Did you ever start learning Spanish full of enthusiasm and energy, just to quit a few hours or classes later?Did you ever want to improve your Spanish but nobody was there to encourage you when your motivation waivered?Well, there is a simple solution for this: "Speak in Spanish- Fun and motivation on your learning journey" is a unique learning companion book whose sole purpose is to give you plenty of inspiration, encouragement, as well as happy and informative moments whil...

This thesis presents an exact theoretical study of dynamical correlation functions in different phases of a two-dimensional quantum spin liquid. By calculating the dynamical spin structure factor and the Raman scattering cross section, this thesis shows that there are salient signatures—qualitative and quantitative—of the Majorana fermions and the gauge fluxes emerging as effective degrees of freedom in the exactly solvable Kitaev honeycomb lattice model. The model is a representative of a...

Migration is in the news every day. Whether it be the plight of refugees fleeing Syria, or the outbreak of the Zika virus across Latin America, the modern world is fundamentally shaped by movement across borders. Migration, arising from the 2018 Darwin College Lectures, brings together eight leading scholars across the arts, humanities, and sciences to help tackle one of the most important topics of our time. What is migration? How has it changed the world? And how will it shape the future...