Quantum discord of electron spins of noninteracting electron gases

In this paper, we analyze the quantum discord of electron spins of noninteracting electron gases. Our results imply that the quantum discord depends on the relative distance between the two electrons and the temperature. By a comparison between the quantum discord and the entanglement of formation, we find that the quantum discord is more robust than the entanglement of formation in the sense that the quantum discord takes a zero value only at discrete points of the range of the relative distance whereas the entanglement of formation can disappear for a finite relative distance

Preparation of carbon nanoparticles with strong optical limiting properties by laser ablation in water

10.1063/1.1637933Journal of Applied Physics9531455-1459JAPI

Study of N∗(1440){N^*(1440)} from J/Ψ{J/\Psi} decays

For $J/\Psi\to\bar pp \pi^0$ and $\bar pp\pi^+\pi^-$, the $\pi^0p$ and $p\pi^+\pi^-$ systems are limited to be pure isospin-(1/2) due to isospin conservation. This is a big advantage in studying $N^*$ resonances from $J/\Psi$ decays, compared with $\pi N$ and $\gamma N$ experiments. The process $J/\Psi\to\bar pN^*$ or $p\bar N^*$ provides a new way to probe the internal structure of the $N^*$ resonances. Here we report a quark model calculation for $J/\Psi\to\bar pp$, $\bar pN^*(1440)$ and $\bar N^*N^*$. The implication for the internal structure of $N^*(1440)$ is discussed