Incomplete. the nothing he is referring to is Quantum nothingness at xero point energy, and the gravity the is referring to is Quantum Gravity.
We have been here several times before like throwing a dog a ball, It always seems to come back.
The key to understanding the origin and fate of the universe may be a more complete understanding of the vacuum.
www.quantamagazine.org
Quantum Nothingness
Nothing started to seem like something in the 20th century, as physicists came to view reality as a collection of fields: objects that fill space with a value at each point (the electric field, for instance, tells you how much force an electron will feel in different places). In classical physics, a field’s value can be zero everywhere so that it has no influence and contains no energy. “Classically, the vacuum is boring,” said
Daniel Harlow, a theoretical physicist at the Massachusetts Institute of Technology. “Nothing is happening.”
But physicists learned that the universe’s fields are quantum, not classical, which means they are inherently uncertain. You’ll never catch a quantum field with exactly zero energy. Harlow likens a quantum field to an array of pendulums — one at each point in space — whose angles represent the field’s values. Each pendulum hangs nearly straight down but jitters back and forth.
Left alone, a quantum field will stay in its minimum-energy configuration, known as its “true vacuum” or “ground state.” (
Elementary particles are ripples in these fields.) “When we talk about the vacuum of a system, we have in mind in some loose way the preferred state of the system,” said Garcia Garcia.
Most of the quantum fields that fill our universe have one, and only one, preferred state, in which they’ll remain for eternity. Most, but not all.