Spin-flip lifetimes in superconducting atom chips: Bardeen-Cooper-Schrieffer versus Eliashberg theory
Ulrich Hohenester, Asier Eiguren, Stefan Scheel, E. A. Hinds
DOI 10.1103/PhysRevA.76.033618 · Physical Review A
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
We investigate theoretically the magnetic spin-flip transitions of neutral atoms trapped near a superconducting slab. Our calculations are based on a quantum-theoretical treatment of electromagnetic radiation near dielectric and metallic bodies. Specific results are given for rubidium atoms near a niobium superconductor. At the low frequencies typical of atomic transitions, we find that BCS theory greatly overestimates coherence effects, which are much less pronounced when quasiparticle lifetime effects are included through Eliashberg theory. At 4.2K, the typical atomic spin lifetime is found to be larger than 1000s, even for atom-superconductor distances of one 1μm. This constitutes a large enhancement in comparison with normal metals.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Nb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
Similar papers
Spin flip lifetimes in superconducting atom chips: BCS versus Eliashberg theory
similarity 0.99Ulrich Hohenester et al. · 2007 · arXiv:0707.0238
Source status unknown — claims are unverified
Spin Decoherence in Superconducting Atom Chips
similarity 0.93Bo-Sture K. Skagerstam et al.
Source status unknown — claims are unverified
Flux-vector model of spin noise in superconducting circuits: Electron versus nuclear spins and role of phase transition
similarity 0.92S. LaForest & Rogério de Sousa
Source status unknown — claims are unverified
Energy Relaxation Time between Macroscopic Quantum Levels in a Superconducting Persistent-Current Qubit
similarity 0.92Yang Yu et al.
Source status unknown — claims are unverified
Momentum relaxation in a semiconductor proximity-coupled to a disordered s-wave superconductor: Effect of scattering on topological superconductivity
similarity 0.91Roman M. Lutchyn et al.
Source status unknown — claims are unverified
Spin current in ferromagnet-insulator-superconductor junctions
similarity 0.91S. Kashiwaya et al.
Source status unknown — claims are unverified