Poster (Scientific congresses and symposiums)
Anticoherence of spin states with point-group symmetries
Baguette, Dorian; Damanet, François; Giraud, Olivier et al.
2016Annual meeting of the German Physical Society
 

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Abstract :
[en] We investigate multiqubit permutation-symmetric states with maximal entropy of entanglement. Such states can be viewed as particular spin states, namely anticoherent spin states. Using the Majorana represen- tation of spin states in terms of points on the unit sphere, we analyze the consequences of a point-group symmetry in their arrangement on the quantum properties of the corresponding state [1]. We focus on the identi cation of anticoherent states (for which all reduced density matrices in the symmetric subspace are maximally mixed) associated with point-group-symmetric sets of points. We provide three di erent characterizations of anticoherence and establish a link between point symmetries, anticoherence, and classes of states equivalent through stochastic local operations with classical communication. We then in- vestigate in detail the case of small numbers of qubits and construct in nite families of anticoherent states with point-group symmetry of their Majorana points, showing that anticoherent states do exist to arbitrary order. [1] D. Baguette et al., Phys. Rev. A 92, 052333 (2015).
Disciplines :
Physics
Author, co-author :
Baguette, Dorian ;  Université de Liège > Département de physique > Optique quantique
Damanet, François  ;  Université de Liège > Département de physique > Optique quantique
Giraud, Olivier;  LPTMS, CNRS, Univ. Paris-Sud, Université Paris-Saclay, 91405 Orsay, France
Martin, John  ;  Université de Liège > Département de physique > Optique quantique
Language :
English
Title :
Anticoherence of spin states with point-group symmetries
Publication date :
02 March 2016
Event name :
Annual meeting of the German Physical Society
Event date :
from 29-02-2016 to 04-03-2016
Audience :
International
Available on ORBi :
since 04 March 2016

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