A version 1 arXiv preprint describes SPT-3G+, a planned South Pole Telescope receiver with modeled cooling margin and a projected mapping speed nearly an order of magnitude above current SPT-3G.
A laboratory experiment reports pairs of attosecond soft-X-ray pulses with adjustable timing and evidence that their relative phase could be tuned. The study characterizes the light source and its diagnostics; it does not report a direct molecular or quantum-system control experiment.