Every time you check the time on your phone, make an online transaction, or use a navigation app, you are depending on the precision of atomic clocks.An atomic clock keeps time by relying on the “ticks” of atoms as they naturally oscillate at rock-steady frequencies. Today’s atomic clocks operate by tracking cesium atoms, which tick over 10 billion times per second. Each of those ticks is precisely tracked using lasers that oscillate in sync, at microwave frequencies.Scientists are developing ne...