A 1.5-GHz silicon "comb" that is said to be the world's fastest nanoscale electromechanical system (NEMS) is nevertheless huge on the quantum scale: The oscillation of its teeth exhibit the world's biggest quantum motion. According to the research project team, headed by Boston University professor Pritiraj Mohanty, the teeth of the comb exhibit quantum-mechanical motion by jumping between two discrete positions without passing through the physical space between them. "We believe that our system is truly a macroscopic quantum system, [but since] it's a new phenomenon, it's best not to be guided by expectations based on conventional wisdom. The philosophy here is to let the data speak for itself," said Alexei Gaidarzhy, one of the principal researchers in Mohanty's group. Other researchers in Mohanty's group included Guiti Zolfagharkhani, a graduate student, and Robert Badzey, a post-doctoral Fellow in Boston University's Physics Department.