A Clock that Will Last Forever

A Clock that Will Last Forever: Imagine a clock that will keep perfect time forever, even after the heat-death of the universe. This is the “wow” factor behind a device known as a “space-time crystal,” a four-dimensional crystal that has periodic structure in time as well as space. However, there are also practical and important scientific reasons for constructing a space-time crystal. ...

Lynn Yarris. (2012) A Clock that Will Last Forever. Berkeley Lab News Center. info:/