Quieter Than Emptiness, International Team Develops Technology to Manipulate Quantum States of Light In Less Than Zero Noise Environments Reducing noise below the sound of silence Excerpts and salient points...

NIST Device Measures Amount of Nothing.  NIST has developed a portable device to measure extreme vacuum in a space.  Trapped ions, magneto-optical traps, and cold-atom vacuum standards (CAVS) all play...