Research Activities:

•Theoretical investigation of ultrafast processes in bulk and low-dimensional semiconductors.

•Analysis of quantum-transport phenomena in the high-field regime.

•Study of the linear and non-linear optical response of quantum-wires and dots in the presence of Coulomb-correlation effects.

•Analysis of few-electron phenomena in artificial macroatoms.

•Microscopic modeling of state-of-the-art optoelectronic quantum devices, like quantum-cascade lasers.

•Implementation of quantum information processing with semiconductor nanostructures.

•Broad experience in the formal theory of stochastic simulations.

More specifically, Fausto Rossi has extremely broad experience in the theoretical modeling of many-body processes in semiconductors as well as in the formal theory and mathematical foundation of quantum information/computation. Within semiconductor physics and technology, he has a long tradition in the theory and simulation of nonequilibrium phenomena both in bulk and in nanostructured materials/devices, e.g., semiconductor superlattices, quantum wells, wires and dots. In particular, he has wide-ranging experience in the theoretical modeling of ultrafast coherent quantum phenomena in semiconductors [F. Rossi and T. Kuhn, Rev. Mod. Phys. 74 (2002)].

Together with Tilmann Kuhn (Uni-Muenster) in 1992 he proposed the first Monte Carlo method for the microscopic simulation of ultrafast coherent phenomena in photoexcited semiconductors [T. Kuhn and F. Rossi, Phys. Rev. Lett. 69, 977 (1992)]. The method has proved to be quite successful in understanding the fundamental physical processes which govern the ultrafast optical response of semiconductor bulk and nanostructures; Indeed, together with Thomas Elsaesser and co-workers (TU-Berlin) he has been able to explain a number of state-of the-art coherent optical experiments [see, e.g., A. Leitenstorfer et al., Phys. Rev. Lett. 73, 1687 (1994)].

In collaboration with Roberto Cingolani (NNL, Lecce) and Guido Goldoni (Uni-Modena) he has extensively worked on the optical properties of low-dimensional structures (mainly quantum wires and dots), with particular attention to Coulomb-correlation effects [F. Rossi and E. Molinari, Phys. Rev. Lett. 76, 3642 (1996)]. In collaboration with Paolo Lugli and co-workers (Uni-Roma II) he has studied quantum-transport phenomena in mesoscopic systems, with particular attention to energy-relaxation and dephasing processes in quantum open systems [F. Rossi et al., Phys. Rev. Lett. 80, 3348 (1998)].

More recently, in collaboration with Fabio Beltram and co-workers (NEST, Pisa) he has been working on the design and simulation of semiconductor-based quantum-cascade lasers [R.C. Iotti and F. Rossi, Phys. Rev. Lett. 87, 146603 (2001)], both in the mid- and in the far infrared spectral region. This activity has led to the design and fabrication of the first Terahertz laser [R. Koehler et al., Nature 417, 156 (2002)]. Concerning quantum information processing, together with Paolo Zanardi and co-workers (ISI, Torino) Fausto Rossi has being working on potential solid-state implementation schemes. In particular, he has studied noiseless-encoding strategies in semiconductor quantum-dot arrays [P. Zanardi and F. Rossi, Phys. Rev. Lett. 81, 4752 (1998)] and, more recently, he has proposed the first all-optical quantum computer based on semiconductor macroatoms/molecules [E. Biolatti et al., Phys. Rev. Lett. 85, 5647 (2000)].