Junctions
David Christian Ohnmacht, Marco Coraiola, Juan José García-Esteban +4
We investigate the detection of quartets in hybrid multiterminal Josephson junctions. Using simple models of quantum dots coupled to superconducting leads, we find that quartets ar…
Calorimetry of a Quantum Phase Slip
E. Gümüş, D. Majidi, D. Nikolić +8
In a Josephson junction, which is the central element in superconducting quantum technology, irreversibility arises from abrupt slips of the gauge-invariant quantum phase differenc…