Abstract:
A new experiment in the US has come close to detecting quantum effects in a macroscopic object. Keith Schwab and colleagues from the National Security Agency (NSA) working at the University of Maryland have measured the vibrations of a tiny nanoelectromechanical arm to probe the limits at which quantum behaviour breaks down and classical physics takes over. Although the experiment was not quite sensitive enough to test the uncertainty principle, it has come closer to doing so than previous attempts.