In this thesis we have studied the e®ects on ground-state entanglement and quantum-state transfer caused by the presence of one and two diagonal impu- rities in a 1D ring-shaped spin-1 2 hamiltonian with XX ferromagnetic ...

Raman measurements, performed on MWCNTs grown by arc discharge method in He atmosphere, have pointed out the occurrence of a band at 1780- 1860 cm–1, regardless of the use of a catalytic Ni-Cr alloy in the synthesis ...

Understanding the adsorption, catalytic, and electronic properties of metal/metal interfaces is one of the foremost aims of surface science. In fact, through the tailoring of the characteristics of the substrate it should ...

Energy harvesting represent one of the most important problem in today's society: climate changes and geopolitical instabilities remember ourself everyday the needs to nd alternatives to hydrocarbon exploiting. During ...

The even growing energy demand due to the demographic growth and the consequent economic expansion has led to the search for innovative technologies available for energy production and conversion from green and renewable ...