Gas of Ultracold Atoms (IMAGE) Princeton University Caption To explore what happens when electrical resistance develops in unconventional metals, researchers led by Princeton University physicists sent a density wave through a gas of ultracold atoms (top left). The researchers observed the dissipation of the density wave over time, which is analogous to what happens in metals when resistance slows the flow of electricity. They found that the atoms exhibited behaviors of so-called "bad" and "strange" metals, findings that may help researchers understand high temperature superconductivity. The bottom row shows the same experiment using a finer ripple. Credit Peter Brown and Waseem Bakr, Princeton University Usage Restrictions Peter Brown and Waseem Bakr, Princeton University 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.