Cortes Cubero, Axel
Physics, CUNY Graduate Center
Abstract: Integrable Quantum Field Theory and Anisotropic Chromodynamics: The structure of the atomic nucleus and the dynamics of its component particles are dictated by the theory of quantum chromodynamics (QCD). Not much information about the nonperturbative regime of this theory can be obtained without the aid of computer simulations. The nonperturbative regime includes unexplained phenomena like the confinement of quarks and the formation of hadrons, like protons and neutrons. We consider an anisotropic version of QCD, where the dynamics are not equivalent in different space-time directions. This theory can be broken down into a set of 2-dimensional exactly solvable field theories. We show how we can obtain exact nonperturbative information about these theories and apply it to QCD. We address analytically the problem of quark confinement.
Mathematics, Graduate Center
Abstract: As scientists, we have committed ourselves to the ideals of reason, empiricism and antiauthoritarianism as the way to produce knowledge about the world. While the knowledge produced is often perceived as objective truth, the foundations of the discipline are rooted in inherently political beliefs. In fact, the systems and institutions that produce scientific knowledge in America are themselves, in one fashion or another, inherently political bodies. In this talk, I hope to explore some questions about the role of science—and scientists—in society that arise from taking this point of view.
Physics, Graduate Center CUNY
Abstract: Localized nuclear spin polarization can create effective Zeeman fields in electron-based devices, providing control of electron spins in architectures for quantum information processing. By exploiting two competing mechanisms for optical pumping in semi-insulating GaAs, we demonstrate a spatially-dependent patterning of nuclear magnetization at the micron and nanoscales.