Quantum string cosmology. (arXiv:2101.01070v2 [gr-qc] UPDATED)
<a href="http://arxiv.org/find/gr-qc/1/au:+Gasperini_M/0/1/0/all/0/1">M. Gasperini</a>
We present a short review of possible applications of the Wheeler-De Witt
equation to cosmological models based on the low-energy string effective
action, and characterised by an initial regime of asymptotically flat, low
energy, weak coupling evolution. Considering in particular a class of
duality-related (but classically disconnected) background solutions, we shall
discuss the possibility of quantum transitions between the phases of pre-big
bang and post-big bang evolution. We will show that it is possible, in such a
context, to represent the birth of our Universe as a quantum process of
tunneling or “anti-tunneling” from an initial state asymptotically approaching
the string perturbative vacuum.
We present a short review of possible applications of the Wheeler-De Witt
equation to cosmological models based on the low-energy string effective
action, and characterised by an initial regime of asymptotically flat, low
energy, weak coupling evolution. Considering in particular a class of
duality-related (but classically disconnected) background solutions, we shall
discuss the possibility of quantum transitions between the phases of pre-big
bang and post-big bang evolution. We will show that it is possible, in such a
context, to represent the birth of our Universe as a quantum process of
tunneling or “anti-tunneling” from an initial state asymptotically approaching
the string perturbative vacuum.
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