[Entries] 'Bose-Einstein statistics', 'Quantum statistics', 'Renormalization', 'Spin statistics theorem'

We define statistics of quantum mechanical particles, obtaining the Bose–Einstein and Fermi–Dirac varieties of indistinguishable particles. After finding the rotation and Lorentz matrices in different Lorentz representations, we describe the spin-statistics theorem, relating fermions with half-integer spin and bosons with integer spin. We explain two simple proofs and say some words on two others. We end by discussing symmetries in more generality, and we discuss the fact that internal symmetries must commute with spacetime ones, due to the Coleman–Mandula theorem.We define statistics of quantum mechanical particles, obtaining the Bose–Einstein and Fermi–Dirac varieties of indistinguishable particles. After finding the rotation and Lorentz matrices in different Lorentz representations, we describe the spin-statistics theorem, relating fermions with half-integer spin and bosons with integer spin. We explain two simple proofs and say some words on two others. We end by discussing symmetries in more generality, and we discuss the fact that internal symmetries must commute with spacetime ones, due to the Coleman–Mandula theorem.

Cambridge University Press eBooksMar 11, 20190 citations

Generalized Statistics in Quantum Field Theory.

Heinz Scharfstein

Jan 1, 19620 citations

Paper XXXVII: Topological Origin of Spin and the Spin-Statistics Connection

Alexander Novickis

Abstract We demonstrate that the spin-statistics connection -- fermions carry half-integer spin and obey Fermi-Dirac statistics, bosons carry integer spin and obey Bose-Einstein statistics -- emerges as a topological theorem within the Hopf soliton framework, requiring no independent axiom. The configuration space of a single Hopf soliton with charge $H \neq 0$ is the mapping space $\mathcal{Q} = \text{Maps}_H(S^3, S^2)$ , whose fundamental group $\pi_1(\mathcal{Q}) = \mathbb{Z}_2$ renders $2\pi$ rotation topologically non-trivial. The Finkelstein-Rubinstein construction then selects the double-valued (fermionic) quantization: wavefunctions on $\mathcal{Q}$ acquire a sign under $2\pi$ rotation, yielding spin-1/2. Exchange of two identical $H \neq 0$ solitons is topologically equivalent to $2\pi$ rotation of one, enforcing antisymmetric wavefunctions -- the Pauli exclusion principle derived from topology. The photon ( $H=0$ ) has simply connected configuration space ( $\pi_1 = 0$ ), automatically giving integer spin and Bose-Einstein statistics. In 2+1 dimensions, the fundamental group becomes $\mathbb{Z}$ (the braid group), producing anyonic statistics. The geometric (Berry) phase under adiabatic rotation reproduces the FR sign rule exactly. We compare this topological proof with the Streater-Wightman axiomatic proof and identify the structural reasons for their agreement. Keywords: spin-statistics theorem, Finkelstein-Rubinstein quantization, Hopf soliton, configuration space topology, fundamental group, Pauli exclusion principle, anyons, Berry phase, braid group, topological quantum field theory Keywords physics spin statistics fermion boson topology soliton hopf finkelstein rubinstein Type Preprint License CC BY 4.0 Date 2026-03-26 Subject Theoretical Physics DOI 10.5281/zenodo.19163319 © 2026 Alexander Novickis. Licensed under Creative Commons Attribution 4.0 International.Abstract We demonstrate that the spin-statistics connection -- fermions carry half-integer spin and obey Fermi-Dirac statistics, bosons carry integer spin and obey Bose-Einstein statistics -- emerges as a topological theorem within the Hopf soliton framework, requiring no independent axiom. The configuration space of a single Hopf soliton with charge $H \neq 0$ is the mapping space $\mathcal{Q} = \text{Maps}_H(S^3, S^2)$, whose fundamental group $\pi_1(\mathcal{Q}) = \mathbb{Z}_2$ renders $2\pi$ rotation topologically non-trivial. The Finkelstein-Rubinstein construction then selects the double-valued (fermionic) quantization: wavefunctions on $\mathcal{Q}$ acquire a sign under $2\pi$ rotation, yielding spin-1/2. Exchange of two identical $H \neq 0$ solitons is topologically equivalent to $2\pi$ rotation of one, enforcing antisymmetric wavefunctions -- the Pauli exclusion principle derived from topology. The photon ($H=0$) has simply connected configuration space ($\pi_1 = 0$), automatically giving integer spin and Bose-Einstein statistics. In 2+1 dimensions, the fundamental group becomes $\mathbb{Z}$ (the braid group), producing anyonic statistics. The geometric (Berry) phase under adiabatic rotation reproduces the FR sign rule exactly. We compare this topological proof with the Streater-Wightman axiomatic proof and identify the structural reasons for their agreement. Keywords: spin-statistics theorem, Finkelstein-Rubinstein quantization, Hopf soliton, configuration space topology, fundamental group, Pauli exclusion principle, anyons, Berry phase, braid group, topological quantum field theory Keywords physics spin statistics fermion boson topology soliton hopf finkelstein rubinstein Type Preprint License CC BY 4.0 Date 2026-03-26 Subject Theoretical Physics DOI 10.5281/zenodo.19163319 © 2026 Alexander Novickis. Licensed under Creative Commons Attribution 4.0 International.

Mar 19, 20260 citations

Fermi–Dirac and Bose–Einstein Statistics

IMPERIAL COLLEGE PRESS eBooksApr 10, 20130 citations

H \neq 0

is the mapping space

\mathcal{Q} = \text{Maps}_H(S^3, S^2)

, whose fundamental group

\pi_1(\mathcal{Q}) = \mathbb{Z}_2

renders

2\pi

rotation topologically non-trivial. The Finkelstein-Rubinstein construction then selects the double-valued (fermionic) quantization: wavefunctions on

\mathcal{Q}

acquire a sign under

2\pi

rotation, yielding spin-1/2. Exchange of two identical

H \neq 0

solitons is topologically equivalent to

2\pi

rotation of one, enforcing antisymmetric wavefunctions -- the Pauli exclusion principle derived from topology. The photon (

H=0

) has simply connected configuration space (

\pi_1 = 0

), automatically giving integer spin and Bose-Einstein statistics. In 2+1 dimensions, the fundamental group becomes

\mathbb{Z}

(the braid group), producing anyonic statistics. The geometric (Berry) phase under adiabatic rotation reproduces the FR sign rule exactly. We compare this topological proof with the Streater-Wightman axiomatic proof and identify the structural reasons for their agreement. Keywords: spin-statistics theorem, Finkelstein-Rubinstein quantization, Hopf soliton, configuration space topology, fundamental group, Pauli exclusion principle, anyons, Berry phase, braid group, topological quantum field theory Keywords physics spin statistics fermion boson topology soliton hopf finkelstein rubinstein Type Preprint License CC BY 4.0 Date 2026-03-26 Subject Theoretical Physics DOI 10.5281/zenodo.19163319 © 2026 Alexander Novickis. Licensed under Creative Commons Attribution 4.0 International.