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.
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Showing 1 to 20 of 83 for “"Majorana"”.
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Majorana qubits in non-Abelian topological superconductors
… with exotic quasiparticle excitations, namely Majorana fermions, which obey non-Abelian quantum statistics. They are exploited as hardware platforms for fault-tolerant topological quantum computing. In this thesis, we primarily study the non-topological decoherence ef- fects existing in …
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Majorana-based Topological Quantum Algorithms in Magnet-Superconductor Hybrid Structures
Majorana zero modes harbored by topological superconductors may be the key ingredient for the realization of fault-tolerant quantum computing and topologically protected quantum devices. Magnet-superconductor hybrid (MSH) systems have proven to be an experimentally versatile platform for quantum …
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Συγκριτική μεταβολομική μελέτη δειγμάτων Origanum majorana L. από διαφορετικές καλλιεργητικές διαχειρίσεις
… στο φυτοχημικό προφίλ δειγμάτων Origanum majorana L. Συγκεκριμένα, διερευνήθηκε η επίδραση διαφυλλικών ψεκασμών με δύο διαφορετικές συγκεντρώσεις με Fe και δύο με Zn, σε συνδυασμό με επτά διαφορετικούς τρόπους λίπανσης. Τα δείγματα αναλύθηκαν με τη χρήση συστήματος …
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Magic and Majorana Fermions in Quantum Computing, Topological Matter, and Dynamics
… explores the resource of “magic”, and the use of Majorana fermions, in quantum many-body physics and quantum computing. Along with other quantum resources, magic helps determine the advantage that a quantum circuit can display over classical computation. For the components of the quantum computer …
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MAJORANA FERMION IN TOPOLOGICAL SUPERCONDUCTOR AND MOTT‐SUPERFLUID TRANSITION IN CIRCUIT‐QED SYSTEM
… contains two parts. In Part I, we study the Majorana fermion and its transport in the topological superconductors. In Chapter 2, we investigate the edge states and the vortex core states in the spin-singlet superconductor with Rashba and Dresselhaus (110) spin-orbit couplings. In Chapter 3, …
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Topological Quantum Computing with Majorana Zero Mode Qubits: Theory and State of the Art
… toward research into materials that support Majorana Zero Mode (MZM) states for use as qubits, and the logic gates that allow them to be fused and braided together to encode data and allow them to evolve in quantum calculations. This capstone project first reviews the basics of Quantum …
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First Step into A New Physics Realm: Search for the Majorana Nature of Neutrinos in the Inverted Mass Ordering Region
… decay (0𝜈𝛽𝛽) is the only way to prove the Majorana nature of neutrinos and is thus a major area of interest for neutrino physics. Discovering 0𝜈𝛽𝛽 and measuring its half-life will be the first solid evidence for physics beyond the Standard Model (BSM) and lead to a plethora of new …
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Engineering superconductivity in ballistic semiconductor nanowires
… proposals to use 1D nanostructure to realize Majorana zero modes, quasiparticles that are relevant for topological quantum computing, many groups have attempted to engineer these modes in hybrid semiconductor-superconductor devices. While evidence for Majorana bound states in nanowires has …
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CP violation in the grimus-neufeld model /
… Grimus-Neufeld model, which introduces a single Majorana neutrino and an additional Higgs doublet. The model, originally created to describe neutrino mass generation, might also provide new sources for CP violating behavior. The addition of Majorana neutrino might allow the application of …
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Examining mean-field approximations and Bogoliubov-de Gennes (BdG) equations for topological quantum computing - some considerations on the conceptual basis of Majorana zero modes in p+ip superconductors
The current theoretical framework for studying Majorana zero modes (MZM) in superconductors and its application for topological quantum computing is based on mean-field approximations and is derived from solutions to BdG equations. In this framework, particle number conservation is broken and …
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Topological phases, non-equilibrium dynamics and parallels of black hole phenomena in condensed matter
This dissertation deals with two broad topics - Majorana modes in Kitaev chain and parallels of black hole phenomena in the quantum Hall effect. Majorana modes in topological superconductors are of fundamental importance as realizations of real solutions to the Dirac equation and for their anyonic …
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Rotational Symmetry and Phase Dynamics in Topological Superconductors
… tied to topological superconductors are Majorana bound states. These are neutral zero-energy quasiparticles, localised to boundaries or defects, that are highly sought after as ingredients for quantum computation. In the first part of this thesis, we consider two-dimensional crystalline …
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Classification of entanglement in symmetric states
… An essential tool for this analysis is the Majorana representation, a generalisation of the single-qubit Bloch sphere representation, which allows for a unique representation of symmetric n qubit states by n points on the surface of a sphere. Here this representation is employed to search …
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Quantum Transport in Topological Phases of Matter
… starting by presenting a new method for creating Majorana zero modes using segmented Fermi surface. This approach, based on the Fermi surface of Bogoliubov quasiparticles allows for the reduction of the magnetic field required to induce a topological phase transition and reduces the number of …
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Studies on the effect of noise in boundary quantum phase transitions
… achievements, we study the stabilization of a Majorana zero mode with the quantum frustration in a dissipative resonant level model. The Majorana zero mode is known to be unstable against the coupling to its partner at the other end of the Majorana hosted nanowire.</p><p>We prove that the …
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Search for neutrinoless double beta decay of ¹¹⁶Cd and ⁸²Se and calorimeter simulations for the SuperNEMO experiment
… ⁸²Se. These half-lives correspond to effective Majorana neutrino masses of m ≤ (4.33 - 5.54) eV and m ≤ (2.28 - 2.82) eV, respectively, in the light Majorana exchange mechanism.
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Investigation of current-phase relation in topological insulator Josephson junction
… junction (TIJJ). In a magnetic field, localized Majorana bound states (MBS) are predicted to exist at the core of Josephson vortices. One of the key characteristics of such MBS in TIJJ system is that they possess a 4π periodic CPR, instead of conventional 2π sinusoidal CPR. Our measurements of …
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Self-Consistent Study of Topological Superconductivity in Two-Dimensional Quasicrystals
… in a topological superconductor are zero-energy Majorana fermions. Majorana fermions are their own antiparticles and due to the non-Abelian exchange statistics that they obey, they open the door to new and powerful methods of topological quantum computing. Majorana fermions have been detected, …
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Collider phenomenology of heavy neutrinos
… mass through the lepton number violating Majorana mass term. There is another alternative way, commonly known as the inverse seesaw mechanism, where the small neutrino mass is obtained by the tiny lepton number violating parameters. In this work we investigate the signatures of such heavy …
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