Article (Scientific journals)
Anticoherence measures for pure spin states
Baguette, Dorian; Martin, John
2017In Physical Review. A, Atomic, molecular, and optical physics, 96, p. 032304
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Abstract :
[en] The set of pure spin states with vanishing spin expectation value can be regarded as the set of the less coherent pure spin states. This set can be divided into a finite number of nested subsets on the basis of higher order moments of the spin operators. This subdivision relies on the notion of anticoherent spin state to order t : A spin state is said to be anticoherent to order t if the moment of order k of the spin components along any directions are equal for k = 1,2, . . . ,t . Most spin states are neither coherent nor anticoherent, but can be arbitrary close to one or the other. In or- der to quantify the degree of anticoherence of pure spin states, we introduce the notion of anticoherence measures. By relying on the mapping between spin-j states and symmetric states of 2j spin 1/2 (Majorana representation), we present a systematic way of constructing anticoherence measures to any order. We briefly discuss their connection with measures of quantum coherence. Finally, we illustrate our measures on various spin states and use them to investigate the problem of the existence of anticoherent spin states with degenerated Majorana points.
Disciplines :
Physics
Author, co-author :
Baguette, Dorian ;  Université de Liège > Département de physique > Optique quantique
Martin, John  ;  Université de Liège > Département de physique > Optique quantique
Language :
English
Title :
Anticoherence measures for pure spin states
Publication date :
September 2017
Journal title :
Physical Review. A, Atomic, molecular, and optical physics
ISSN :
1050-2947
eISSN :
1094-1622
Publisher :
American Physical Society
Volume :
96
Pages :
032304
Peer reviewed :
Peer Reviewed verified by ORBi
Tags :
CÉCI : Consortium des Équipements de Calcul Intensif
Funders :
CÉCI - Consortium des Équipements de Calcul Intensif [BE]
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