Bell State for 2-Qubit

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Quantum Entangled Images

In this photo montage of actual quantum images, two laser beams coming from the bright glare in the distance transmit images of a cat-like face at two slightly different frequencies (represented by the orange and the purple colors). The twisted lines indicate that the seemingly random changes or fluctuations that occur over time in any part of the orange image are strongly interconnected or “entangled” with the fluctuations of the corresponding part in the purple image. Though false color has been added to the cats’ faces, they are otherwise actual images obtained in the experiment.

Credit: NIST
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Source : I got email (25 June 2008) from my supervisor about this, tq dr hz....here the link.

Entanglement in Spin One Spin Chain

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Relations between Entanglement Witnesses and Bell Inequalities

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Two Qutrits Entanglement Witnesses and Gell Mann Matrices

The Gell-Mann $\lambda$ matrices for Lie algebra su(3) are the natural basis for the Hilbert space of Hermitian operators acting on the states of a three-level system(qutrit). So the construction of EWs for two-qutrit states by using these matrices may be an interesting problem. In this paper, several two-qutrit EWs are constructed based on the Gell-Mann matrices by using the linear programming (LP) method exactly or approximately. The decomposability and non-decomposability of constructed EWs are also discussed and it is shown that the $\lambda$-diagonal EWs presented in this paper are all decomposable but there exist non-decomposable ones among $\lambda$-non-diagonal EWs.
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Entanglement Witness For Qubits and Qutrits

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SlideShow : Quantum Entanglement and Bell Inequalities

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