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Effekter av manglende Lorentz-invarians på Nambu-Goldstone bosoner
(Master thesis, 2015)I denne avhandlingen diskuterer vi symmetrier av feltteorier både med og uten Lorentz-invarians. Vi konstruerer en feltteori fri for interaksjoner som er invariant under den Euklidske gruppen E(2), har tilhørende Euler-Lagrange ... -
Efficiency of IllustrisTNG in modeling galaxy properties
(Master thesis, 2021)Kosmologiske hydrodynamiske simuleringer er kraftige verktøy i studier av galakseformasjon og utvikling. De nyeste moderne simuleringene som IllustrisTNG endrer grensene for hva som er mulig i moderne astrofysikk. Samtidig ... -
Efficient Encoding of the Weighted MAX k-CUT on a Quantum Computer Using QAOA
(Peer reviewed; Journal article, 2021)The weighted MAX k-CUT problem consists of finding a k-partition of a given weighted undirected graph G(V, E), such that the sum of the weights of the crossing edges is maximized. The problem is of particular interest as ... -
Efficient Enhancement of Blood–Brain Barrier Permeability Using Acoustic Cluster Therapy (ACT)
(Journal article; Peer reviewed, 2017)The blood-brain barrier (BBB) is a major obstacle in drug delivery for diseases of the brain, and today there is no standardized route to surpass it. One technique to locally and transiently disrupt the BBB, is focused ... -
Efficient half-harmonic generation of three-optical-cycle mid-IR frequency comb around 4 µm using OP-GaP
(Journal article; Peer reviewed, 2018)We report a broadband mid-infrared frequency comb with three-optical-cycle pulse duration centered around 4.2 µm, via half-harmonic generation using orientation-patterned GaP (OP-GaP) with ~43% conversion efficiency. We ... -
Efficient high-energy Raman soliton generation in a Tm:doped large mode area fiber amplifier
(Peer reviewed; Journal article, 2022)We report the Tm-doped all-fiber MOPA based on a LMA active fiber generating Raman solitons tunable in the range 1970-2300 nm directly from the LMA fiber. By tuning the chirp of the input pulse we reached more than 90 % ... -
Efficient ultrafast field-driven spin current generation for spintronic terahertz frequency conversion
(Peer reviewed; Journal article, 2023)Efficient generation and control of spin currents launched by terahertz (THz) radiation with subsequent ultrafast spin-to-charge conversion is the current challenge for the next generation of high-speed communication and ... -
Efficient ultrafast field-driven spin current generation for spintronic terahertz frequency conversion
(Peer reviewed; Journal article, 2023)Efficient generation and control of spin currents launched by terahertz (THz) radiation with subsequent ultrafast spin-to-charge conversion is the current challenge for the next generation of high-speed communication and ... -
Einstein Gravity with Non-minimally Coupled Scalar Fields
(Master thesis, 2018)A Huggins term has been introduced to the Hilbert-Einstein model and its effect on the scale factor, a scalar field and Hubble parameter has been studied numerically. By comparing the result of a non-zero and a zero coupling ... -
Elastic Full Waveform Inversion of Synthetic Data: Marmousi2 Model Test Study
(Master thesis, 2014)Full waveform inversion (FWI) is a computationally extensive technique used to obtain estimates of subsurface rock parameters from seismic data. Initial models are iteratively improved by fitting forward modeled data to ... -
Electric and magnetic signatures of boundary states in topological insulators and superconductors
(Doctoral theses at NTNU;2017:271, Doctoral thesis, 2017)This thesis is based on original research that was carried out in the field of topological phases in quantum condensed matter physics. The results have been published in five papers in Physical Review B, which form the ... -
Electric Control of Skyrmion Dynamics and Spin Torque Oscillators in Magnetic Materials with Inversion Asymmetry
(Master thesis, 2016)In this thesis the skyrmion velocity in the presence of spin-transfer torques, Rashba spin-orbit coupling and a constant electric field gradient is derived analytically based on a collective coordinate approach in the ... -
Electric control of superconducting transition through a spin-orbit coupled interface
(Journal article; Peer reviewed, 2016)We demonstrate theoretically all-electric control of the superconducting transition temperature using a device comprised of a conventional superconductor, a ferromagnetic insulator, and semiconducting layers with intrinsic ... -
Electric field control of magnon-induced magnetization dynamics in multiferroics
(Journal article; Peer reviewed, 2016)We consider theoretically the effect of an inhomogeneous magnetoelectric coupling on the magnon-induced dynamics of a ferromagnet. The magnon-mediated magnetoelectric torque affects both the homogeneous magnetization and ... -
Electric field nematic alignment of fluorohectorite clay particles in oligomeric matrices
(Journal article, 2013)We study the behavior of fluorohectorite synthetic clay particles dispersed in paraffin wax. We report wide-angle x-ray scattering related to electric-field-induced alignment of the embedded clay particles. The development ... -
Electric stress-induced slip lines in jammed particle monolayers
(Peer reviewed; Journal article, 2016)Drops fully covered by particles, so called Pickering emulsion drops, are used to stabilize emulsions and are ideal templates for producing particles and advanced capsules. Recent studies show how electrohydrodynamic ... -
Electric-field-induced annihilation of localized gap defect states in amorphous phase-change memory materials
(Peer reviewed; Journal article, 2022)Structural relaxation of amorphous phase-change-memory materials has been attributed to defect-state annihilation from the band gap, leading to a time-dependent drift in the electrical resistance, which hinders the development ... -
Electric-field-induced structuring and rheological properties of kaolinite and halloysite
(Journal article, 2013)Electric-field-induced structuring of kaolinite and halloysite particles was studied in respect to their electrorheological (ER) response in silicone oil and in paraffin dispersions. The structural and morphological ... -
Electric-stress-induced Slip Lines in Jammed Particle Monolayers
(Journal article; Peer reviewed, 2016)Drops fully covered by particles, so called Pickering emulsion drops, are used to stabilize emulsions and are ideal templates for producing particles and advanced capsules. Recent studies show how electrohydrodynamic ... -
Electrical and thermal stability of Al-Cu welds: Performance benchmarking of the hybrid metal extrusion and bonding process
(Peer reviewed; Journal article, 2022)Advances in joining processes for aluminum and copper are sought after to facilitate the greater adoption of aluminum in electrical applications. Aluminum's chemical affinity to copper causes the joining and lifetime of ...