In quantum cosmology, we treat the universe as a single, closed quantum system, so any initial or final state must be viewed as a component of the fundamental probability assignment.

Appearance is one thing, but reality is another. The world does not appear to be a hologram, but maybe it is. Thus begins ...

This is the fundamental quantum unit of distance, and is around 10 20 times smaller than a proton. In these extremely curved regions, the classical theory of gravity – Einstein’s general theory of ...

I've long been fascinated by the fundamental mystery of our universe's origin. In my work, I explore an alternative to the traditional singularity-based models of cosmology. Instead of a universe ...

There are new hints that the fabric of space-time may be made of "memory cells" that record the whole history of the universe. If true, it could explain the nature of dark matter and much more ...

This formula describes the quantum state of a black hole in thermal equilibrium, with the matter falling into it counterbalanced by the Hawking radiation it emits. By the ’80s Hartle had turned to ...

The goal of quantum cosmology is to devise and apply a quantum theory of gravity to the en­­tire universe. Quantum cosmology is not for the faint of heart.

A new theory of quantum gravity, which attempts to unite quantum physics with Einstein's relativity, could help solve the puzzle of the universe's expansion, a theoretical paper suggests.

According to Kumar, his universe–anti-universe model has implications beyond just the birth of our universe—as it may shine fresh light on several long-standing cosmological puzzles.

And he became known as the father of quantum cosmology,” Horowitz said. Perhaps Hartle’s most famous paper came out in 1983. In collaboration with Hawking, he introduced a wavefunction to ...