Comptes Rendus
Article de recherche - Analyse fonctionnelle, Géométrie et Topologie
Maximal exponent of the Lorentz cones
[Exposant maximal des cônes de Lorentz]
Comptes Rendus. Mathématique, Volume 362 (2024), pp. 1379-1388.

Nous démontrons que l’exposant maximal (c’est-à-dire le nombre minimal d’itérations requises pour qu’une application primitive devienne strictement positive) du cône de Lorentz de dimension n est égal à n. Nous montrons également que l’exposant optimal dans l’inégalité de Wielandt quantique pour des canaux agissant sur un qubit est égal à 3.

We show that the maximal exponent (i.e., the minimum number of iterations required for a primitive map to become strictly positive) of the n-dimensional Lorentz cone is equal to n. As a byproduct, we show that the optimal exponent in the quantum Wielandt inequality for qubit channels is equal to 3.

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DOI : 10.5802/crmath.649
Classification : 52A20, 51M04
Keywords: Lorentz cone, Maximal exponent, Quantum Wielandt inequality
Mot clés : Cône de Lorentz, exposant maximal, inégalité de Wielandt quantique

Guillaume Aubrun 1 ; Jing Bai 2, 1

1 Institut Camille Jordan, Université Claude Bernard Lyon 1, CNRS, INRIA, 43 boulevard du 11 novembre 1918, 69622 Villeurbanne cedex, France
2 School of Mathematics, Harbin Institute of Technology, 92 West Dazhi Street, Nangang District, 150001 Harbin, China
Licence : CC-BY 4.0
Droits d'auteur : Les auteurs conservent leurs droits
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     title = {Maximal exponent of the {Lorentz} cones},
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Guillaume Aubrun; Jing Bai. Maximal exponent of the Lorentz cones. Comptes Rendus. Mathématique, Volume 362 (2024), pp. 1379-1388. doi : 10.5802/crmath.649. https://comptes-rendus.academie-sciences.fr/mathematique/articles/10.5802/crmath.649/

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