Quantum particle-pair creation effect on spacetime

[CosmologyHobbyist]

I am curious as to whether quantum particle-pair creation could be responsible for cosmological inflation.

Question 1: Is there any theory about quantum particle-pair creation effect on local space-time? Obviously, where a particle exists there is gravitation, where no particle exists there is no gravitation. Quantum particle-pair creation must have some impact on the gravitational field and space-time. If gravity and space-time are equivilent, does particle-pair creation mean local spacetime expansion? Or is gravity and spacetime not as tightly related as I am supposing?

Question 2: Is neutrino/anti-neutrino a valid candidate for quantum particle-pair creation? I only find electron/positron pairs mentioned in articles about quantum particle-pair creation. Perhaps there is there a reason that the quantum field does not create neutrino/anti-neutrino pairs?

Question 3: For particle-pair creation to inflate the universe, very long-lived particles are required. Obviously electron/positron pairs would attracte and annihilate each other quickly. I thought maybe neutrino/antineutrino pairs might survive longer. However, none of this idea works if the neutrino has a short half-life. Is there any information available on the half-life of the neutrino or anti-neutrino?

 

[azntoon]

Answer: While there is no known theory that directly connects quantum particle-pair creation to cosmological inflation, the idea can be explored in more detail. Regarding question 1, gravity and spacetime are related but not necessarily equivalent. In general relativity, the effects of gravity on spacetime can be thought of as curvature in a four-dimensional spacetime continuum. Thus, quantum particle-pair creation could potentially have some effect on local spacetime, but this has yet to be studied in detail. For question 2, neutrinos and anti-neutrinos are indeed possible candidates for quantum particle-pair creation. In fact, it has been theorized that neutrino oscillations may be behind the phenomenon of dark energy. It is unclear, however, whether the particle-pair creation of neutrinos and anti-neutrinos would have any direct effect on cosmological inflation.Finally, regarding question 3, the half-life of the neutrino is unknown, but it is believed to be very long (on the order of billions of years). While this suggests that neutrino/anti-neutrino pairs could potentially exist for a long time, it is still unclear whether they could contribute to cosmological inflation.