Towards universal quantum time
Nature Physics
2014년6월16일
A quantum network of atomic clocks could create even more accurate and stable time-keeping devices than present atomic clocks, reports a paper published online this week in Nature Physics. Such a network could have technological applications as well as provide a resource for Earth science studies and fundamental tests of relativity and quantum gravity.
The modern world relies heavily on accurate time-keeping, for instance for the operation of the Global Positioning System, or synchronization in high-frequency financial trading.
Based on a combination of precision metrology and quantum technologies, Peter Komar, Mikhail Lukin and colleagues show that a network of atomic clocks sharing quantum entanglement would achieve a time-keeping stability better than that of any individual clock. Distributed around the Earth and on satellites, the clock network could maintain and synchronize time standards across multiple parties in real-time - a true world clock. Furthermore, by its very nature, this quantum network of atomic clocks would be protected against quantum-cryptographic attacks.
doi: 10.1038/nphys3000
리서치 하이라이트
-
7월29일
Engineering: Just add water to activate a disposable paper batteryScientific Reports
-
7월26일
Physics: Slab avalanche origin similar to that of earthquakesNature Physics
-
7월13일
Planetary science: Origins of one of the oldest martian meteorites identifiedNature Communications
-
7월12일
Astronomy: Casualty risk from uncontrolled rocket re-entries assessedNature Astronomy
-
7월12일
Physics: Beam vibrations used to measure ‘big G’Nature Physics
-
7월6일
Biotechnology: Mice cloned from freeze-dried somatic cellsNature Communications