11 papers
Subgap Bound States from Dynamical Impurities
Joshuah T. Heath
We find that a single non-magnetic dynamical impurity (e.g., a low-frequency localized "vibron" mode) induces a subgap bound state in an s-wave superconductor. A closed-form soluti…
Typical Entanglement of Superpositions
Damien Quinn, Joshuah T. Heath, Graham Kells
We investigate universal entanglement properties inherent to superpositions of randomized states. We find that an -fold superposition of typical states may be classified into tw…
Tailoring Superconductivity with Two-Level Systems
Joshuah T. Heath, Alexander C. Tyner, S. Pamir Alpay +2
We investigate the impact of two-level systems (TLSs) on superconductivity, treating them as soft modes localised in real space. We show that these defects can either enhance or su…
Many-body effects of two-level systems in superconducting qubits
Joshuah T. Heath, Alexander C. Tyner, Thue Christian Thann +4
Superconducting qubits are often adversely affected by two-level systems (TLSs) within the Josephson junction, which contribute to decoherence and subsequently limit the performanc…
Identification of soft modes in amorphous AlO via first-principles
Alexander C. Tyner, Joshuah T. Heath, Thue Christian Thann +4
Amorphous AlO is a fundamental component of modern superconducting qubits. While amphorphous oxides offer distinct advantages, such as directional isotropy and a consis…
Gauging away the Stoner model: Engineering unconventional metallic ferromagnetism with artificial gauge fields
Joshuah T. Heath, Kevin S. Bedell
For nearly a century, the Stoner model has dominated research in itinerant ferromagnetism, yet recent work on ultracold, optically trapped Fermi gases suggests that phase separatio…