From: seki.hajime01@gmail.com   
      
   On Wednesday, May 2, 2018 at 8:17:16 PM UTC+9, Jos Bergervoet wrote:   
   > On 5/2/2018 6:33 AM, Robert L. Oldershaw wrote:   
   > > On Tuesday, May 1, 2018 at 4:41:53 PM UTC-4, SEKI wrote:   
   > >> Hawking radiation postulates that particles with negative energy   
   > >> fall into a black hole.   
   >   
   > It does not postulate anything, it is just a term for a certain   
   > kind of radiation, that can be derived using field theory in the   
   > curved space around a black hole (you may claim that quantum field   
   > theory and the theory of curved space are containing postulates,   
   > but if so, the term Hawking radiation cannot be blamed for that).   
   >   
   > >> Einstein's gravitational equation is presented in terms of linear   
   > >> expression of energy-momentum tensor.   
   > >> So, I suppose that particles with negative energy, if actually   
   > >> present,   
   >   
   > They are not present in quantum field theory.   
      
   You wrote "...it is just a term for a certain kind of radiation,   
   that can be derived using field theory..."   
   Without the assumption that particles with negative energy fall   
   into a black hole, how is the radiation derived using field theory?   
      
   Thank you in advance.   
      
   SEKI   
      
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