p hy si cs / 9 70 70 07 v 1 [ m at h - ph ] 9 J ul 1 99 7 Semiconductor Lasers and Kolmogorov Spectra

ar X iv : a lg - g eo m / 9 70 70 07 v 1 9 J ul 1 99 7 SYMPLECTIC DEFORMATIONS OF CALABI – YAU THREEFOLDS

ar X iv : a lg - g eo m / 9 70 70 04 v 1 7 J ul 1 99 7 PRINCIPAL G - BUNDLES OVER ELLIPTIC CURVES

ar X iv : p hy si cs / 9 71 20 19 v 1 [ m at h - ph ] 1 1 D ec 1 99 7 Symmetries of particle motion

We define affine transport lifts on the tangent bundle by associating a transport rule for tangent vectors with a vector field on the base manifold. The aim is to develop tools for the study of kinetic/ dynamical symmetries in relativistic particle motion. The transport lift unifies and generalises the various existing lifted vector fields, with clear geometric interpretations. We find the affi...

ar X iv : c on d - m at / 9 40 70 04 v 1 1 J ul 1 99 4 Charge Transfer Excitons and the Metal - Insulator Transition in the High Temperature

The effects of the nearest neighbour Coulomb repulsion, V , are considered in the one dimensional copper-oxide chain using the modified Lanczos method. Above a critical value of V we find that charge transfer excitons are the lowest lying energy exitations in the insulating phase. Close to the metal-insulator transition and V = 0 there is good 'particle-hole' symmetry, showing that the mapping ...

s . cl as s - ph ] 2 4 A ug 1 99 9 Unified Expressions Of All Integral Variational Principles Based On The Quantitative Causal Principle

X iv :p hy si cs /9 90 30 15 v2 [ ph ys ic s. cl as sph ] 2 4 A ug 1 99 9 Unified Expressions Of All Integral Variational Principles Based On The Quantitative Causal Principle Y. C. Huang 1,2 A. M. Li M. X. Shao X. G. Li Department of Applied Physics, Beijing Polytechnic University, Beijing 100022, P. R. China ( Email address: [email protected] ) Institute of Theoretical Physics, Chinese Acad...