Dirac’s Æther in Curved Spacetime-II: The Geometric Amplification of the Cosmic Magnetic Induction

نویسنده

  • Marcelo Carvalho
چکیده

We search for an amplification mechanism of the seed cosmic magnetic induction by studying a new version of the Dirac’s æther in a curved cosmological background. We find that an amplification takes place if the scale factor R(t) varies with the cosmic time, which brings to the magnetic field the effect of a geometric amplification. ∗ e-mail: marcelo [email protected] † internet: [email protected] ‡ internet: [email protected]

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

A New Version of Dirac’s Æther and Its Cosmological Applications

We propose a new formulation for the Æther of Dirac based on a lagrangian approach. We analyse how the presence of a particular self-interaction term in the lagrangian lead us to a description of the æther as being a medium with conductivity which is governed by macroscopic Maxwell equations with a polarization tensor Mαβ depending on the vector potential. These results are then applied to the ...

متن کامل

Adiabatic Geometrical Phase for Scalar Fields in a Curved Spacetime

A convenient framework is developed to generalize Berry’s investigation of the adiabatic geometrical phase for a classical relativistic charged scalar field in a curved background spacetime which is minimally coupled to electromagnetism and an arbitrary (non-electromagnetic) scalar potential. The general formalism which is applicable for any scalar field equation which involves time derivatives...

متن کامل

M ay 2 00 9 Cosmic dynamo analogue and decay of magnetic fields in 3 D Ricci flows May 13 , 2009

Magnetic curvature effects, investigated by Barrow and Tsagas (BT) [Phys Rev D 77,(2008)],as a mechanism for magnetic field decay in open Friedmann universes (Λ < 0), are applied to dynamo geometric Ricci flows in 3D curved substrate in laboratory. By simple derivation, a covariant three-dimensional magnetic self-induced equation, presence of these curvature effects, indicates that de Sitter co...

متن کامل

Advances on String Theory in Curved Space Times

String Quantum Gravity is motivated and introduced. Advances in the study of the classical and quantum string dynamics in curved spacetime are reported : In 1987, we started a programme [1] to study the string dynamics in curved spacetime and its associated physical phenomena. This study revealed new insights and new physical phenomena with respect to string propagation in flat spacetime (and w...

متن کامل

Stress Analysis of Magneto Thermoelastic and Induction Magnetic Filed in FGM Hallow Sphere

In this paper a closed form solution for one-dimensional magnetothermoelastic problem in a functionally graded material (FGM) hollow sphere placed in a uniform magnetic field and temperature field subjected to an internal pressure is obtained using the theory of magnetothermoelasticity. Hyper-geometric functions are employed to solve the governing equation. The material properties through the g...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2002