We review the mechanism of gaugino condensation in the framework of the d = 10 heterotic string and its d = 11 extension of Horava and Witten. In particular we emphasize the relation between the gaugino condensate and the flux of the antisymmetric tensor fields of higher dimensional supergravity. Its potential role for supersymmetry breakdown and moduli stabilization is investigated.

Let G be the group of projectivities stabilizing a unital U in PG(2, q2) and let A,B be two distinct points of U . In this paper we prove that, if G has an elation group of order q with center A and a group of projectivities stabilizing both A and B of order a divisor of q − 1 greater than 2(√q − 1), then U is an ovoidal Buekenhout–Metz unital. From this result two group theoretic characterizat...

The discovery of fascinating ways to control and manipulate antiferromagnetic materials have garnered considerable attention as an attractive platform explore novel spintronic phenomena functionalities. Layered antiferromagnets (AFMs) exhibiting interesting magnetic structures can serve starting point establish functionalities down the two-dimensional limit. In this work, we magnetoresistive pr...

The charge-stabilization method is applied to double ionization potential equation-of-motion (EOM-DIP) calculations to stabilize unstable dianion reference functions. The auto-ionizing character of the dianionic reference states spoils the numeric performance of EOM-DIP limiting applications of this method. We demonstrate that reliable excitation energies can be computed by EOM-DIP using a stab...

background: an effective polymer gel dosimeter can be fabricated by varying the composition of its chemical components. materials and methods: the magat gel dosimeter formulations that used different compositions of methacrylic acid (maa) and gelatin were extensively investigated in the present study according to the r2–dose response and r2–dose sensitivity. the irradiation of magat gel was per...

By considering two ab initio-based complementary approaches, we analyze the electronic structure and extract effective spin models of ${\mathrm{BaCo}}_{2}{({\mathrm{AsO}}_{4})}_{2}$, a honeycomb material which has been proposed as candidate for Kitaev physics. Both methods show that dominant direct hopping makes bond-dependent term negligible, diverting away from sought-after spin-liquid regime...

We investigate the spin excitation spectra in chiral and polar magnets by linear spin-wave theory for an effective model with symmetric antisymmetric long-range interactions. In one dimension, we obtain analytic form of dynamical structure factor proper-screw cycloidal helical states uniform twists, which shows a gapless mode strong intensity at wave number. When introducing anisotropy interact...

The phase synchronization problem requires each node to infinitely transfer from one phase to the next one under the restriction that at most two consecutive phases can appear among all nodes. In this paper, we propose a self-stabilizing algorithm under the parallel execution model to solve this problem for semi-uniform systems of general graph topologies. The proposed algorithm is memory-effic...

This paper describes a self-stabilizing version of an algorithm presented by A. Mazurkiewicz [Inform. Process. Lett. 61 (1997) 233–239] for enumerating nodes by local rules on an anonymous network. The result improves the reliability aspects of the original algorithm and underlines the importance of a non-ambiguous topology for a network.  2001 Elsevier Science B.V. All rights reserved.