A scalable high-performance magnetic shield for very long baseline atom interferometry

We report on the design, construction, and characterization of a 10 m-long high-performance magnetic shield for very long baseline atom interferometry. We achieve residual fields below 4 nT and longitudinal inhomogeneities below 2.5 nT/m over 8 m along the longitudinal direction. Our modular design can be extended to longer baselines without compromising the shielding performance. Such a setup constrains biases associated with magnetic field gradients to the sub-pm/s² level in atomic matterwave accelerometry with rubidium atoms and paves the way toward tests of the universality of free fall with atomic test masses beyond the 10^-13 level.

Brachial plexus neuropathy following high-dose cytarabine in acute monoblastic leukemia

We describe brachial plexus neuropathy with high-dose cytarabine (Ara-C) therapy in a man who had acute monoblastic leukemia. Signs and symptoms of brachial plexus neuropathy appeared on two occasions within hours of exposure to high-dose Ara-C. Central nervous system complications have been described following systemic and intrathecal Ara-C. High-dose Ara-C has not been implicated previously as a cause of brachial plexus neuropathy.