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quant-ph2026
Transition-state lattice modes and the breakdown of adiabatic tunneling for hydrogen and deuterium in bcc Nb
P. Graham Pritchard, James M. Rondinelli
Interstitial hydrogen and deuterium in body-centered-cubic metals constitute archetypal quantum tunneling systems. Their relevance has been renewed by the connection between hydrog…
quant-ph2026
Microstructural Topology as a Prescriptor for Quantum Coherence: Towards A Unified Framework for Decoherence in Superconducting Qubits
Vinayak P. Dravid, Akshay A. Murthy, Peter Lim +5
In superconducting quantum circuits, decoherence improvements are frequently obtained through process interventions that simultaneously modify surface chemistry, microstructural to…
quant-ph2026
Lattice-Renormalized Tunneling Models for Superconducting Qubit Materials
P. G. Pritchard, James M. Rondinelli
We present a lattice-renormalized formalism for configurational tunneling two-level systems (TLS) that overcomes limitations of minimum-energy-path and light-particle models. Deriv…