Membrane Resonator (IMAGE) University of Copenhagen - Niels Bohr Institute Caption A membrane resonator (central white square) is in its 'phononic crystal' shield of cross-shaped holes. Even though the membrane is nearly the size of a flea (0.5mm), its motion follows the laws of quantum mechanics, as Niels Bohr Institute researchers show. Credit (Credit: Albert Schliesser, NBI) Usage Restrictions (Credit: Albert Schliesser, NBI) License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.