\u201cWant to come to a quantum computing party?\u201d I wasn\u2019t expecting the question. My brain was hurting: I\u2019d just finished an hour-long interview with Jarrod McClean, a Google quantum computing scientist, and I was mentally planning to write up my notes. His talk had caught my attention the day before: McClean spoke animatedly, bobbing a magnificent head of shoulder-length ringlets, as he pointed at equations and diagrams on a PowerPoint presentation.