Electrostatic self-force in -dimensional cosmological gravity
نویسندگان
چکیده
منابع مشابه
Electrostatic self-force in (2+1)-dimensional cosmological gravity
Point sources in (2+1)-dimensional gravity are conical singularities that modify the global curvature of the space giving rise to selfinteraction effects on classical fields. In this work we study the electrostatic self-interaction of a point charge in the presence of point masses in (2+1)-dimensional gravity with a cosmological constant Λ. Exact expressions are obtained for the self-force on t...
متن کاملCosmological measurements, time and observables in (2+1)-dimensional gravity
We investigate the relation between measurements and the physical observables for vacuum spacetimes with compact spatial surfaces in (2+1)-gravity with vanishing cosmological constant. By considering an observer who emits lightrays that return to him at a later time, we obtain explicit expressions for several measurable quantities as functions on the physical phase space of the theory: the eige...
متن کاملUniversal approach to cosmological singularities in two-dimensional dilaton gravity.
We show that in a large class of two dimensional models with conformal matter fields, the semiclassical cosmological solutions have a weak coupling singularity if the classical matter content is below a certain threshold. This threshold and the approach to the singularity are model-independent. When the matter fields are not conformally invariant, the singularity persists if the quantum state i...
متن کاملSix Dimensional Topological Gravity and the Cosmological Constant Problem
We formulate a topological theory in six dimensions with gauge group SO(3, 3) which reduces to gravity on a four dimensional defect if suitable boundary conditions are chosen. In such a framework we implement the reflection automorphism of SO(3, 3) as a Z2 symmetry which forbids the appearance of a gravitational cosmological constant. Some temptative speculations are presented also for the poss...
متن کاملThree-Dimensional p-Adaptive Computation of Electrostatic Force and Energy
This paper discusses a -adaptive finite element method for electrostatic force and energy computation based on the constitutive error criterion, and the implementation on a three-dimensional mixed polyhedral grid. The method is applied to simple MEMS structures and the convergence characteristic is demonstrated.
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Classical and Quantum Gravity
سال: 1997
ISSN: 0264-9381,1361-6382
DOI: 10.1088/0264-9381/14/12/024