U(1) $\times$ U(1) / Z$_2$ Kosterlitz-Thouless transition of the Larkin-Ovchinnikov phase in an anisotropic two-dimensional system

U(1) Gauge Theory as Quantum Hydrodynamics

U(1) Gauge Theory of the Hubbard Model : Spin Liquid States and Possible Application to k-(BEDT-TTF)_2 Cu_2 (CN)_3

U(1) slave-particle study of the finite-temperature doped Hubbard model in one and two dimensions

U(1) Slave-spin theory and its application to Mott transition in a multi-orbital model for iron pnictides

U(1) spin liquids and valence bond solids in a large-N three-dimensional Heisenberg model

U(1) symmetry breaking in one-dimensional Mott insulator studied by the Density Matrix Renormalization Group method

U(1)-Symmetry breaking and violation of axial symmetry in TlCuCl3 and other insulating spin systems

U(1)xSU(2) Chern--Simons gauge theory of underdoped cuprate superconductors

U(1)XSU(2) Gauge theory of underdoped high Tc cuprates via Chern-Simons bosonization

U(1)_V x U(1)_A symmetry breaking in superconductivity

U-J Synergy Effect for the High Tc Superconductors

Ubiquitous finite-size scaling features in IV characteristics of various dynamic XY models in two dimensions

Ubiquitous V-shape density of states in mixed state of clean limit type II superconductors; STM experiment and theory

Ubiquity of metastable-to-stable crossover in weakly chaotic dynamical systems

Uemura Plot as a Certificate of Two-dimensional Character of Superconducting Transition for Quasi-two-dimensional HTS

Ugo Fano and Shape Resonances

Ulta-slow relaxation in discontinuous-film based electron glasses

Ultimate Depth Resolution and Profile Reconstruction in Sputter Profiling with AES and SIMS

Ultimate Fate of Constrained Voters