Browsing Division of Physical and Mathematical Sciences by Title
Now showing items 651-670 of 959
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Quantized heat flow probing thermal equilibration and edge structures of quantum Hall phases in graphene
In condensed matter physics, usually, phases are described using Landau’s approach, which characterizes the phases in terms of underlying symmetries that are spontaneously broken. Over the past few decades, a different ... -
Quantum Algorithms Using Nuclear Magnetic Resonance Quantum Information Processor
(2009-05-12)The present work, briefly described below, consists of implementation of several quantum algorithms in an NMR Quantum Information Processor. Game theory gives us mathematical tools to analyze situations of conflict between ... -
Quantum and classical hardware development for superconducting qubits
The journey toward realizing practical quantum computing involves overcoming critical challenges in qubit architecture, robust gate performance, and scalable control systems. This thesis addresses these challenges through ... -
Quantum capacitance and noise measurements in van der Waals heterostructures
The discovery of graphene has revolutionized the field of condensed matter physics and opened new prospects for a wide range of other two-dimensional materials. Further with the advancement of fabrication techniques, one ... -
Quantum dynamics of weak measurements: Understanding the Born rule and applying weak error correction
Projective measurement is used as a fundamental axiom in quantum mechanics, even though it is discontinuous and cannot predict which measured operator eigen state will be observed in which experimental run. The probabilistic ... -
Quantum Glass, Spin Liquids, Fragmentation, Fractional Orbitals, and Flat Band Physics in Classical and Quantum Spin Models
The world of many-body physics, encompassing both classical and quantum systems, is a breeding ground for novel phases of matter. Recent attention revolves around exotic phases characterized by fractionalized particles, ... -
Quantum Information Processing By NMR : Quantum State Discrimination, Hadamard Spectroscopy, Liouville Space Search, Use Of Geometric Phase For Gates And Algorithms
(2011-02-22)The progess in NMRQIP can be outlined in to four parts.1) Implementation of theoretical protocols on small number of qubits. 2) Demonstration of QIP on various NMR systems. 3) Designing and implementing the algorithms for ... -
Quantum Information Processing By NMR : Relaxation Of Pseudo Pure States, Geometric Phases And Algorithms
(2009-04-13)This thesis focuses on two aspects of Quantum Information Processing (QIP) and contains experimental implementation by Nuclear Magnetic Resonance (NMR) spectroscopy. The two aspects are: (i) development of novel methodologies ... -
Quantum oscillation in band insulators and properties of non-equilibrium steady states in disordered insulators
Starting with the experiment on Kondo insulator SmB6 , which shows 1/B-periodic oscillations despite the absence of gapless electronic excitations in bulk, the candidate insulators showing quantum oscillation (QO) are on ... -
Quantum Simulations by NMR : Applications to Small Spin Chains and Ising Spin Systems
(2017-11-22)Quantum simulations, where controllable quantum systems are used to simulate other quantum systems, originally proposed by Richard Feynman, are one of the most remarkable applications of quantum information science. Compared ... -
Quantum Spin Chains And Luttinger Liquids With Junctions : Analytical And Numerical Studies
(2010-03-09)We present in this thesis a series of studies on the physical properties of some one dimensional systems. In particular we study the low energy properties of various spin chains and a junction of Luttinger wires. For spin ... -
Quantum transport in Graphene Moire Superlattice and p-n junction
The discovery of graphene has revolutionized the field of mesoscopic condensed matter physics. It has started a new field of van-der Waals heterostructure in which different two-dimensional materials including graphene can ... -
Quantum walks and spatial search on regular graph
Random walks and algorithms based upon them are used widely to explore large state spaces that arise while studying physical systems. In this thesis, we will discuss some quantum generalizations of such algorithms and study ... -
Quasi-analytic Functions, Spherical Means, and Uncertainty Principles on Heisenberg Groups and Symmetric Spaces
This thesis has two parts. The first part revolves around certain theorems related to an uncertainty principle and quasi-analyticity. In contrast, the second part reflects a different mathematical theme, focusing on the ... -
A Radio Study Of Gas Loss Processes In Nearby Galaxies
(2008-10-17)The work in this thesis involves detailed multi-frequency radio continuum (from 325 MHz to 15 GHz) and Hi spectroscopic studies of a few represent tative nearby galaxies which are experiencing gas-loss from their disks ... -
Raman Spectroscopy Instrumentation and Its Application in Deep Tissue Imaging
Raman spectroscopy is based on inelastic scattering, which gives molecular information. Due to its weak nature, for a long-time Raman spectroscopy was limited to only study of molecular interactions, but with the advancement ... -
Raman Spectroscopy Of Graphene And Graphene Analogue MoS2 Transistors
(2016-06-18)The thesis presents experimental studies of device characteristics and vibrational properties of atomic layer thin graphene and molybdenum disulphide (MoS2). We carried out Raman spectroscopic studies on field effect ... -
Raman Studies of Topological Crystalline Insulator, Natural Heterostructures, Excitonic Insulator and Layered Oxide Under Pressure
The theme of this thesis is Raman spectroscopic study of a variety of exotic states of matter under extreme conditions, such as, hydrostatic pressure as high as 25 GPa and a wide temperature range from 77 K to 390 K. Raman ...