5 papers
Emergent dark sector in group field theory cosmology
Andrea Calcinari, Federico Greco, Daniele Oriti +1
We develop an analytical treatment of the emergent cosmological dynamics induced by local polynomial interactions in a deparametrised group field theory model, moving beyond the us…
Gauge vs (hidden) physical symmetries of FLRW cosmologies
Andrea Calcinari, Adrià Delhom, Federico Greco +2
In generally covariant theories evolution in coordinate time is a gauge transformation, so that a symmetry made manifest in a gauge-fixed description need not be a symmetry of the…
Collective excitations in quantum gravity condensates
Andrea Calcinari, Adrià Delhom, Daniele Oriti
A central open problem in quantum gravity is to understand how continuum spacetime emerges from quantum-geometric degrees of freedom in a background-independent setting. A many-bod…
Relational dynamics and Page-Wootters formalism in group field theory
Andrea Calcinari, Steffen Gielen
Group field theory posits that spacetime is emergent and is hence defined without any background notion of space or time; dynamical questions are formulated in relational terms, in…
Twisted Geometries Coherent States for Loop Quantum Gravity
Andrea Calcinari, Laurent Freidel, Etera Livine +1
We introduce a new family of coherent states for loop quantum gravity, inspired by the twisted geometry parametrization. We compute their peakedness properties and compare them wit…