BMS particles

2024/12/08 by Bekaert, Xavier, Donnay, Laura, Herfray, Yannick · 4 citations
#FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc) #High Energy Physics - Theory (hep-th)

paper · doi:10.48550/arxiv.2412.06002

Abstract

We construct wavefunctions for unitary irreducible representations (UIRs) of the Bondi-Metzner-Sachs (BMS) group, i.e. BMS particles, and show that they describe quantum superpositions of (Poincaré) particles propagating on inequivalent gravity vacua. This follows from reconsidering McCarthy's classification of BMS group UIRs through a unique, Lorentz-invariant but non-linear, decomposition of supermomenta into hard and soft pieces.

Cited by

• Lectures on Carrollian Holography
• Modular Hamiltonian and entanglement entropy in the BMS free fermion theory
• Character of the highest weight module of BMS algebra realized on codimensional-two boundary
• Null infinity as an inverted extremal horizon: Matching an infinite set of conserved quantities for gravitational perturbations

Related

• BMS representations for generic supermomentum
• Representations of the ultrahyperbolic BMS group HB. III. Determination of the representations induced from finite little groups
• Representations of the ultrahyperbolic BMS group HB.II. Determination of the representations induced from infinite little groups
• Particle realization of Bondi-Metzner-Sachs symmetry in 2+1 space-time
• Lectures on the Bondi--Metzner--Sachs group and related topics in infrared physics