Article (Scientific journals)
Anticoherence of spin states with point-group symmetries
Baguette, Dorian; Damanet, François; Giraud, Olivier et al.
2015In Physical Review. A, Atomic, molecular, and optical physics, 92, p. 052333
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Keywords :
Anticoherence; spin states; point-group symmetries
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 representation 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. We focus on the identification 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 different 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 investigate in detail the case of small numbers of qubits and construct infinite families of anticoherent states with point-group symmetry of their Majorana points, showing that anticoherent states do exist to arbitrary order.
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, Universit ́e 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 :
24 December 2015
Journal title :
Physical Review. A, Atomic, molecular, and optical physics
ISSN :
1050-2947
eISSN :
1094-1622
Publisher :
American Physical Society
Volume :
92
Pages :
052333
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 27 November 2015

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