Search

Your search keyword '"Rezaei, Zahra"' showing total 2 results
Start Over "Rezaei, Zahra" Topic fluctuations (physics)
2 results on '"Rezaei, Zahra"'

1. The effect of Dirac phase on acoustic vortex in media with screw dislocation.

Author

Torabi, Reza and Rezaei, Zahra

Subjects
*DIRAC function, *SCREW dislocations, *LASER beams, *ANGULAR momentum (Mechanics), *STRENGTH of materials, *FLUCTUATIONS (Physics)
Abstract

Abstract: We study acoustic vortex in media with screw dislocation using the Katanaev–Volovich theory of defects. It is shown that the screw dislocation affects the beamʼs orbital angular momentum and changes the acoustic vortex strength. This change is a manifestation of topological Dirac phase and is robust against fluctuations in the system. [Copyright &y& Elsevier]

Published
2013
Full Text
View/download PDF

2. Boundary super-deformations, boundary states, and tachyon condensation.

Author

Rezaei, Zahra

Subjects
*DEFORMATIONS (Mechanics), *TACHYONS, *CONDENSATION, *GAUGE field theory, *PARTICLES (Nuclear physics), *FLUCTUATIONS (Physics), *SUPERSYMMETRY
Abstract

The open string tachyon and U{\) gauge field as longitudinal fluctuations and the velocity as a transverse fluctuation of an arbitrary dimensional D-brane are considered as boundary deformations of a closed superstring free action. The path integral approach will be applied to calculate the corresponding generalized boundary states using supersymmetrized boundary actions. Obtaining the disk partition functions from the boundary states and studying the effect of tachyon condensation on both of them in the Neveu-Schwarz-Neveu-Schwarz and Ramond-Ramond sectors, leads to results that differ from the established ones. [ABSTRACT FROM AUTHOR]

Published
2012
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results