Browsing by Author "Benjamin, David"
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Impurity Physics in Resonant X-Ray Scattering and Ultracold Atomic Gases
Benjamin, David Isaiah (2014-10-21)This thesis presents work on theoretical tools used to study transient and quantum-fluctuating impurity potentials that arise in resonant x-ray scattering and ultracold atomic gases. These tools fall under two main classes, ... -
Microscopic Theory of Resonant Soft-X-Ray Scattering in Materials with Charge Order: The Example of Charge Stripes in High-Temperature Cuprate Superconductors
Benjamin, David Isaiah; Abanin, Dmitry; Abbamonte, Peter; Demler, Eugene A. (American Physical Society (APS), 2013)We present a microscopic theory of resonant soft-x-ray scattering that accounts for the delocalized character of valence electrons. Unlike past approaches based on local form factors, our functional determinant method ... -
Single-Band Model of Resonant Inelastic X-Ray Scattering by Quasiparticles in High-Tc Cuprate Superconductors
Benjamin, David; Klich, Israel; Demler, Eugene A. (American Physical Society (APS), 2014)We show that a simple model of noninteracting quasiparticles accurately describes resonant inelastic x-ray scattering (RIXS) experiments in the hole-doped cuprate superconductors. Band structure alone yields signatures ... -
Variational polaron method for Bose-Bose mixtures
Benjamin, David; Demler, Eugene A. (American Physical Society (APS), 2014)We study degenerate mixtures of heavy bosons and light superfluid bosons using a variational polaron transformation. We consider the Mott-insulator–superfluid transition of the heavy species and find that at T=0 interaction ...