Browsing Centre for High Energy Physics (CHEP) by Title
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Analytical MellinBarnes techniques with applications to twoloop SU(3) chiral perturbation theory and QED at higher loops
The present era is one of precision in particle physics. To account for the lacunae in the otherwise successful Standard Model, observables are calculated to high precision in various theoretical models, which are then ... 
Applications of Holography
This thesis consists of four parts. In the first part of the thesis, we investigate the phase structure of EinsteinMaxwellScalar system with a negative cosmological constant. For the conformally coupled scalar, an ... 
Applications of Moonshine Symmetry in String Theory
In this thesis we study the applications of Mathieu moonshine symmetry to compacti cations of supersymmetric string theories. These theories are compacti ed on a 6 dimensional manifold K3 T2. The main ingredient in ... 
Aspects of conformal field theories at finite temperature
In this thesis we have studied broadly two aspects of thermal field theory. We began by examining how the macroscopic system (described by relativistic hydrodynamics) behalves in presence of microscopic anomalies. We ... 
Aspects of Heavy Supersymmetry
The recent discovery of a Higgs boson with a mass around 125 GeV, taken together with experimental results from flavor factories, dark matter direct detection, and searches for SUSY particles in the LHC suggest that ... 
Aspects of Higher Spin Theories Conformal Field Theories and Holography
(20180530)This dissertation consist of three parts. The first part of the thesis is devoted to the study of gravity and higher spin gauge theories in 2+1 dimensions. We construct cosmological solutions of higher spin gravity in 2+1 ... 
Aspects of Holography and Quantum complexity
We begin with the Principle of holography and the AdS/CFT correspondence. We begin our investigations by considering the Principle of Holography, at the level of codimension1 screens. We argue that the mechanism of encoding ... 
Aspects of time dependence in quantum quenches
In this thesis we study the time dependence of correlators such as Green function, entanglement (Renyi) entropy and mutual information following quantum quench in Conformal Field Theories (CFTs) and their holographic duals ... 
Asymptotic Analysis of Multiscale, Multiloop Feynman Diagrams
It is very challenging to solve multiscale, multiloop Feynman diagrams analytically. The presence of different kinematic scales makes the computation of Feynman diagrams very difficult, sometimes impossible to get the ... 
Chiral Phase Transition Temperature in 3flavor QCD
The nature of the chiral phase transition in QCD with three massless flavors of quarks remains unresolved despite being studied for nearly four decades. This Ph.D. thesis is a study using Lattice QCD to determine the ... 
Complexity and Entanglement: From quantum gravity to manybody systems
In recent years, complexity and entanglement have emerged as two fundamental computational measures and played a significant role in shaping our understanding of various phenomena, from the geometric nature of quantum ... 
Conformal Bootstrap : Old and New
(20180525)Conformal Field Theories (CFT) are Quantum Field Theories characterized by enhanced (conformal) symmetries. They are interesting to Theoretical Physicists because they occur at critical points in phase transitions of various ... 
Direct and Indirect Search for New Physics at Colliders
The Standard Model (SM) of particle physics has been remarkably successful to describe strong, weak and electromagnetic forces of nature, as it has agreed with most of the experiments till date. However, there are still ... 
An Efficient Quantum Algorithm and Circuit to Generate Eigenstates Of SU(2) and SU(3) Representations
(20180418)Many quantum computation algorithms, and processes like measurement based quantum computing, require the initial state of the quantum computer to be an eigenstate of a specific unitary operator. Here we study how quantum ... 
Efficient Quantum Algorithms for Linear Algebra Problems
Many simulation problems can be expressed as time evolution under specific interactions, from some simple initial state to a final state whose properties are to be investigated. In this context, the Hamiltonian evolution ... 
Electronic Transport in LowDimensional Systems Quantum Dots, Quantum Wires And Topological Insulators
(20180405)This thesis presents the work done on electronic transport in various interacting and noninteracting systems in one and two dimensions. The systems under study are: an interacting quantum dot [1], a noninteracting quantum ... 
Entanglement properties of gauge theories and the graviton.
Entanglement entropy is emerging as a useful quantity to study critical phenomena in quantum systems, black holes physics, and holography. In this presentation, we discuss entanglement properties of gauge theories and ... 
Explorations in Quantum Machine Learning
Quantum Machine Learning is a rapidly developing field. In part 1 of this thesis, I benchmark common QML methods with the most popular datasets used in classical ML. I compare results from quantum and classical methods and ... 
Explorations in the Space of SMatrices
Smatrix is one of the fundamental observables of the quantum theory of relativistic particles. The quantum dynamics of relativistic particles can be abstractly understood in terms of Smatrix bypassing a Lagrangian ... 
Exponential Resummation of QCD at Finite Chemical Potential
A comprehensive study of the QCD phase diagram is one of the challenging and open problems in high energy physics. Having significant astrophysical implications, this is also important in constructing the chronological ...