An atomic beam magnetic resonance study of a superconductor's magnetic vortex lattice /

Harald Hauglin, Nathan G. Woodard, Samuel Dapore-Schwartz +1 more

Truman R. Brown

Harald Hauglin, Samuel Dapore-Schwartz, Nathan G. Woodard +1 more

Samuel Dapore-Schwartz, Nathan G. Woodard, Gregory P. Lafyatis

We have developed an atomic beam technique for studying magnetic vortices and vortex lattices of superconductors. Atoms moving near a superconductor's surface see a fluctuating magnetic field as they pass vortices. This field may drive magnetic resonance transitions between hyperfine states. Measuring the magnetic resonance transition probability as a function of atom velocity probes the vortex lattice autocorrelation function. We demonstrate this technique by studying the vortex lattice of a niobium film sample and measuring the sample's penetration depth. We also identify a systematic problem that we think thwarted an earlier attempt to experimentally realize this technique.

D. F. Agterberg, Suk Bum Chung, Eun-Ah Kim

Oriol Romero‐Isart, Carles Navau, Alvaro Sanchez +2 more

We propose and analyze a nanoengineered vortex array in a thin-film type-II superconductor as a magnetic lattice for ultracold atoms. This proposal addresses several of the key questions in the development of atomic quantum simulators. By trapping atoms close to the surface, tools of nanofabrication and structuring of lattices on the scale of few tens of nanometers become available with a corresponding benefit in energy scales and temperature requirements. This can be combined with the possibility of magnetic single site addressing and manipulation together with a favorable scaling of superconducting surface-induced decoherence.