Quantum gravity aims at a radical new understanding of the nature of space and time. The

quantum description of continuum space-time geometry, the most direct implication of a

quantization of the gravitational field, would already represent a big challenge to traditional

notions of space and time. Many modern approaches go beyond this by proposing as

fundamental constituents of space-time structures that are discrete and/or non-geometric in

nature. If the fundamental structures of quantum gravity are not spatio-temporal, space and

time are necessarily â€˜emergentâ€™ notions. The first subject of the workshop will be the notion

of the emergence of space and time in various quantum gravity approaches.

The pre-geometric building blocks of such emergent spacetime would be subject to

quantum mechanical laws, in particular quantum entanglement. Emergent spacetime

scenarios in quantum gravity are therefore also the natural setting to explore the idea that

quantum entanglement (and other tools of quantum information) is the key for the very

emergence of geometry, and the texture of spacetime itself, the second idea the workshop

will focus on.

Quantum gravity effects are expected to become important in the very early universe and in

particular to resolve the initial big-bang singularity. The cosmological sector of quantum

gravity is also particularly interesting to explore due to the possibility that quantum gravity

effects could potentially be tested via high precision observations of the cosmic microwave

background. The third topic of the workshop concerns the quantum nature of the early

universe and in particular the role that the emergence of space-time may play in various

cosmological models of the early universe, both with respect to singularity resolution and

structure formation.

If understood as a physical process (possibly in the form of a phase transition), the

emergence of time and space in quantum gravity could also be tentatively linked with the

very initial stage of cosmological evolution as the quantum process that replaces the

cosmological big bang singularity in quantum gravity. This may suggest a radical new

description of early cosmology. The possible cosmological nature of the emergence of time

and space and its conceptual and phenomenological consequences will be the fourth focus

of the workshop.