That’s because those gravitational wave results point to a particularly prolific and potent kind of “Inflation” of the early universe, an exponential expansion of the dimensions of space to many times the size of our own cosmos in the first fraction of a second of the Big Bang, some 13.82 billion years ago.
Essentially, in the models favored by the BICEP2 team’s observations, the process that inflates a universe looks just too potent to happen only once; rather, once a Big Bang starts, the process would happen repeatedly and in multiple ways.
The Big Bang and inflation make the universe look like the ultimate free lunch, Guth has suggested, where we have received something for nothing.
That means every kind of cosmos is out there in the aftermath of the Big Bang, from our familiar universe chock full of stars and planets to extravaganzas that encompass many more dimensions, but are devoid of such mundane things as atoms or photons of light.
In this multiverse spawned by “Chaotic” inflation, the Big Bang is just a starting point, giving rise to multiple universes separated by unimaginable gulfs of distance.
There is the 1998 discovery that galaxies in our universe seem to be spreading apart at an accelerating rate, when their mutual gravitational attraction should be slowing them down.
On the bell curve of all possible universes spawned by inflation, our universe might just happen to be one of the few universes in which the dark energy is relatively lame.