631 citations · 1.2k across the 22 of their papers we have counts for
22 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…
Excising dead components in the surface code using minimally invasive alterations: A performance study
Ryan V. Mishmash, Vadym Kliuchnikov, Juan Bello-Rivas +7
The physical implementation of a large-scale error-corrected quantum processor will necessarily need to mitigate the presence of defective (thereby "dead") physical components in i…
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…
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…
Improved Pairwise Measurement-Based Surface Code
Linnea Grans-Samuelsson, Ryan V. Mishmash, David Aasen +5
We devise a new realization of the surface code on a rectangular lattice of qubits utilizing single-qubit and nearest-neighbor two-qubit Pauli measurements and three auxiliary qubi…
Vortex-enabled Andreev processes in quantum Hall-superconductor hybrids
Yuchen Tang, Christina Knapp, Jason Alicea
Quantum Hall-superconductor heterostructures provide possible platforms for intrinsically fault-tolerant quantum computing. Motivated by several recent experiments that successfull…
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…
Performance of planar Floquet codes with Majorana-based qubits
Adam Paetznick, Christina Knapp, Nicolas Delfosse +4
Quantum error correction is crucial for any quantum computing platform to achieve truly scalable quantum computation. The surface code and its variants have been considered the mos…
Characterization and Classification of Fermionic Symmetry Enriched Topological Phases
David Aasen, Parsa Bonderson, Christina Knapp
We examine the interplay of symmetry and topological order in dimensional fermionic topological phases of matter. We define fermionic topological symmetries acting on the eme…
Torsorial actions on G-crossed braided tensor categories
David Aasen, Parsa Bonderson, Christina Knapp
We develop a method for generating the complete set of basic data under the torsorial actions of and on a -crossed braided tensor…
Anomalous exciton transport in response to a uniform, in-plane electric field
Swati Chaudhary, Christina Knapp, Gil Refael
Excitons are neutral objects, that, naively, should have no response to a uniform, electric field. Could the Berry curvature of the underlying electronic bands alter this conclusio…
Survival of the fractional Josephson effect in time-reversal-invariant topological superconductors
Christina Knapp, Aaron Chew, Jason Alicea
Time-reversal-invariant topological superconductor (TRITOPS) wires host Majorana Kramers pairs that have been predicted to mediate a fractional Josephson effect with periodici…
Number conserving analysis of measurement-based braiding with Majorana zero modes
Christina Knapp, Jukka I. Väyrynen, Roman M. Lutchyn
Majorana-based quantum computation seeks to encode information non-locally in pairs of Majorana zero modes, thereby isolating qubit states from a local noisy environment. In additi…
Fractional Chern insulator edges and layer-resolved lattice contacts
Christina Knapp, Eric M. Spanton, Andrea F. Young +2
Fractional Chern insulators (FCIs) realized in fractional quantum Hall systems subject to a periodic potential are topological phases of matter for which space group symmetries pla…
Modeling noise and error correction for Majorana-based quantum computing
Christina Knapp, Michael Beverland, Dmitry I. Pikulin +1
Majorana-based quantum computing seeks to use the non-local nature of Majorana zero modes to store and manipulate quantum information in a topologically protected way. While noise…
Dephasing of Majorana-based qubits
Christina Knapp, Torsten Karzig, Roman Lutchyn +1
We analyze charging-energy-protected Majorana-based qubits, focusing on the residual dephasing that is present when the distance between Majorana zero modes (MZMs) is insufficient…
Anyonic Entanglement and Topological Entanglement Entropy
Parsa Bonderson, Christina Knapp, Kaushal Patel
We study the properties of entanglement in two-dimensional topologically ordered phases of matter. Such phases support anyons, quasiparticles with exotic exchange statistics. The e…
Scalable Designs for Quasiparticle-Poisoning-Protected Topological Quantum Computation with Majorana Zero Modes
Torsten Karzig, Christina Knapp, Roman M. Lutchyn +9
We present designs for scalable quantum computers composed of qubits encoded in aggregates of four or more Majorana zero modes, realized at the ends of topological superconducting…
How quickly can anyons be braided? Or: How I learned to stop worrying about diabatic errors and love the anyon
Christina Knapp, Michael Zaletel, Dong E. Liu +3
Topological phases of matter are a potential platform for the storage and processing of quantum information with intrinsic error rates that decrease exponentially with inverse temp…
The Uncountability of the Unit Interval
Christina Knapp, Cesar E. Silva
For any particularly interesting theorem one proof is never enough. Instead, the first proof sets the challenge to find a more elegant method that illuminates subtle features of th…