Thesis (Bachelor of Science in Physics)
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A two loop test of Matrix Big Bang Model
(Brac University, 202006)In this thesis we expand the effective action for the Matrix Big Bang presented in [9, 10] and indicate the interaction terms. Then we compute the two loop effective potential of this Matrix Big Bang model. We show that ... 
Review and application of the BenderWu Mathematica Package
(Brac University, 201812)This thesis is the application of the BenderWu Mathematica package to di erent physical systems. The code was developed to calculate wave function and energy data of higher order perturbation theory in quantum mechanics. The ... 
Nonlocal gravitational interactions and the black hole information paradox
(Brac University, 201912)This thesis looks into Nonlocal gravitational interactions that hawking radiated quanta’s from Black holes might possess. We shall first explain Hawking’s original calculation in [1], and how such a process would lead to ... 
Quantisation of Black hole horizon area and multipartite entanglement of Black hole information subsystems
(Brac University, 201912)We formulate a model consisting of multipartite entanglement that helps provide a physical significance to the BekensteinHawking entropy obtained after quantising the horizon area of a black hole as proposed by Jacob ... 
Perturbations on time dependent Orbifold Singularities
(Brac University, 201912)We start with the standard timedependent backgrounds such as the geometry and dynamics of FreidmannRobertsonWalker(FRW) cosmologies. First, we discuss the dynamics and geometry of FRW cosmologies. Then we introduce ... 
Nonperturbative phenomena in field theory and gravity, and use of Borel summation to capture nonperturbative information
(BRAC University, 201712)This thesis addresses nonperturbative phenomena and techniques to analyze nonperturbative problems. First, we discuss the simplest nonperturbative example in quantum gravity: blackholes, and how they nonperturbatively ... 
Review of Einstein field equation solution rotational and nonrotational black holes
(BRAC University, 2017)The origin of gravitational theory of relativity includes the discussion of Sir. Isaac Newton and Einstein’s theory of relativity. A brief derivation is introduced about the spherically symmetric solution of Einstein’s ... 
Baryon acoustic oscillation and LSS formation in the nascent universe
(BRAC University, 2017)The Cosmic Microwave Background Radiation (CMBR) and cosmological redshift are together regarded as the best available evidence for the Big Bang theory. Measurements of this radiation have made the inflationary Big Bang ... 
The AdSCFT correspondence and the blackhole information theory paradox
(BRAC University, 2017)This thesis discusses the role of AdS/CFT correspondence in highenergy physics. It concentrates on studying the mathematical black holes in various backgrounds, particularly in the anti deSitter(AdS) space. In this ... 
On some general relativistic compact anisotropic charged stellar models
(BRAC University, 20150715)With the presence of electric charge and pressure anisotropy some anisotropic stellar models have been developed. An algorithm presented by Herrera et al. (Phys. Rev, D 77, 027502 (2008)) to generate static spherically ... 
Calculating the pion contribution to nucleon selfenergy using chiral effective thermal ﬁeld theory
(BRAC University, 2016)Effective ﬁeld theories have proven to be efﬁcient tools for studying physics at length scales longer than that which is typical. Chiral Perturbation Theory is one of these EFTs which physicists rely on heavily to study ... 
A review of Eikonal approximation and recent applications
(BRAC University, 201603) 
Supersymmetric gauge theory: an application of group theory in high energy physics and starobinsky model of cosmological ination
(BRAC University, 2016)This thesis discusses the general role of symmetry in highenergy physics. It concentrates on the role of fermionic symmetry generators, which generate the symmetry known as supersymmetry. An extensive discussion of ... 
Simulation of electronic properties of a quantum dot in transistor geometry at varying temperatures
(BRAC University, 201603)Electrical conduction is the ow of electron due to a force applied by an electric eld. In bulk material, conduction process obeys Ohm's law. The law states that current is proportional to applied voltage. But nanosized ... 
False vacuum decay exact computation of the classical bounce
(BRAC University, 201601)This thesis reviews the exact numerical computation of the classical bounce solution in the false vacuum decay for a quartic scalar eld potential which is o set by an external source. The decay rate in a semiclassical ...