“A splendid, edifying report from the front lines of theorectical physics”(San Francisco
Chronicle). In this illuminating book, renowned physicist Lee Smolin argues that …

We propose a deepening of the relativity principle according to which the invariant arena for
nonquantum physics is a phase space rather than spacetime. Descriptions of particles …

The motion of a composite system made of N particles is examined in a space with a
canonical noncommutative algebra of coordinates. It is found that the coordinates of the …

Quantum gravity is studied in a semiclassical approximation and it is found that to first order
in ℏG= lPl the effect of quantum gravity is to make the low energy effective spacetime metric …

Several issues concerning the quantum κ-Poincaré algebra are discussed and reconsidered
here. We propose two different formulations of the κ-Poincaré quantum algebra. Firstly we …

We consider the behavior of macroscopic bodies within the framework of relative locality [G.
Amelino-Camelia, L. Freidel, J. Kowalski-Glikman, and L. Smolin, arXiv: 1101.0931]. This is …

Abstract Some classes of Deformed Special Relativity (DSR) theories are reconsidered
within the Hopf algebraic formulation. For this purpose we shall explore a minimal …

The most studied doubly special-relativity scenarios, theories with both the speed-of-light
scale and a length/inverse-momentum scale as nontrivial relativistic invariants, have …

The phase space of a classical particle in deformed special relativity (DSR) contains de
Sitter space as the space of momenta. We start from the standard relativistic particle in five …

Several arguments suggest that the Planck scale could be the characteristic scale of
curvature of momentum space. As other recent studies, we assume that the metric of …