Anderson Localization and Mobility Edge in Curved Spacetime

We construct a quasiperiodic lattice model in a curved spacetime to explore the crossover concerning both condensed matter and curved spacetime physics. We study the related Anderson localization and find that the model has a clear boundary of localized-extended phase separation, which leads to the mobility edge, i.e., the coexistence of nonergodic localized, critical and extended phases. A novel self-consistent segmentation method is developed to calculate the analytical expression of the critical position of phase separation, and the rich phase diagram is determined by calculating the fractal dimension and scaling index in multifractal analysis.Comment: 17 pages, 4+12 figure

4,6-Dichloro-5-(2-meth­oxy­phen­oxy)-2,2′-bipyrimidine

In the title compound, C15H10Cl2N4O2, the dichloro­pyrimidine and meth­oxy­phen­oxy parts are approximately perpendicular [dihedral angle = 89.9 (9)°]. The dihedral angle between the two pyrimidine rings is 36.3 (4)° In the crystal, there are no hydrogen bonds but the mol­ecules are held together by short inter­molecular C⋯N [3.206 (3) Å] contacts and C—H⋯π inter­actions

An Improved Method to Knock Out the asd Gene of Salmonella enterica Serovar Pullorum

An asd-deleted (Δasd) mutant of Salmonella enterica serovar Pullorum (SP) was constructed using an improved method of gene knockout by combining the π-suicide plasmid system with the Red Disruption system. The asd gene was efficiently knocked out by the recombinant suicide vector, which replaced the asd gene with the CmR gene. Based on the balanced lethal host-vector system, the phenotype of the Δasd mutant was further defined. The improved method was simpler and more effective than previously reported conventional methods