Condensed Matter

NEMESYS is a multidisciplinary and convergence research proposal in statistical physics and many body Green´s function theory. Central to its overall theme is an investigation of the striking out-of-equilibrium properties and excited-state features of many fermions and bosons in low-dimensions. These include a wide variety of systems as diverse as: (i) mutually interacting electrons in a honeycomb lattice potential, (ii) ensembles of ultra-cold atomic gases, (iii) magnetic and spin systems, (iv) quantum wires and dots. The project aims at developing new methods and computational strategies to unravel the fundamental excitations and corresponding relaxation dynamics of novel low dimensional materials, which are also of strategic interest for nanoelectronics and quantum computing technologies. To this purpose, transport mechanisms and collective phenomena in condensed matter will be investigated by ab-initio and Montecarlo methods, as well as semicalssical multiscale approaches. Time-dependent density-functional and many-body perturbation theories will be further advanced and used as the most established ab-initio techniques to compute structural, electronic and optical properties of finite and extended systems. The NEMESYS program will involve running massive simulations of spectral features, dielectric screening, conductivity response and electro-mechanical properties of graphene-related and beyond-graphene materials, including their interfaces and contacts with supporting substrates. These simulations will be supported by a novel approach based on the concept of resonant continuum-discrete interaction developed by Fano. Verification and validation of the models will be sought by comparison of their predictions with measurements taken from well-consolidated surface-science spectroscopies and microscopies, which will hopefully lead to realization of simple devices. Finally, the irreversible properties of ultracold Fermi and Bose gases, following a change of their trapping potentials, will be addressed. The quantum thermodynamics of such interacting many-body systems will be also subject to scrutiny.