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Quantum Fluctuation… M.S. Mousavi Karimi (193

               ground       state    is     the       antiparticle  couples  were
               amplitude  for  the  Universe          created during the quantum

               to  appear  from  nothing”.            fluctuations  from  the  very
               (Hartle and Hawking, 1983:             zero  energy.  (Hawking,
               2961)                                  1997: 143-4)

                  But what properties does               So, if the sum of the total
               the  ground  state  of  the            energies  of  the  universe  is
               Hawking-Hartle model have?             zero,  then  the  creation  of

                  The given answer is: “In            matter  from  pure  energy
               the  quantum  mechanics  of            (i.e:  The  emergence  of  the
               closed universes we do not             universe),  is  a  type  of

               expect  to  find  a  notion  of        creatio ex nihilo.
               ground  state  as  a  state  of           The Hawking-Hartle model,
               lowest energy... In a certain          like  the  others  that  have

               sense the total energy for a           attempted  to  describe  the
               closed  universe  is  always           materialization       of     the
               zero;     The     gravitational        universe  from  nothing,  is
               energy canceling the matter            highly     speculative      and

               energy”.       (Hartle      and        without experimental evidence.
               Hawking, 1983: 2961)                   In  effect,  this  model  “is ad
                  In  other  words,  since  at        hoc in the sense that it does

               the  initial  singularity,  the        not  flow  from  a  more
               total  sum  of  the  positive          comprehensive  unification
               energy of the motion or the            of      general       relativity

               matter  and  the  negative             quantum theory”. (Halvorson
               gravitational energy matched           and Kragh, 2021)
               zero,       the        particle-
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