Physics – Quantum Physics
Scientific paper
2002-04-24
Quantum Inf.Comput. 3 (2003) 224-228
Physics
Quantum Physics
7 pages, some discussions are omitted to shorten
Scientific paper
Within the framework of relativistic quantum theory, we consider the Einstein-Podolsky-Rosen (EPR) gedanken-experiment in which measurements of the spin are performed by moving observers. We find that the perfect anti-correlation in the same direction between the EPR pair no longer holds in the observers' frame. This does not imply a breakdown of the non-local correlation. We explicitly show that the observers must measure the spin in appropriately chosen different directions in order to observe the perfect anti-correlation. This fact should be taken into account in utilizing the entangled state in quantum communication by moving observers.
Terashima Hiroaki
Ueda Masahito
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