I can't read the whole thing but my initial question is answered in the subtitle. > Researchers have quantum entangled atomic clocks, allowing them to be synch

I can't read the whole thing but my initial question is answered in the subtitle. > Researchers have quantum entangled atomic clocks, allowing them to be synchronised more accurately. Such entangled clocks could be used to study dark matter and gravity more precisely. So now we have clocks more accurate than regular atomic clocks.