Tom'as A. Arias

collaborators

3 papers

cond-mat.supr-con2026

From Atomistic Impurity Landscapes to Two-Level-System Distributions and Microwave Loss: Hydrogen-Induced Losses in Nb $_{2}$ O $_{5 - δ}$ and Ta $_{2}$ O $_{5 - δ}$

Cristóbal Méndez, Tomás A. Arias, Sarvesh Chaudhari

We introduce a first-principles-guided framework for predicting statistical TLS distributions from mobile impurities in disordered materials. Machine-learned interatomic potentials…

cond-mat.supr-con2025

A Computational Picture of Hydride Formation and Dissipation In Nb SRF Cavities

Aiden Harbick, Mark Transtrum, Nathan Sitaraman +2

Research linking surface hydrides to Q-disease, and the subsequent development of methods to eliminate surface hydrides, is one of the great successes of SRF cavity R&D. We use tim…

cond-mat.supr-con2025

$Ab initio$ Theory of Eliminating Surface Oxides of Superconductors with Noble-Metal Encapsulation

Cristóbal Méndez, Nathan Sitaraman, Matthias Liepe +1

Nanometer-scale surface chemistry limits the performance of SRF cavities and quantum circuits. We present an ab initio framework connecting DFT interfacial energetics with strong-c…

From Atomistic Impurity Landscapes to Two-Level-System Distributions and Microwave Loss: Hydrogen-Induced Losses in Nb2​O5−δ​ and Ta2​O5−δ​

A Computational Picture of Hydride Formation and Dissipation In Nb SRF Cavities

Ab initio Theory of Eliminating Surface Oxides of Superconductors with Noble-Metal Encapsulation

From Atomistic Impurity Landscapes to Two-Level-System Distributions and Microwave Loss: Hydrogen-Induced Losses in Nb $_{2}$ O $_{5 - δ}$ and Ta $_{2}$ O $_{5 - δ}$

$Ab initio$ Theory of Eliminating Surface Oxides of Superconductors with Noble-Metal Encapsulation