linkedin post 2015-05-17 06:10:29
SUPERCONDUCTOR ANALOGY. “While a space-time crystal looks like a perpetual motion machine and may seem implausible at first glance ... keep in mind that a superconductor or even a normal metal ring can support persistent electron currents in its quantum ground state under the right conditions. Of course, electrons in a metal lack spatial order and therefore can’t be used to make a space-time crystal.” https://lnkd.in/ea8Mnvh View in LinkedIn