Enhanced Ps-Ps Interactions due to Quantum Confinement

Enhanced Ps-Ps interactions due to quantum confinement.

Slow positrons implanted into a porous silica film may efficiently form positronium (Ps) atoms that diffuse through a network of interconnected pores. At high Ps densities, the long lifetime of ortho-positronium atoms is reduced due to Ps-Ps spin dependent interactions at a rate that implies an effective free-space scattering cross section, σ(e) = (3.4 ± 0.5) × 10(-14) cm(-2), at least 25 times...

Min_Time3.ps

We investigate in this paper the performance of a simple file sharing principle. For this purpose, we consider a system composed of N peers becoming active at exponential random times; the system is initiated with only one server offering the desired file and the other peers after becoming active try to download it. Once the file has been downloaded by a peer, this one immediately becomes a ser...

From PS{splines to NURPS

Some Properties of Fuzzy Dot PS-Subalgebras of PS- Algebra

In this paper, we introduce the notion of fuzzy dot PS-subalgebras in PSalgebras and establish its various properties.

Quark Confinement due to Random Interactions

On the level of an effective quark theory, we define confinement by the absence of quark anti-quark thresholds in correlation functions. We then propose a confining Nambu-Jona-Lasinio-type model. Its four fermion interaction in the color channel is mediated by a random color matrix. We study the model's phase structure as well as its behavior under extreme conditions, i.e. high temperature and/...