Classification of Multipartite Entanglement of All Finite Dimensionality

Gilad Gour and Nolan R. Wallach

Phys. Rev. Lett. 111, 060502 – Published 8 August 2013

Abstract

We provide a systematic classification of multiparticle entanglement in terms of equivalence classes of states under stochastic local operations and classical communication (SLOCC). We show that such a SLOCC equivalency class of states is characterized by ratios of homogenous polynomials that are invariant under local action of the special linear group. We then construct the complete set of all such SL-invariant polynomials (SLIPs). Our construction is based on Schur-Weyl duality and applies to any number of qudits in all (finite) dimensions. In addition, we provide an elegant formula for the dimension of the homogenous SLIPs space of a fixed degree as a function of the number of qudits. The expressions for the SLIPs involve in general many terms, but for the case of qubits we also provide much simpler expressions.

Received 10 May 2013

DOI:https://doi.org/10.1103/PhysRevLett.111.060502

Authors & Affiliations

Gilad Gour^1,2,* and Nolan R. Wallach^2,†

¹Institute for Quantum Information Science and Department of Mathematics and Statistics, University of Calgary, 2500 University Drive NW, Calgary, Alberta, Canada T2N 1N4
²Department of Mathematics, University of California–San Diego, La Jolla, California 92093-0112, USA

^*gour@ucalgary.ca
^†nwallach@ucsd.edu

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Vol. 111, Iss. 6 — 9 August 2013

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