# The Modern Physics of Compact Stars and Relativistic Gravity 2017

18-22 September 2017
Yerevan, Armenia
Etc/GMT+4 timezone

## Induced fermionic current by a magnetic tube in the cosmic spacetime

20 Sep 2017, 09:00
40m
Yerevan, Armenia

#### Yerevan, Armenia

Department of Physics, Alex Manoogian str. 1, Yerevan, Armenia

### Speaker

Prof. Eugenio Bezerra de Mello (Universidade Federal da Paraíba)

### Description

In this talk we examine the vacuum fermionic current induced by a magnetic field confined in a cylindrical tube of finite radius a in cosmic string spacetime. Three distinct configurations of magnetic fields are taken into account:

∙ a cylindrical shell of radius a,
∙ a magnetic field proportional to 1/r,
∙ a constant magnetic field.

In these three cases, the axis of the infinitely long tube coincides with the cosmic string. Our main objective is to analyze the induced azimuthal fermionic current density outside the tube. We show that this current can be decomposed into a part corresponding to a zero-thickness magnetic flux running along the string in addition to a core-induced contribution. The latter explicitly depends on the specific magnetic fields configurations considered.

Type of contribution Invited talk

### Primary author

Prof. Eugenio Bezerra de Mello (Universidade Federal da Paraíba)