Bachelor of Science in Physics
http://hdl.handle.net/10361/5147
Tue, 30 Nov 2021 19:17:47 GMT2021-11-30T19:17:47ZQuantum information theory and the black hole information paradox
http://hdl.handle.net/10361/15431
Quantum information theory and the black hole information paradox
Rahman, Md Reshad Ur; Munshi, Josh
This thesis discusses the information-theoretic concepts of Black Holes. Its primary
focus is describing black hole dynamics with unitary operators within the
perspective of quantum information theory and AdS/CFT arguments on why
black hole evaporation is likely to be unitary. This thesis also provides mathematical
backgrounds of classical black holes and quantum field theory in curved
space. Then we introduced entanglement entropy and compared the shell of photons
in a pure state to free harmonic oscillators. Afterward, we introduce an interaction
term in the hamiltonian for t > 0, which we call a sudden quench. Finally,
we have calculated the time evolved entanglement entropy for N-quenched oscillators
and graphically demonstrated the entanglement entropy for various N.
We want to model the time dependent entanglement entropy S1 between the internal
and emitted radiation of a black hole. As for a future project, we want
to regularize a quantum field to the Hamiltonian of N-quenched oscillators and
compute the entanglement entropy S2 that results from tracing degrees of freedom
inside an imaginary sphere. Hence, as S1 increases with time as the photons’
shell begins to collapse, we have a comparable situation, using the ideas
about holography, with the time evolution of the S2.
This thesis is submitted in a partial fulfillment of the requirements for the degree of Bachelor of Science in Physics.; Cataloged from PDF version of thesis.; Includes bibliographical references (pages 78-79).
Thu, 01 Oct 2020 00:00:00 GMThttp://hdl.handle.net/10361/154312020-10-01T00:00:00ZAn Introduction to Cosmic Inflation Theory
http://hdl.handle.net/10361/15066
An Introduction to Cosmic Inflation Theory
Chowdhury, Fabliha Afroza
his thesis provides a detailed derivation of the Friedmann Equations in the frame work of general relativity and for an FLRW universe. An introduction to the theory
of cosmic inflation, the motivations for it, and, the scalar field dynamics associated
with inflation presently follows. It further attempts to discuss models of inflation
and endeavors to make a classical introduction to cosmological perturbations gen erated in the course of inflation, which are thought to be the originator of structure
in the universe. Our metric signature is (+, −, −, −) and we will use the Einstein
summation convention.
This thesis is submitted in a partial fulfillment of the requirements for the degree of Bachelor of Science in Physics.; Cataloged from PDF version of thesis.; Includes bibliographical references (page 41).
Fri, 01 Jan 2021 00:00:00 GMThttp://hdl.handle.net/10361/150662021-01-01T00:00:00ZA two loop test of Matrix Big Bang Model
http://hdl.handle.net/10361/14109
A two loop test of Matrix Big Bang Model
Shuvo, Md Shaikot Jahan
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 this two loop effective potentials are attractive near
the big bang and turns off very rapidly in late time. The form of the potential indicates that
they are coming from a multi-D-brane contribution establishing a connection between late
time physics and cosmological singularity.
This thesis is submitted in a partial fulfillment of the requirements for the degree of Bachelor of Science in Physics.; Cataloged from PDF version of thesis.; Includes bibliographical references (pages 111-112).
Mon, 01 Jun 2020 00:00:00 GMThttp://hdl.handle.net/10361/141092020-06-01T00:00:00ZReview and application of the BenderWu Mathematica Package
http://hdl.handle.net/10361/14093
Review and application of the BenderWu Mathematica Package
Ahsan, Tasni
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 review is done by practical application of the code on the potentials in the
examples accompanying the package, as well as the application of it on novel
potentials of various forms. The development of the recursion relation behind
the code, and the generalization of the relation are also discussed. Finally,
the relation between higher order perturbation theory and non-perturbative
information encoded in it is also discussed.
This thesis is submitted in a partial fulfillment of the requirements for the degree of Bachelor of Science in Physics.; Cataloged from PDF version of thesis.; Includes bibliographical references (page 56).
Sat, 01 Dec 2018 00:00:00 GMThttp://hdl.handle.net/10361/140932018-12-01T00:00:00Z