Finite-size analysis of the Fermi liquid properties of the homogeneous electron gas

We analyze the extrapolation to the thermodynamic limit of Fermi liquid properties of the homogeneous electron gas in two and three dimensions. Using field theory, we explicitly calculate finite-size effects of the total energy, the renormalization factor, and the effective mass at the Fermi surface within the random phase approximation (RPA) and discuss the validity for general metallic systems.Comment: 6 page

Renormalization factor and effective mass of the two-dimensional electron gas

We calculate the momentum distribution of the Fermi liquid phase of the homogeneous, two-dimensional electron gas. We show that, close to the Fermi surface, the momentum distribution of a finite system with $N$ electrons approaches its thermodynamic limit slowly, with leading order corrections scaling as $N^{-1/4}$. These corrections dominate the extrapolation of the renormalization factor, $Z$, and the single particle effective mass, $m^*$, to the infinite system size. We show how convergence can be improved analytically. In the range $1 \le r_s \le 10$, we get a lower renormalization factor $Z$ and a higher effective mass, $m^*>m$, compared to the perturbative RPA values.Comment: 4 pages, 3 figure

Molecular-Atomic Transition in the Deuterium Hugoniot with Coupled Electron Ion Monte Carlo

We have performed accurate simulations of the Deuterium Hugoniot using Coupled Electron Ion Monte Carlo (CEIMC). Using highly accurate quantum Monte Carlo methods for the electrons, we study the region of maximum compression along the principal Hugoniot, where the system undergoes a continuous transition from a molecular fluid to a monatomic fluid. We include all relevant physical corrections so that a direct comparison to experiment can be made. Around 50 GPa we found a maximum compression of 4.85, roughly 10% larger than previous theoretical predictions and experimental data but still compatible with the latter because of their large uncertainty.Comment: 7 pages, 3 figure

Blood markers of alcohol use in epistaxis patients

Epistaxis and alcohol overconsumption are frequently encountered in patients admitted to emergency wards. The aim of the study was to analyze indirect markers of alcohol overconsumption in epistaxis patients and evaluate its role as a risk factor. In a cohort of 510 epistaxis patients indirect markers of alcohol overuse were measured including the mean corpuscular volume (MCV), gamma glutamyltransferase (GGT), aspartate aminotransferase and alanine aminotransferase. The results were compared to the normal findings in literature. Pathologic mean levels of GGT were found in epistaxis patients. Almost 5% had macrocytosis and MCV correlated positively with liver enzyme levels. Platelet counts were negatively correlated with both corpuscular volumes and liver enzymes. Indirect markers of alcohol overconsumption were found to be elevated in epistaxis patients. These results suggest that a subgroup of epistaxis patients overconsumes alcoholic beverages supporting the idea of alcohol abuse being a risk factor in epistaxis. Questioning about drinking habits should be employed and help offered to affected patient

PHENIX and the Reaction Plane: Recent Results

During the past several years, experiments at RHIC have established that a dense partonic medium is produced in Au+Au collisions at sqrt(s)=200 GeV. Subsequently, a primary goal of analysis has been to understand and characterize the dynamics underlying this new form of matter. Among the many probes available, the measurements with respect to the reaction plane has proven to be crucial to our understanding of a wide range of topics, from the hydrodynamics of the initial expansion of the collision region to high-pt jet quenching phenomena. Few tools have the ability to shed light on such a wide variety of observables as the reacion plane. In this article, we discuss recent PHENIX measurements with respect to the reaction plane, and the implications for understanding the underlying physics of RHIC collisions.Comment: 9 pages, 13 figures, Submitted for proceedings to the Winter Workshop on Nuclear Dynamics 2010, Ocho Rios, Jamaic