Amelino-Camelia, Giovanni, Laemmerzahl, Claus, Mercati, Flavio, Tino, Guglielmo M.
We use the results of ultra-precise cold-atom-recoil experiments to constrain the form of the energy-momentum dispersion relation, a structure that is expected to be modified in several...
Rayleigh-Ritz Variational Approximation and Symmetry Nonrestoration (2009)
The investigation of symmetry nonrestoration scenarios has led to a controversy, with certain nonperturbative approximation schemes giving indications in sharp disagreement with those found within...
Prospects for constraining quantum gravity dispersion with near term observations (2009)
Amelino-Camelia, Giovanni, Smolin, Lee
We discuss the prospects for bounding and perhaps even measuring quantum gravity effects on the dispersion of light using the highest energy photons produced in gamma ray bursts measured by the Fermi...
Planck-scale effects for Chandrasekhar model and TOV equations (2009)
Amelino-Camelia, Giovanni, Loret, Niccolo', Mandanici, Gianluca, Mercati, Flavio
In a recent paper by Camacho a class of Planck-scale effects that is of interest from a quantum-gravity perspective was studied within the framework of the Chandrasekhar model of white dwarfs, also...
A Constraint on Planck-scale Modifications to Electrodynamics with CMB polarization data (2009)
Gubitosi, Giulia, Pagano, Luca, Amelino-Camelia, Giovanni, Melchiorri, Alessandro, Cooray, Asantha
We show that the Cosmic Microwave Background (CMB) polarization data gathered by the BOOMERanG 2003 flight and WMAP provide an opportunity to investigate {\it in-vacuo} birefringence, of a type...
Discreteness of area in noncommutative space (2008)
Amelino-Camelia, Giovanni, Gubitosi, Giulia, Mercati, Flavio
We introduce an area operator for the Moyal noncommutative plane. We find that the spectrum is discrete, but, contrary to the expectation formulated by other authors, not characterized by a...
Amelino-Camelia, Giovanni, Gubitosi, Giulia, Mercati, Flavio
Motivation for the study of spacetime noncommutativity comes primarily from its possible use in investigations of (Planck-scale) spacetime fuzziness, but most work focuses on S-matrix/field-theory...
Quantum Gravity Phenomenology (2008)
I review the present status of the development of Quantum Gravity Phenomenology. Among the accomplishments of this young research area I stress in particular the significance of studies which...
First results of the Noether theorem for Hopf-algebra spacetime symmetries (2007)
Amelino-Camelia, Giovanni, Gubitosi, Giulia, Marciano, Antonino, Martinetti, Pierre, Mercati, Flavio, Pranzetti, Daniele, ...
We summarize here the first results obtained using a technique we recently developed for the Noether analysis of Hopf-algebra spacetime symmetries, including the derivation of conserved charges for...
A cyclic integral on k-Minkowski noncommutative space-time (2007)
Agostini, Alessandra, Amelino-Camelia, Giovanni, Arzano, Michele, D'Andrea, Francesco
We examine some alternative possibilities for an action functional for $\kappa$-Minkowski noncommutative spacetime, with an approach which should be applicable to other spacetimes with...
Amelino-Camelia, Giovanni, Briscese, Fabio, Gubitosi, Giulia, Marciano, Antonino, Martinetti, Pierre, Mercati, Flavio
We study the twisted-Hopf-algebra symmetries of observer-independent canonical spacetime noncommutativity, for which the commutators of the spacetime coordinates take the form [x^{mu},x^{nu}]=i...
Amelino-Camelia, Giovanni, Marciano, Antonino, Pranzetti, Daniele
We perform a Noether analysis for a description of translation transformations in 4D $\kappa$-Minkowski noncommutative spacetime which is based on the structure of a 5D differential calculus. The...
A no-pure-boost uncertainty principle from spacetime noncommutativity (2007)
Amelino-Camelia, Giovanni, Gubitosi, Giulia, Marcianó, Antonino, Martinetti, Pierre, Mercati, Flavio
We study boost and space-rotation transformations in kappa-Minkowski noncommutative spacetime, using the techniques that some of us had previously developed (hep-th/0607221) for a description of...
Generalizing the Noether theorem for Hopf-algebra spacetime symmetries (2006)
Agostini, Alessandra, Amelino-Camelia, Giovanni, Arzano, Michele, Marcianó, Antonino, Tacchi, Ruggero Altair
Over these past few years several quantum-gravity research groups have been exploring the possibility that in some Planck-scale nonclassical descriptions of spacetime one or another form of...
"Doubly-special relativity" (DSR), the idea of a Planck-scale Minkowski limit that is still a relativistic theory, but with both the Planck scale and the speed-of-light scale as nontrivial...
Amelino-Camelia, Giovanni, Arzano, Michele, Ling, Yi, Mandanici, Gianluca
In several approaches to the quantum-gravity problem evidence has emerged of the validity of a "GUP" (a Generalized position-momentum Uncertainty Principle) and/or a "MDR" (a modification of the...
Exotic Acceleration Processes and Fundamental Physics (2005)
Gamma-ray bursts and ultra-high-energy cosmic rays provide an important testing ground for fundamental physics. A simple-minded analysis of some gamma-ray bursts would lead to a huge estimate of the...
Amelino-Camelia, Giovanni, Arzano, Michele, Procaccini, Andrea
An insightful argument for a linear relation between the entropy and the area of a black hole was given by Bekenstein using only the energy-momentum dispersion relation, the uncertainty principle,...
Introduction to Quantum-Gravity Phenomenology (2004)
After a brief review of the first phase of development of Quantum-Gravity Phenomenology, I argue that this research line is now ready to enter a more advanced phase: while at first it was legitimate...
Planck-scale Lorentz-symmetry test theories (2004)
In the recent quantum-gravity literature there has been strong interest in the possibility of Planck-scale departures from Lorentz symmetry, including possible modifications of the energy/momentum...
Action functional for kappa-Minkowski Noncommutative Spacetime (2004)
Agostini, Alessandra, Amelino-Camelia, Giovanni, Arzano, Michele, D'Andrea, Francesco
We examine some alternative possibilities for an action functional for $\kappa$-Minkowski noncommutative spacetime, with an approach which should be applicable to other spacetimes with...
Amelino-Camelia, Giovanni, Arzano, Michele, Procaccini, Andrea
We explore a possible connection between two aspects of Loop Quantum Gravity which have been extensively studied in the recent literature: the black-hole area-entropy law and the energy-momentum...
Some encouraging and some cautionary remarks on Doubly Special Relativity in Quantum Gravity (2004)
The idea of a role for DSR (doubly-special relativity) in quantum gravity finds some encouragement in a few scenarios, but in order to explore some key conceptual issues it is necessary to find a...
A perspective on Quantum Gravity Phenomenology (2004)
I give a brief overview of some Quantum-Gravity-Phenomenology research lines, focusing on studies of cosmic rays and gamma-ray bursts that concern the fate of Lorentz symmetry in quantum spacetime. I...
Phenomenology of Doubly Special Relativity (2003)
Amelino-Camelia, Giovanni, Kowalski-Glikman, Jerzy, Mandanici, Gianluca, Procaccini, Andrea
Investigations of the possibility that some novel ``quantum" properties of spacetime might induce a modification dispersion relation focused at first on scenarios with Planck-scale violations of...
D-particles and the localization limit in quantum gravity (2003)
Amelino-Camelia, Giovanni, Doplicher, Luisa
Some recent studies of the properties of D-particles suggest that in string theory a rather conventional description of spacetime might be available up to scales that are significantly smaller than...
Planck-scale structure of spacetime and some implications for astrophysics and cosmology (2003)
I briefly review some scenarios for the role of the Planck length in quantum gravity. In particular, I examine the differences between the schemes in which quantum gravity is expected to introduce a...
Quantum Gravity Phenomenology (2003)
I give a brief non-technical review of "Quantum Gravity Phenomenology" and in particular I describe some studies which should soon allow to establish valuable data-based constraints on the...
Each approach to the quantum-gravity problem originates from expertise in one or another area of theoretical physics. The particle-physics perspective encourages one to attempt to reproduce in...
Fundamental physics in space: a Quantum-Gravity perspective (2003)
I consider the possibility that space experiments be used to search for quantum properties of spacetime. On the basis of recent quantum-gravity results, I argue that insight on some quantum...
Implications of Spacetime Quantization for the Bahcall-Waxman Neutrino Bound (2003)
Amelino-Camelia, Giovanni, Arzano, Michele, NG, Y. Jack, Piran, Tsvi, Van Dam, Hendrik
There is growing interest in quantum-spacetime models in which small departures from Lorentz symmetry are governed by the Planck scale. In particular, several studies have considered the possibility...
Quantum symmetry, the cosmological constant and Planck scale phenomenology (2003)
Amelino-Camelia, Giovanni, Smolin, Lee, Starodubtsev, Artem
We present a simple algebraic argument for the conclusion that the low energy limit of a quantum theory of gravity must be a theory invariant, not under the Poincare group, but under a deformation of...
Quantum-gravity-motivated Lorentz-symmetry tests with laser interferometers (2003)
Amelino-Camelia, Giovanni, Lammerzahl, Claus
We consider the implications for laser interferometry of the quantum-gravity-motivated modifications in the laws of particle propagation, which are presently being considered in attempts to explain...
Hopf-algebra description of noncommutative-spacetime symmetries (2003)
Agostini, Alessandra, Amelino-Camelia, Giovanni, D'Andrea, Francesco
In the study of certain noncommutative versions of Minkowski spacetime there is still a large ambiguity concerning the characterization of their symmetries. Adopting as our case study the...
Over the last few years the study of possible Planck-scale departures from classical Lorentz symmetry has been one of the most active areas of quantum-gravity research. We now have a satisfactory...
In the quantum-gravity literature there has been interest in the possibility that quantum properties of spacetime might affect the energy/momentum dispersion relation. The most used test theory for...
Group velocity in noncommutative spacetime (2002)
Amelino-Camelia, Giovanni, D'Andrea, Francesco, Mandanici, Gianluca
The realization that forthcoming experimental studies, such as the ones planned for the GLAST space telescope, will be sensitive to Planck-scale deviations from Lorentz symmetry has increased...
Doubly-Special Relativity: First Results and Key Open Problems (2002)
I examine the results obtained so far in exploring the recent proposal of theories of the relativistic transformations between inertial observers that involve both an observer-independent velocity...
Amelino-Camelia, Giovanni, Mandanici, Gianluca, Yoshida, Kensuke
We investigate some issues that are relevant for the derivation of experimental limits on the parameters of canonical noncommutative spacetimes. By analyzing a simple Wess-Zumino-type model in...
Among the possible explanations for the puzzling observations of cosmic rays above the GZK cutoff there is growing interest in the ones that represent kinematical solutions, based either on general...
Doubly Special Relativity (2002)
I give a short non-technical review of the results obtained in recent work on "Doubly Special Relativity", the relativistic theories in which the rotation/boost transformations between inertial...
Dirac spinors for Doubly Special Relativity and $\kappa$-Minkowski noncommutative spacetime (2002)
Agostini, Alessandra, Amelino-Camelia, Giovanni, Arzano, Michele
We construct a Dirac equation that is consistent with one of the recently-proposed schemes for a "doubly-special relativity", a relativity with both an observer-independent velocity scale (still...
On the fate of Lorentz symmetry in loop quantum gravity and noncommutative spacetimes (2002)
I analyze the deformation of Lorentz symmetry that holds in certain noncommutative spacetimes and the way in which Lorentz symmetry is broken in other noncommutative spacetimes. I also observe that...
Field Theories on Canonical and Lie-Algebra Noncommutative Spacetimes (2002)
Amelino-Camelia, Giovanni, Arzano, Michele, Doplicher, Luisa
Field theories on canonical noncommutative spacetimes, which are being studied also in connection with string theory, and on $\kappa$-Minkowski spacetime, which is a popular example of Lie-algebra...
Amelino-Camelia, Giovanni, NG, Y. Jack, Van Dam, Hendrik
A growing number of studies is being devoted to the identification of plausible quantum properties of spacetime which might give rise to observably large effects. The literature on this subject is...
Quantum-Gravity Phenomenology: Status and Prospects (2002)
Over the last few years part of the quantum-gravity community has adopted a more optimistic attitude toward the possibility of finding experimental contexts providing insight on non-classical...
Amelino-Camelia, Giovanni, Benedetti, Dario, D'Andrea, Francesco, Procaccini, Andrea
We consider the two most studied proposals of relativity theories with observer-independent scales of both velocity and length/mass: the one discussed by Amelino-Camelia as illustrative example for...
Quantum-gravity phenomenology with gamma rays and UHE cosmic rays (2002)
In recent years several ideas for experimental searches of effects induced by quantum properties of space-time have been discussed. Some of these ideas concern the role in quantum spacetime of the...
Quantum Space-Time: Deformed Symmetries Versus Broken Symmetries (2002)
Several recent studies have concerned the faith of classical symmetries in quantum space-time. In particular, it appears likely that quantum (discretized, noncommutative,...) versions of Minkowski...
Amelino-Camelia, Giovanni, Doplicher, Luisa, Nam, Soonkeon, Seo, Yun-Seok
We outline a phenomenological programme for the search of effects induced by (string-motivated) canonical noncommutative spacetime. The tests we propose are based, in analogy with a corresponding...
Space-time quantum solves three experimental paradoxes (2001)
I show that a Planck-scale deformation of the relativistic dispersion relation, which has been independently considered in the quantum-gravity literature, can explain the surprising results of three...
Status of Relativity with observer-independent length and velocity scales (2001)
I have recently shown that it is possible to formulate the Relativity postulates in a way that does not lead to inconsistencies in the case of space-times whose structure is governed by...
Observed threshold anomalies as the first hope of a manifestation of Planck-length physics (2001)
The observations of photons from the BL Lac object Mk501 with energies above 10 TeV and of cosmic rays with energies above the GZK threshold appear to be inconsistent with conventional theories....
Coproduct and star product in field theories on Lie-algebra non-commutative space-times (2001)
Amelino-Camelia, Giovanni, Arzano, Michele
We propose a new approach to field theory on $\kappa$-Minkowski non-commutative space-time, a popular example of Lie-algebra space-time. Our proposal is essentially based on the introduction of a...
A phenomenological description of quantum-gravity-induced space-time noise (2001)
I propose a phenomenological description of space-time foam and discuss the experimental limits that are within reach of forthcoming experiments.
Phenomenological description of space-time foam (2001)
The expectation that it should not be possible to gain experimental insight on the structure of space-time at Planckian distance scales has been recently challenged by several studies. With respect...
Testable scenario for Relativity with minimum-length (2000)
I propose a general class of space-times whose structure is governed by observer-independent scales of both velocity ($c$) and length (Planck length), and I observe that these space-times can...
Quantum theory's last challenge (2000)
Quantum mechanics is now 100 years old and still going strong. Combining general relativity with quantum mechanics is the last hurdle to be overcome in the "quantum revolution".
I show that it is possible to formulate the Relativity postulates in a way that does not lead to inconsistencies in the case of space-times whose short-distance structure is governed by an...
Amelino-Camelia, Giovanni, Piran, Tsvi
One of the most puzzling current experimental physics paradoxes is the arrival on Earth of Ultra High Energy Cosmic Rays with energies above the GZK threshold. The recent observation of 20TeV photons...
Planck-Length Phenomenology (2000)
This author's recent proposal of interferometric tests of Planck-scale-related properties of space-time is here revisited from a strictly phenomenological viewpoint. The results announced previously...
Cosmic rays and TeV photons as probes of quantum properties of space-time (2000)
Amelino-Camelia, Giovanni, Piran, Tsvi
It has been recently observed that small violations of Lorentz invariance, of a type which may arise in quantum gravity, could explain both the observations of cosmic rays above the GZK cutoff and...
On a possible quantum limit for the stabilization of moduli in brane-world scenarios (2000)
I consider the implications for brane-world scenarios of the rather robust quantum-gravity expectation that there should be a quantum minimum limit on the uncertainty of all physical length scales....
Testing kappa-Poincare' with neutral kaons (2000)
Amelino-Camelia, Giovanni, Buccella, Franco
In recent work on experimental tests of quantum-gravity-motivated phenomenological models, a significant role has been played by the so-called ``$\kappa$'' deformations of Poincar\'e symmetries....
A testable description of space-time foam as a fundamental stochastic gravity-wave background (2000)
I develop a phenomenological approach to the description of the noise levels that the space-time foam of quantum gravity could induce in modern gravity-wave detectors. Various possibilities are...
Are we at the dawn of quantum-gravity phenomenology? (1999)
A handful of recent papers has been devoted to proposals of experiments capable of testing some candidate quantum-gravity phenomena. These lecture notes emphasize those aspects that are most relevant...
On the Salecker-Wigner limit and the use of interferometers in space-time-foam studies (1999)
The recent paper gr-qc/9909017 criticizes the limit on the measurability of distances that was derived by Salecker and Wigner in the 1950s. If justified, this criticism would have important...
Neutral Kaon System in Dense Matter and Heavy-Ion Collisions (1999)
Amelino-Camelia, Giovanni, Kapusta, Joseph
Above a critical matter density the propagating modes of the neutral kaon system are essentially eigenstates of strangeness, but below it they are almost complete eigenstates of CP. We estimate the...
Waves on Noncommutative Spacetime and Gamma-Ray Bursts (1999)
Amelino-Camelia, Giovanni, Majid, Shahn
Quantum group Fourier transform methods are applied to the study of processes on noncommutative Minkowski spacetime $[x^i,t]=\imath\lambda x^i$. A natural wave equation is derived and the associated...
Gravity-wave interferometers as probes of a low-energy effective quantum gravity (1999)
The interferometry-based experimental tests of quantum properties of space-time which the author sketched out in a recent short Letter [Nature 398 (1999) 216] are here discussed in self-contained...
Distance Measurement and $\kappa$-Deformed Propagation of Light and Heavy Probes (1999)
Amelino-Camelia, Giovanni, Lukierski, Jerzy, Nowicki, Anatol
We investigate the implications for the measurability of distances of a covariant dimensionful ``$\kappa$'' deformation of D=4 relativistic symmetries, with quantum time coordinate and modified...
On the Relation between Wilson Action and CJT Effective Action (1998)
Amelino-Camelia, Giovanni, Derendinger, Jean-Pierre
A relation between Wilson action and the Cornwall-Jackiw-Tomboulis effective action, which was recently suggested by Periwal, is here derived using path-integral techniques.
Quantum Mechanics is revisited as the appropriate theoretical framework for the description of the outcome of experiments that rely on the use of classical devices. In particular, it is emphasized...
Could we observe the discreteness of Quantum-Gravity length and area operators ? (1998)
Several proposals for Quantum Gravity involve length and area operators with discrete eigenvalues. I show that the analyses of some simple procedures for the measurement of areas and lengths suggest...
T-duality for boundary-non-critical point-particle and string quantum mechanics (1998)
It is observed that some structures recently uncovered in the study of Calogero-Sutherland models and anyons are close analogs of well-known structures of boundary conformal field theory. These...
An interferometric gravitational wave detector as a quantum-gravity apparatus (1998)
As a consequence of the extreme precision of the measurements it performs, an interferometric gravitational wave detector is a macroscopic apparatus for which quantum effects are not negligible. I...
On the area operators of the Husain-Kuchar-Rovelli model and Canonical/Loop Quantum Gravity (1998)
I investigate the relation between an operative definition of the area of a surface specified by matter fields and the area operators recently introduced in the canonical/loop approach to Quantum...
kappa-Deformed Covariant Phase Space and Quantum-Gravity Uncertainty Relations (1997)
Amelino-Camelia, Giovanni, Lukierski, Jerzy, Nowicki, Anatol
We describe the deformed covariant phase space corresponding to the so-called kappa-deformation of D=4 relativistic symmetries, with quantum ``time'' coordinate and Heisenberg algebra obtained...
On the Three-Anyon Harmonics (1996)
Amelino-Camelia, Giovanni, Rim, Chaiho
The 3-anyon problem is studied using a set of variables recently proposed in an anyon gauge analysis by Mashkevich, Myrheim, Olaussen, and Rietman (MMOR). Boundary conditions to be satisfied by the...