On Monday, February 26, 2018 at 10:58:46 PM UTC-6, Tom Roberts wrote:   
   > On 2/26/18 9:05 AM, richalivingston@gmail.com wrote:   
   > > [treating the null interval between emission and detection literally]   
   >   
   > But one can have entanglement for massive particles, for which the   
   > interval between emission and detection is not zero.   
   >   
   > Note also that entanglement does not involve "the nonsense of one   
   > detector determining, instantaneously, the result at a detector outside   
   > its lightcone", it only yields a CORRELATION between detectors' results.   
   >   
   > Tom Roberts   
      
   Both very true points, and I don't have a strong answer to them.  I do wonder,   
   however, if there is a similar effect for massive particles.  After all,   
   if either of the massive particles is observed (interacts with a photon or   
   other particle) then the entanglement is broken/not observed.  In quantum   
   mechanics can we really say anything about what happens between interactions   
   (emission, absorbtion or scattering)?   
      
   Rich L.   
      
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