Quantum operations on conformal nets

M Bischoff, S Del Vecchio, L Giorgetti - Reviews in Mathematical …, 2023 - World Scientific
On a conformal net 𝒜, one can consider collections of unital completely positive maps on
each local algebra 𝒜 (I), subject to natural compatibility, vacuum preserving and conformal …

Haploid Algebras in -Tensor Categories and the Schellekens List

S Carpi, T Gaudio, L Giorgetti, R Hillier - Communications in Mathematical …, 2023 - Springer
We prove that a haploid associative algebra in a C∗-tensor category C is equivalent to a Q-
system (a special C∗-Frobenius algebra) in C if and only if it is rigid. This allows us to prove …

Remarks on anomalous symmetries of C*-algebras

C Jones - Communications in Mathematical Physics, 2021 - Springer
For a group G and ω ∈ Z^ 3 (G, U (1)) ω∈ Z 3 (G, U (1)), an ω ω-anomalous action on a C*-
algebra B is a U (1) U (1)-linear monoidal functor between 2-groups, where the latter …

Minimal index and dimension for 2-C*-categories with finite-dimensional centers

L Giorgetti, R Longo - Communications in Mathematical Physics, 2019 - Springer
In the first part of this paper, we give a newlook at inclusions of von Neumann algebras with
finite-dimensional centers and finite Jones' index. The minimal conditional expectation is …

The differential structure of generators of GNS-symmetric quantum Markov semigroups

M Wirth - arXiv preprint arXiv:2207.09247, 2022 - arxiv.org
We show that the generator of a GNS-symmetric quantum Markov semigroup can be written
as the square of a derivation. This generalizes a result of Cipriani and Sauvageot for tracially …

Galois correspondence and Fourier analysis on local discrete subfactors

M Bischoff, S Del Vecchio, L Giorgetti - Annales Henri Poincaré, 2022 - Springer
Discrete subfactors include a particular class of infinite index subfactors and all finite index
ones. A discrete subfactor is called local when it is braided and it fulfills a commutativity …

[HTML][HTML] Realization of rigid C⁎-bicategories as bimodules over type II1 von Neumann algebras

L Giorgetti, W Yuan - Advances in Mathematics, 2023 - Elsevier
We prove that every rigid C⁎-bicategory with finite-dimensional centers (finitely
decomposable horizontal units) can be realized as Connes' bimodules over finite direct …

A planar algebraic description of conditional expectations

L Giorgetti - International Journal of Mathematics, 2022 - World Scientific
Let 𝒩⊂ ℳ be a unital inclusion of arbitrary von Neumann algebras. We give a 2-C∗-
categorical/planar algebraic description of normal faithful conditional expectations E: ℳ→ …

Minimal index and dimension for inclusions of von Neumann algebras with finite-dimensional centers

L Giorgetti - arXiv preprint arXiv:1908.09121, 2019 - arxiv.org
The notion of index for inclusions of von Neumann algebras goes back to a seminal work of
Jones on subfactors of type ${I\! I} _1 $. In the absence of a trace, one can still define the …