196 citations · 1.1k across the 32 of their papers we have counts for
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Altermagnetic spin textures: Emergent electrodynamics, quantum geometry, and probes
Constantin Schrade, Mathias S. Scheurer
Emergent electrodynamics arising from spatially and temporally varying magnetic textures provides a framework for spin control in quantum materials. While this principle is establi…
Altermagnetic Superconducting Diode Effect in MnPt/Nb Heterostructures
Saurav Sachin, Mathias S. Scheurer, Constantin Schrade +1
Compensated magnetic orders that can split the spin-degeneracy of electronic bands have become a very active field of research. As opposed to spin-orbit coupling, the splitting res…
Altermagnetic superconducting diode effect from non-collinear compensated magnetism in MnPt
Constantin Schrade, Sujit Manna, Mathias S. Scheurer
Altermagnets have recently emerged as a distinct class of magnetic systems that exhibit spin splitting of electronic bands while retaining zero net magnetization. This unique combi…
Fermionic Quantum Simulation on Andreev Bound State Superlattices
Peter D. Johannsen, Constantin Schrade
Arrays of superconducting qubits and cavities offer a promising route for realizing highly controllable artificial materials. However, many analog simulations of superconducting ci…
Dissipationless Nonlinearity in Quantum Material Josephson Diodes
Constantin Schrade, Valla Fatemi
Dissipationless nonlinearities for three-wave mixing are a key component of many superconducting quantum devices, such as amplifiers and bosonic qubits. So far, such third-order no…
Parity-conserving Cooper-pair transport and ideal superconducting diode in planar Germanium
Marco Valentini, Oliver Sagi, Levon Baghumyan +16
Superconductor/semiconductor hybrid devices have attracted increasing interest in the past years. Superconducting electronics aims to complement semiconductor technology, while hyb…
Gate Tunable Josephson Diode in Proximitized InAs Supercurrent Interferometers
Carlo Ciaccia, Roy Haller, Asbjørn C. C. Drachmann +4
The Josephson diode (JD) is a non-reciprocal circuit element that supports a larger critical current in one direction compared to the other. This effect has gained a growing intere…
Nonsinusoidal current-phase relations in semiconductor-superconductor-ferromagnetic insulator devices
Andrea Maiani, Karsten Flensberg, Martin Leijnse +3
Coherent tunneling processes of multiple Cooper pairs across a Josephson junction give rise to higher harmonics in the current phase relation. In this work, we propose and study Jo…
The Josephson diode effect in supercurrent interferometers
Rubén Seoane Souto, Martin Leijnse, Constantin Schrade
A Josephson diode is a non-reciprocal circuit element that supports a larger dissipationless supercurrent in one direction than in the other. In this work, we propose and theoretic…
Supercurrent parity-meter in a nanowire Cooper-pair transistor
Ji-Yin Wang, Constantin Schrade, Vukan Levajac +13
We study a Cooper-pair transistor realized by two Josephson weak links that enclose a superconducting island in an InSb-Al hybrid nanowire. When the nanowire is subject to a magnet…
Entangling Spins in Double Quantum Dots and Majorana Bound States
Marko J. Rančić, Silas Hoffman, Constantin Schrade +2
We study the coupling between a singlet-triplet qubit realized in a double quantum dot to a topological qubit realized by spatially well-separated Majorana bound states. We demonst…
Andreev or Majorana, Cooper finds out
Constantin Schrade, Liang Fu
We study a Cooper pair transistor realized by a mesoscopic superconductor island that couples to a pair of -wave superconducting leads. For a trivial island, the critical superc…
Quantum Computing with Majorana Kramers Pairs
Constantin Schrade, Liang Fu
We propose a universal gate set acting on a qubit formed by the degenerate ground states of a Coulomb-blockaded time-reversal invariant topological superconductor island with spati…
Majorana Superconducting Qubit
Constantin Schrade, Liang Fu
We propose a platform for universal quantum computation that uses conventional -wave superconducting leads to address a topological qubit stored in spatially separated Majorana…
Parity-controlled Josephson effect mediated by Majorana Kramers pairs
Constantin Schrade, Liang Fu
We study a time-reversal-invariant topological superconductor island hosting spatially separated Majorana Kramers pairs, with weak tunnel couplings to two s-wave superconducting le…
DIII Topological Superconductivity with Emergent Time-Reversal Symmetry
Christopher Reeg, Constantin Schrade, Jelena Klinovaja +1
We find a new class of topological superconductors which possess an emergent time-reversal symmetry that is present only after projecting to an effective low-dimensional model. We…
Low-field Topological Threshold in Majorana Double Nanowires
Constantin Schrade, Manisha Thakurathi, Christopher Reeg +3
A hard proximity-induced superconducting gap has recently been observed in semiconductor nanowire systems at low magnetic fields. However, in the topological regime at high magneti…
Detecting Topological Superconductivity with Josephson Junctions
Constantin Schrade, Silas Hoffman, Daniel Loss
The interplay of superconductivity, magnetic fields, and spin-orbit interaction lies at the heart of topological superconductivity. Remarkably, the recent experimental discovery of…
Universal Quantum Computation with Hybrid Spin-Majorana Qubits
Silas Hoffman, Constantin Schrade, Jelena Klinovaja +1
We theoretically propose a set of universal quantum gates acting on a hybrid qubit formed by coupling a quantum dot spin qubit and Majorana fermion qubit. First, we consider a quan…
Proximity-induced Josephson -Junctions in Topological Insulators
Constantin Schrade, A. A. Zyuzin, Jelena Klinovaja +1
We study two microscopic models of topological insulators in contact with an -wave superconductor. In the first model the superconductor and the topological insulator are tunnel…