Browsing by Subject "Dynamic symmetry"

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    Entanglement, local measurements and symmetry
    (Institute of Physics Publishing, 2003) Klyachko, A. A.; Shumovsky, A. S.
    AbstractAdefinition of entanglement in terms of local measurements is discussed.Namely, the maximum entanglement corresponds to the states that cause thehighest level of quantum fluctuations in all local measurements determinedby the dynamic symmetry group of the system. A number of examplesillustrating this definition is considered
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    ItemOpen Access
    Maximum entanglement and its proper measure
    (Institute of Physics, 2004) Klyachko, A. A.; Shumovsky, A. S.
    We discuss a definition of maximally entangled states in terms of maximum uncertainty of corresponding measurements. We describe a method of construction of bases of maximally entangled states. The entangled states that can be obtained from the maximally entangled states by means of SLOCC (stochastic local operations assisted by classical communications) we consider as semistable vectors. We discuss a measure of entanglement expressed in terms of a geometric invariant.