The hydrodynamics of quantum fluids can be mapped to relativistic cosmological dynamics, and both share the same conformal symmetries, which can be unraveled via geometric methods in superspace. This suggests a more general correspondence between hydrodynamics and cosmology, and a picture of the universe as a quantum gravity condensate. This picture is in fact realized also in some quantum gravity formalisms, like group field theory and lattice gravity, in which an emergent cosmological dynamics can be extracted from the quantum dynamics of fundamental quantum simplices in a condensate phase.
A key ingredient is the relational understanding of space and time, which makes superspace the natural arena for gravitational dynamics, as opposed to the "spacetime" manifold. These results suggest an exciting dialogue between quantum gravity, the theory of quantum fluids and cosmology, as well as a new direction for analogue gravity simulations in the lab.
By Maïté Dupuis
By Johannes Thürigen
By Antônio Duarte Pereira
By Sumati Surya
By Riccardo Martini
By Raimar Wulkenhaar
By Valentin Bonzom
By Gaëtan Borot
By Timothy Budd
By Jan Ambjorn
By Laurent Baulieu
By François David
By Reiko Toriumi
By Thomas Krajewski
By Simone Speziale
By Marc Levine
By Claudio Dappiaggi
By Ronnie Pavlov
By Tamara Kucherenko
