Communications in Mathematical Physics

, Volume 357, Issue 1, pp 159–202 | Cite as

\({{SO(d,1)}}\)-Invariant Yang–Baxter Operators and the dS/CFT Correspondence

  • Stefan Hollands
  • Gandalf LechnerEmail author
Open Access


We propose a model for the dS/CFT correspondence. The model is constructed in terms of a “Yang–Baxter operator” R for unitary representations of the de Sitter group \({SO(d,1)}\). This R-operator is shown to satisfy the Yang–Baxter equation, unitarity, as well as certain analyticity relations, including in particular a crossing symmetry. With the aid of this operator we construct: (a) a chiral (light-ray) conformal quantum field theory whose internal degrees of freedom transform under the given unitary representation of \({SO(d,1)}\). By analogy with the O(N) non-linear sigma model, this chiral CFT can be viewed as propagating in a de Sitter spacetime. (b) A (non-unitary) Euclidean conformal quantum field theory on \({\mathbb{R}^{d-1}}\), where SO(d, 1) now acts by conformal transformations in (Euclidean) spacetime. These two theories can be viewed as dual to each other if we interpret \({\mathbb{R}^{d-1}}\) as conformal infinity of de Sitter spacetime. Our constructions use semi-local generator fields defined in terms of R and abstract methods from operator algebras.


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Authors and Affiliations

  1. 1.Institut für Theoretische PhysikUniversität LeipzigLeipzigGermany
  2. 2.School of MathematicsCardiff UniversityCardiffUK

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