310 citations · 1.8k across the 29 of their papers we have counts for
29 papers
20 Second Parity Lifetime in an InAs--Pb Tetron Device
Morteza Aghaee, Zulfi Alam, Mariusz Andrzejczuk +162
A central promise of topological quantum computing is that increasing the excitation gap improves device performance significantly. Here, we experimentally validate this principle…
Shubnikov-de Haas Characterization of Superconductor-Semiconductor Heterostructures
A. M. Zimmerman, Saeed Fallahi, Sergei Gronin +13
Hybrid superconductor-semiconductor nanostructures are a central component for research spanning condensed matter physics and quantum information processing. Continued progress rel…
Distinct Lifetimes for and Loop Measurements in a Majorana Tetron Device
Morteza Aghaee, Zulfi Alam, Rikke Andersen +164
We present a hardware realization and measurements of a tetron qubit device in a superconductor-semiconductor heterostructure. The device architecture contains two parallel superco…
Response to recent comments on Phys. Rev. B 107, 245423 (2023) and Subsection S4.3 of the Supp. Info. for Nature 638, 651-655 (2025)
Morteza Aghaee, Zulfi Alam, Mariusz Andrzejczuk +127
The topological gap protocol (TGP) is a statistical test designed to identify a topological phase with high confidence and without human bias. It is used to determine a promising p…
Roadmap to fault tolerant quantum computation using topological qubit arrays
David Aasen, Morteza Aghaee, Zulfi Alam +179
We describe a concrete device roadmap towards a fault-tolerant quantum computing architecture based on noise-resilient, topologically protected Majorana-based qubits. Our roadmap e…
Self-consistent quasi-particle and hybrid functional calculations for Al/InAs/Al heterojunctions: band offset and spin-orbit coupling effects
H. Ness, F. Corsetti, D. Pashov +4
The electronic structure of surfaces and interfaces plays a key role in the properties of quantum devices. Here, we study the electronic structure of realistic Al/InAs/Al heterojun…
Interferometric Single-Shot Parity Measurement in an InAs-Al Hybrid Device
Morteza Aghaee, Alejandro Alcaraz Ramirez, Zulfi Alam +159
The fusion of non-Abelian anyons or topological defects is a fundamental operation in measurement-only topological quantum computation. In topological superconductors, this operati…
Comment on Hess et al. Phys. Rev. Lett. {\bf 130}, 207001 (2023)
A. Antipov, W. Cole, K. Kalashnikov +5
In this comment, we show that the model introduced in Hess et al. Phys. Rev. Lett. {\bf 130}, 207001 (2023) fails the topological gap protocol (TGP) (Pikulin et al., arXiv:2103.122…
Few-mode to mesoscopic junctions in gatemon qubits
Alisa Danilenko, Deividas Sabonis, Georg W. Winkler +3
We investigate a semiconductor nanowire-based gatemon qubit with epitaxial Al on two facets of the nanowire, allowing gate control of wire density. Two segments have the Al removed…
InAs-Al Hybrid Devices Passing the Topological Gap Protocol
Morteza Aghaee, Arun Akkala, Zulfi Alam +124
We present measurements and simulations of semiconductor-superconductor heterostructure devices that are consistent with the observation of topological superconductivity and Majora…
Protocol to identify a topological superconducting phase in a three-terminal device
Dmitry I. Pikulin, Bernard van Heck, Torsten Karzig +13
We develop a protocol to determine the presence and extent of a topological phase with Majorana zero modes in a hybrid superconductor-semiconductor device. The protocol is based on…
First principles feasibility assessment of a topological insulator at the InAs/GaSb interface
Shuyang Yang, Derek Dardzinski, Andrea Hwang +3
First principles simulations are conducted to shed light on the question of whether a two-dimensional topological insulator (2DTI) phase may be obtained at the interface between In…
Electronic structure of InAs and InSb surfaces: density functional theory and angle-resolved photoemission spectroscopy
Shuyang Yang, Niels B. M. Schröter, Sergej Schuwalow +10
The electronic structure of surfaces plays a key role in the properties of quantum devices. However, surfaces are also the most challenging to simulate and engineer. Here, we study…
Full parity phase diagram of a proximitized nanowire island
J. Shen, G. W. Winkler, F. Borsoi +14
We measure the charge periodicity of Coulomb blockade conductance oscillations of a hybrid InSb-Al island as a function of gate voltage and parallel magnetic field. The periodicity…
Andreev Modes from Phase Winding in a Full-shell Nanowire-based Transmon
A. Kringhøj, G. W. Winkler, T. W. Larsen +6
We investigate transmon qubits made from semiconductor nanowires with a fully surrounding superconducting shell. In the regime of reentrant superconductivity associated with the de…
Flux-induced topological superconductivity in full-shell nanowires
S. Vaitiekėnas, G. W. Winkler, B. van Heck +8
We present a novel route to realizing topological superconductivity using magnetic flux applied to a full superconducting shell surrounding a semiconducting nanowire core. In the d…
Topology of Triple-Point Metals
Georg W. Winkler, Sobhit Singh, Alexey A. Soluyanov
We discuss and illustrate the appearance of topological fermions and bosons in triple-point metals, where a band crossing of three electronic bands occurs close to the Fermi level.…
A unified numerical approach to semiconductor-superconductor heterostructures
Georg W. Winkler, Andrey E. Antipov, Bernard van Heck +4
We develop a unified numerical approach for modeling semiconductor-superconductor heterostructures. Our approach takes into account on equal footing important key ingredients: prox…
Flux-induced Majorana modes in full-shell nanowires
S. Vaitiekėnas, M. -T. Deng, P. Krogstrup +1
We demonstrate a novel means of creating Majorana zero modes using magnetic flux applied to a full superconducting shell surrounding a semiconducting nanowire core, unifying approa…
Topological superconductivity in full shell proximitized nanowires
Roman M. Lutchyn, Georg W. Winkler, Bernard van Heck +4
We consider a new model system supporting Majorana zero modes based on semiconductor nanowires with a full superconducting shell. We demonstrate that, in the presence of spin-orbit…
Electric field tunable superconductor-semiconductor coupling in Majorana nanowires
Michiel W. A. de Moor, Jouri D. S. Bommer, Di Xu +16
We study the effect of external electric fields on superconductor-semiconductor coupling by measuring the electron transport in InSb semiconductor nanowires coupled to an epitaxial…
Automated construction of symmetrized Wannier-like tight-binding models from ab initio calculations
Dominik Gresch, QuanSheng Wu, Georg W. Winkler +3
Wannier tight-binding models are effective models constructed from first-principles calculations. As such, they bridge a gap between the accuracy of first-principles calculations a…
Effects of gate-induced electric fields on semiconductor Majorana nanowires
Andrey E. Antipov, Arno Bargerbos, Georg W. Winkler +3
We study the effect of gate-induced electric fields on the properties of semiconductor-superconductor hybrid nanowires which represent a promising platform for realizing topologica…
Orbital contributions to the electron g-factor in semiconductor nanowires
Georg W. Winkler, Dániel Varjas, Rafal Skolasinski +3
Recent experiments on Majorana fermions in semiconductor nanowires [Albrecht et al., Nat. 531, 206 (2016)] revealed a surprisingly large electronic Landé g-factor, several times la…