Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 48 for “"Orbital angular momentum"”.
-
Physical-Security for Wireless with Orbital Angular Momentum Wave
As technology progresses and an ever-increasing number of digital data are transmitted day to day, securing data has emerged as a major field of research. Conventional cryptography in higher layers of protocol stack has been studied as a data protection technique from an unauthorized party by …
-
Orbital Angular Momentum Microlasers: From The First Demonstration To Ultrafast Tunability
Orbital angular momentum (OAM) carried by structured vortex light establishes a new information dimension, thereby promising high capacity optical communication and high performance computation in both classical and quantum regimes. Meanwhile, laser is the key driver in the field of optics and …
-
Orbital angular momentum and fully structured light in nonlinear media and cavities
… the FSL structure. Where the beam carries a net orbital angular momentum we observe a rotation in the structure. We detail how the angular velocity of the Turing structure can be controlled by careful selection of the parameters of the FSL beams.
-
Orbital angular momentum encoding/decoding of 2D images for scalable multiview colour displays
… with theoretically unlimited state space, orbital angular momentum (OAM) modes may be an alternative to the conventional multiview approaches and potentially project more images. This research involves exploring the possibility of encoding/decoding off-axis points in 2D images with OAM …
-
Quantum transport properties of charge, spin and orbital angular momentum in two-dimensional materials
… propriedades de transporte de spin e de momento angular orbital em sistemas bidimensionais multi-orbitais. Examinamos duas classes distintas de materiais: sistemas de banda p, representados pelo recém sintetizado bismutheno/SiC (juntamente com seus análogos do grupo-VA) e os dicalcogenatos de …
-
Magnetic susceptibility and knight shift measurements in aluminum-rare earth alloys
… coupling between the total spin and The total orbital angular momentum of f electrons is dominant in determining the size of localized moments on solutes. The maximum magnitude of localized moments observed was over 10ub which is impossible without a contribution to the magnetic moment from …
-
Quantum optical state comparison amplification
… part of the thesis we propose a new form of orbital angular momentum and angle states. These states consist of a sum of overlapping Gaussians in the angular position representation. We calculated both the uncertainty product and the entropic uncertainty relation for orbital angular momentum …
-
Two applications of Berry's phase in fermionic field theory
… in gauge field theory and the intrinsic orbital angular momentum in superfluid $\sp3$He-A.
-
Consequences of spontaneous and anomalous symmetry breaking for the orbital and mass flow hydrodynamics of helium-3
… three problems associated with the mass flow and orbital hydrodynamics of $\sp3$He-A. The first concerns the form of the T = 0 mass current in local equilibrium; the second is a paradox associated with the non-conservation of superfluid linear momentum at T = 0; and the third involves a …
-
Machine-learning-assisted state and gate engineering for quantum technologies
… quantum systems provided by the orbital angular momentum and polarisation degrees of freedom of light. We devise a protocol involving quantum walks to implement arbitrary states by only making use of the possibility to couple polarisation and orbital angular momentum through …
-
Two applications of Berry's phase in fermionic field theory
… in gauge field theory and the intrinsic orbital angular momentum in superftuid 3He-A. Chapter 1 is a brief introduction. Chapter 2 reviews Berry's Phase and several toy models. Effective actions are calculated for two models in gradient expansions and the role of a geometric term is …
-
Understanding dark matter halos with tidal caustics
… between galaxies with a high mass ratio and low orbital angular momentum are studied. The interactions scatter the material from the smaller galaxy into structures with distinctive dynamics and morphology, including high local densities and a simple density profile related to properties of the …
-
Transverse Spin Structure of the Proton Studied in Semi–inclusive DIS
… the probability to find a quark with a certain momentum inside the nucleon), the quark helicity distribution and the quark transversity distribution. The latter two are the differences of the number of quarks with their spins aligned and antialigned with the nucleon spin whose direction is …
-
Rotation-electronic interaction in the 3p-complex Rydberg state of water
… with terms representing electronic spin and orbital angular momentum effects. Criteria for assigning symmetry species to the rotational energy levels, following Houganfs scheme that uses the full molecular group,are established and given in the form of a table. This is particularly suitable …
-
Bottomonium Spectroscopy at Belle: Studies of Radiative and Hadronic Transitions
… radial quantum number $n$, one unit of total angular momentum $(J=1)$, and orbital angular momentum $L=0$, labeled $Upsilon(nS)$---are copiously produced in electron--positron $(epem)$ collisions. The Belle Collaboration is a high energy physics experiment located at the KEKB B-Factory epem …
-
Determination of the gluon polarisation in the nucleon using hadron pairs with high transverse momentum at COMPASS
… been measured, the contributions from gluons and orbital angular momentum are not constrained. <br> <br>This thesis is dedicated to the determination of the gluon polarisation in the nucleon. The analysis is based on the data taken by the COMPASS experiment at CERN during the years 2002 and 2003. …
-
Using 2D vortex plasmons/phonon polaritons to control electronic selection rules
The discovery of orbital angular momentum (OAM) sustaining modes established a new degree of freedom by which to control not only the flow of light but also its interaction with matter. However, OAM sustaining modes have yet to be used to control the quantum dynamics of an electron in an atom or …
-
Surface-emitting lasers for communications: novel metal-cavity microlasers and high-contrast-grating tunable VCSELs
… beam-conversion, and generation of photon orbital angular momentum are achieved. Our optical model is integrated with our laser cavity model and the rate equation model to predict the temperature-dependent voltage tunable light output intensity and spectra. Future design and experimental …
-
Quantum information applications of frequency upconversion
… of freedom such as polarization, time-bin, or orbital angular momentum states to enlarge the usable single-photon Hilbert space and create a rich vocabulary for transmission of quantum information.
-
A study of polarized Λ production in deep inelastic postron scattering
… other sources of nuclear spin, such as net orbital angular momentum or gluon spin. While some explanations may have been found for this spin crisis, it nonetheless sparked interest in spin phenomena in many other areas of particle and nuclear physics. For example, since the spin of the …
Page 1 of 3