Entangled quantum clocks for measuring proper-time difference

W. Y. Hwang, D. Ahn, S. W. Hwang, Y. D. Han

Research output: Contribution to journalArticlepeer-review


We report that entangled pairs of quantum clocks (non-degenerate quantum bits) can be used as a specialized detector for precisely measuring difference of proper-times that each constituent quantum clock experiences. We describe why the proposed scheme would be more precise in the measurement of proper-time difference than a scheme of two-separate-quantum-clocks. We consider possibilities that the proposed scheme can be used in precision test of the relativity theory.

Original languageEnglish
Pages (from-to)129-132
Number of pages4
JournalEuropean Physical Journal D
Issue number1
StatePublished - Apr 2002


  • 03.67.-a Quantum information
  • 04.80.Cc Experimental tests of gravitational theories
  • 06.30.Ft Time and frequency


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