ENTANGLEMENT SWAPPING FOR TWO PAIRS OF EPR EIGENSTATES GENERATED VIA BELL MEASUREMENT
Hong-Yi Fan
We demonstrate that a common eigenvector |η> (Einstein, Podolsky and Rosen, EPR states) of two particles' relatively coordinate and total momentum possesses a property that the projection (a Bell measurement) of two pairs of EPR states |η>1,2⊗| η'>3,4 onto the subspace spanned by 1,4<η″|, yields a EPR state |η″-η*-η′* >2,3 for particles 2 and 3. Entanglement swapping operator is also derived by virtue of the technique of integration within an ordered product of operators.
Modern Physics Letters B•Feb 10, 2001•0 citations