R. Casalbuoni

Massive and massless particles in Mielke--Baekler geometries

Carles Batlle, R. Casalbuoni, Daniele Dominici, José Figueroa-O'Farrill et autres

The Mielke--Baekler geometries are three-dimensional reductive homogeneous spacetimes together with a choice of invariant connection which is compatible with a lorentzian metric. The spacetimes generalise Minkowski and (anti)de~Sitter spacetimes in that the invariant metric connection can have torsion, a peculiarity of three …

Massive and massless particles in Mielke--Baekler geometries

Carles Batlle, R. Casalbuoni, Daniele Dominici, José Figueroa-O'Farrill et autres

The Mielke--Baekler geometries are three-dimensional reductive homogeneous spacetimes together with a choice of invariant connection which is compatible with a lorentzian metric. The spacetimes generalise Minkowski and (anti)de~Sitter spacetimes in that the invariant metric connection can have torsion, a peculiarity of three …

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From Florence to Fermions: a historical reconstruction of the origins of Fermi’s statistics one hundred years later

R. Casalbuoni, D. Dominici

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From Florence to Fermions: a historical reconstruction of the origins of Fermi's statistics one hundred years later

R. Casalbuoni, Daniele Dominici

Aim of this paper is to retrace the path that led the young Enrico Fermi to write his paper on the statistics of an ideal monatomic gas. This discovery originated in his interest, which he had shown since his formative years, in …

From Florence to Fermions: a historical reconstruction of the origins of Fermi's statistics one hundred years later

R. Casalbuoni, Daniele Dominici

Aim of this paper is to retrace the path that led the young Enrico Fermi to write his paper on the statistics of an ideal monatomic gas. This discovery originated in his interest, which he had shown since his formative years, in …

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Celestial kinematical interpretation for an extended BMS 4 algebra

Carles Batlle, R. Casalbuoni, D. Dominici, José Miguel Figueroa-O'Farrill et autres

Motivated by the work of Longhi and Materassi, who constructed a realization of the (centerless) BMS 4 algebra for the massive Klein-Gordon field in 3 + 1 dimensions, we build a realization of the (centerless) massless BMS 4 algebra including superrotations. This …

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A Celestial Kinematical Interpretation for an Extended BMS$_4$

Carles Batlle, R. Casalbuoni, D. Dominici, José Miguel Figueroa-O'Farrill et autres

Motivated by the work of Longhi and Materassi, who constructed a realisation of the (centreless) BMS$_4$ algebra for the massive Klein-Gordon field in $3+1$, we build a realisation of the (centreless) massless BMS$_4$ algebra including super-rotations. This realisation depends only on the …

Nonequivalence of Carroll limits in relativistic string theory

R. Casalbuoni, D. Dominici, Joaquim Gomis

We construct new Carroll strings in flat space by considering the Carroll limit of equivalent relativistic string theories at the classical level. In the limit these Carroll strings are no longer equivalent and have different degrees of freedom. This fact is due …

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Non equivalence of Carroll limits in relativistic string theory

R. Casalbuoni, Daniele Dominici, Joaquim Gomis

We construct new Carroll strings in flat space by considering the Carroll limit of equivalent relativistic string theories at classical level. In the limit these Carroll strings are no longer equivalent and have different degrees of freedom. This fact is due to …

Superconformal interacting particles

R. Casalbuoni, D. Dominici, Joaquim Gomis

The free massless superparticle is reanalyzed, in particular by performing the Gupta-Bleuler quantization, using the first- and second-class constraints of the model, and obtaining as a result, the Weyl equation for the spinorial component of the chiral superfield. Then we construct a …

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Superconformal interacting particles

R. Casalbuoni, Daniele Dominici, Joaquim Gomis

The free massless superparticle is reanalysed, in particular by performing the Gupta-Bleuler quantization, using the first and second class constraints of the model, and obtaining, as a result, the Weyl equation for the spinorial component of the chiral superfield. Then we construct …

Two interacting conformal Carroll particles

R. Casalbuoni, D. Dominici, Joaquim Gomis

In this paper we analyze two different models of two interacting conformal Carroll particles that can be obtained as the Carrollian limit of two relativistic conformal particles. The first model describes particles with zero velocity and exhibits infinite dimensional symmetries which are …

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