Balanced Tripartite Entanglement, the Alternating Group A4 and the Lie Algebra sl(3,C) ⊕ u(1) - Archive ouverte HAL Access content directly
Journal Articles Reports on Mathematical Physics Year : 2010

Balanced Tripartite Entanglement, the Alternating Group A4 and the Lie Algebra sl(3,C) ⊕ u(1)

Abstract

We discuss three important classes of three-qubit entangled states and their encoding into quantum gates, finite groups and Lie algebras. States of the GHZ and W-type correspond to pure tripartite and bipartite entanglement, respectively. We introduce another generic class B of three-qubit states, that have balanced entanglement over two and three parties. We show how to realize the largest cristallographic group $W(E_8)$ in terms of three-qubit gates (with real entries) encoding states of type GHZ or W [M. Planat, {\it Clifford group dipoles and the enactment of Weyl/Coxeter group $W(E_8)$ by entangling gates}, Preprint 0904.3691 (quant-ph)]. Then, we describe a peculiar ``condensation" of $W(E_8)$ into the four-letter alternating group $A_4$, obtained from a chain of maximal subgroups. Group $A_4$ is realized from two B-type generators and found to correspond to the Lie algebra $sl(3,\mathbb{C})\oplus u(1)$. Possible applications of our findings to particle physics and the structure of genetic code are also mentioned.
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Dates and versions

hal-00437860 , version 1 (01-12-2009)

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Michel Planat, Peter Levay, Metod Saniga. Balanced Tripartite Entanglement, the Alternating Group A4 and the Lie Algebra sl(3,C) ⊕ u(1). Reports on Mathematical Physics, 2010, 67 (1), pp.39-51. ⟨hal-00437860⟩
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