506 citations · 2.1k across the 75 of their papers we have counts for
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Primordial spectra from modified Bekenstein-Hawking entropy law
Marco de Cesare, Giulia Gubitosi, Varun Kushwaha
Many approaches to quantum gravity predict logarithmic corrections to the Bekenstein-Hawking entropy. Within the spacetime-thermodynamic description of gravity, such corrections le…
DSR-relativistic spacetime picture and the phenomenology of Planck-scale-modified time dilation
Giovanni Amelino-Camelia, Giulia Gubitosi, Pietro Pellecchia +2
The most active area of research in quantum-gravity phenomenology investigates the possibility of Planck-scale-modified dispersion relations, focusing mainly on two alternative sce…
Redshift leverage for the search of GRB neutrinos affected by quantum properties of spacetime
Giovanni Amelino-Camelia, Giacomo D'Amico, Vittorio D'Esposito +6
Some previous studies based on IceCube neutrinos had found intriguing preliminary evidence that some of them might be GRB neutrinos with travel times affected by quantum properties…
Cosmological evolution from modified Bekenstein entropy law
Marco de Cesare, Giulia Gubitosi
We study the dynamics of the homogeneous and isotropic cosmological background in the recently proposed ``quantum phenomenological gravitational dynamics'', characterised by logari…
Phenomenology of DSR-relativistic in-vacuo dispersion in FLRW spacetime
Giovanni Amelino-Camelia, Domenico Frattulillo, Giulia Gubitosi +2
Studies of in-vacuo dispersion are the most active area of quantum-gravity phenomenology. The way in which in-vacuo dispersion produces redshift-dependent corrections to the time o…
Could quantum gravity slow down neutrinos?
Giovanni Amelino-Camelia, Maria Grazia Di Luca, Giulia Gubitosi +2
In addition to its implications for astrophysics, the hunt for GRB neutrinos could also be significant in quantum-gravity research, since they are excellent probes of the microscop…
Fundamental decoherence from quantum spacetime
Michele Arzano, Vittorio D'Esposito, Giulia Gubitosi
We show that quantum properties of spacetime, encoded by noncommutativity at the Planck scale, lead to a generalized time evolution of quantum systems in which pure states can evol…
Interplay between spacetime curvature, speed of light and quantum deformations of relativistic symmetries
Angel Ballesteros, Giulia Gubitosi, Flavio Mercati
Recent work showed that -deformations can describe the quantum deformation of several relativistic models that have been proposed in the context of quantum gravity phenomenology…
Life of cosmological perturbations in MDR models, and the prospect of travelling primordial gravitational waves
Giulia Gubitosi, Joao Magueijo
We follow the life of a generic primordial perturbation mode (scalar or tensor) subject to modified dispersion relations (MDR), as its proper wavelength is stretched by expansion.…
Relativistic compatibility of the interacting -Poincaré model and implications for the relative locality framework
Giulia Gubitosi, Sjors Heefer
We investigate the relativistic properties under boost transformations of the -Poincaré model with multiple causally connected interactions, both at the level of its formulation…
Scales and hierachies in asymptotically safe quantum gravity: a review
Frank Saueressig, Giulia Gubitosi, Chris Ripken
The asymptotic safety program strives for a consistent description of gravity as a non-perturbatively renormalizable quantum field theory. In this framework the gravitational inter…
Quantum Gravity phenomenology and metric formalism
Niccoló Loret, Leonardo Barcaroli, Giulia Gubitosi
In this proceedings for the MG14 conference, we discuss the construction of a phenomenology of Planck-scale effects in curved spacetimes, underline a few open issues and describe s…
Parity at the Planck scale
Michele Arzano, Giulia Gubitosi, Joao Magueijo
We explore the possibility that well known properties of the parity operator, such as its idempotency and unitarity, might break down at the Planck scale. Parity might then do more…
Primordial standing waves
Giulia Gubitosi, Joao Magueijo
We consider the possibility that the primordial fluctuations (scalar and tensor) might have been standing waves at their moment of creation, whether or not they had a quantum origi…
Squeezing of scalar and tensor primordial perturbations generated by modified dispersion relations
Giulia Gubitosi, Joao Magueijo
In recent work we analyzed the evolution of primordial perturbations satisfying Planck-scale-modified dispersion relations and showed that there is no cosmological "squeezing" in t…
The phenomenology of squeezing and its status in non-inflationary theories
Giulia Gubitosi, Joao Magueijo
In this paper we skim the true phenomenological requirements behind the concept of inflationary squeezing. We argue that all that is required is that at horizon re-entry the fluctu…
Curved spacetimes with local -Poincaré dispersion relation
Leonardo Barcaroli, Lukas K. Brunkhorst, Giulia Gubitosi +2
We use our previously developed identification of dispersion relations with Hamilton functions on phase space to locally implement the -Poincaré dispersion relation in the momen…
Primordial perturbations in a rainbow universe with running Newton constant
Francesco Brighenti, Giulia Gubitosi, Joao Magueijo
We compute the spectral index of primordial perturbations in a rainbow universe. We allow the Newton constant to run at (super-)Planckian energies and we consider both vacuum a…
Planck-scale-modified dispersion relations in homogeneous and isotropic spacetimes
Leonardo Barcaroli, Lukas K. Brunkhorst, Giulia Gubitosi +2
The covariant understanding of dispersion relations as level sets of Hamilton functions on phase space enables us to derive the most general dispersion relation compatible with hom…
Correlation between opposite-helicity gravitons: Imprints on gravity-wave and microwave backgrounds
Giulia Gubitosi, Joao Magueijo
We examine some of the roots of parity violation for gravitons and uncover a closely related new effect: correlations between right and left handed gravitons. Such correlators have…
Kinematics of particles with quantum de Sitter symmetries
Leonardo Barcaroli, Giulia Gubitosi
We present the first detailed study of the kinematics of free relativistic particles whose symmetries are described by a quantum deformation of the de Sitter algebra, known as -…
Reappraisal of a model for deformed special relativity
Giulia Gubitosi, Joao Magueijo
We revisit one of the earliest proposals for deformed dispersion relations in the light of recent results on dynamical dimensional reduction and production of cosmological fluctuat…
Quantization of fluctuations in DSR: the two-point function and beyond
Giulia Gubitosi, Michele Arzano, Joao Magueijo
We show that the two-point function of a quantum field theory with de Sitter momentum space (herein called DSR) can be expressed as the product of a standard delta function and an…
Hamilton geometry: Phase space geometry from modified dispersion relations
Leonardo Barcaroli, Lukas K. Brunkhorst, Giulia Gubitosi +2
We describe the Hamilton geometry of the phase space of particles whose motion is characterised by general dispersion relations. In this framework spacetime and momentum space are…