Polynomial invariants and Bell inequalities as entanglement measure of 4-qubit states

Details Polynomial invariants and Bell inequalities as entanglement measure of 4-qubit states Polynomial invariants and Bell inequalities as entanglement measure of 4-qubit states

2006-06-26

arxiv.org/abs/quant-ph/0606215v1

Physics

Quantum Physics

4 pages, 4 figures

Scientific paper

We compare the polynomial invariants for four qubits introduced by Luque and
Thibon, PRA {\bf 67}, 042303 (2003), with optimized Bell inequalities and a
combination of two qubit concurrences. It is shown for various parameter
dependent states from different SLOCC classes that it is possible to measure a
genuine 4-qubit entanglement with these polynomials.

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