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Showing 1 to 20 of 197 for “"Fermion"”.
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Scale of Fermion Mass Generation
… derived an analogous upper bound on the scale of fermion mass generation, proportional to v 2/mf, by considering the scattering of same-helicity fermions into pairs of longitudinal weak vector bosons in a theory without a standard Higgs boson. We show that there is no upper bound, beyond that on …
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Fermion Superfluidity and Confining Interactions
Submitted by Meng Tao (mengtao2@illinois.edu) on 2012-10-12T21:35:22Z No. of bitstreams: 1 Galal.pdf: 1144563 bytes, checksum: f9b1a0ba35c6d9dcc790d501020279df (MD5)
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Elementary excitations in heavy-fermion superconductors
… presented of the elementary excitations in heavy-fermion superconductors, under the hypothesis that the Cooper pairs are in a relative p-wave or d-wave. First, all p-wave and d-wave states are classified in the presence of strong spin-orbit coupling and crystal fields, which are important effects …
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Theoretical studies of heavy fermion materials
Thesis: Ph. D., Massachusetts Institute of Technology, Department of Physics, 1986
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Phänomenologische Konsequenzen der Fermion-Massenerzeugung in Substrukturmodellen
Der Higgsmechanismus erlaubt es, massive Fermionen in einer chiralen Eichtheorie, wie dem Standardmodell der Teilchenphysik, zu beschreiben. Allerdings bleiben dabei die Yukawa-Kopplungskonstanten und damit die Masseneigenwerte unbestimmt. Ein Ausgangspunkt für die Beschreibung des Massenspektrums …
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Defining, classifying and optimising fermion–qubit mappings
… for defining, classifying, and optimising fermion–qubit mappings, a crucial step in simulating fundamental physics on quantum computers. This work surveys the existing catalogue of fermion–qubit mappings, exposing gaps and devising new optimisation routines to aid fermionic simulation …
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The BCS - BEC Crossover in Ultracold Fermion Gases
… (BCS)-type superfluid of fermion pairs and a Bose-Einstein condensate (BEC) of tightly bound bosonic molecules can be attributed to the spontaneous breaking of global $U(1)$ gauge symmetry which underlies both quantum condensation phenomena. Recently much attention has been …
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High-Pressure Studies of Some Heavy Fermion Materials
… the results of measurements on three heavy fermion materials under pressure: CeSb2, YbPtBi and CeAgSb2. In Chapter 1, I give an introduction to the key concepts involved in this work, such as unconventional superconductivity, quantum critical points and quantum oscillations, and I explain …
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Conformal Boundaries, SPTs, and the Monopole-Fermion Problem
… dimensions, and their connection to the monopole-fermion problem in four dimensions, as well as to symmetry-protected topological phases in two and three dimensions. We begin by motivating the study of conformal boundary states for 2d fermions preserving chiral symmetries. Our main motivation is …
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Quantum Computation and Simulation using Fermion Pair Registers
… on realizing a large-scale quantum register of fermion pairs with a quantum gas microscope, in which tightly localized fermion pairs are used to encode qubits exhibiting long coherence time and robustness against laser intensity noise. In this thesis, we propose and analyze a new approach for …
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Fermion Quantum Field Theory In Black-hole Spacetimes
The need to construct a fermion quantum field theory in black-hole spacetimes is an acute one. The study of gravitational collapse necessitates the need of such. In this dissertation, we construct the theory of free fermions living on the static Schwarzschild black-hole and the rotating Kerr …
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Four-Fermion production at LEP using the OPAL detector
… energies between 183 and 209 GeV. <br>Four-fermion final states stemming from decays of the Z$gamma^*$ into <br>$ <br>m q ar{q}l^+l^-$, where l stands for electrons or muons, has been investigated. Cross-sections have been calculated for all centre-of-mass energies and compared to those …
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Coulomb Correlations in Equilibrium and Nonequilibrium Many -Fermion Systems
The importance of the field of Condensed Matter Physics can hardly be overstated. It deals with matter at everyday energies and with length and times scales in which complex processes are able to occur. It is a field in which much experimental and theoretical effort has been invested. New …
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Coulomb correlations in equilibrium and nonequilibrium many-Fermion systems
The importance of the field of Condensed Matter Physics can hardly be overstated. It deals with matter at everyday energies and with length and times scales in which complex processes are able to occur. It is a field in which much experimental and theoretical effort has been invested. New …
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Fermion pairing and correlations under a quantum gas microscope
… phases of quantum matter built from ultracold fermionic atoms trapped in an optical lattice, experimentally realizing the Fermi-Hubbard model. These fermionic atoms develop strong correlations as they tunnel and interact in the lattice potential. Using a novel bilayer quantum gas microscope, we …
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Interacting Ultracold Alkali Atomic Fermion Gases and Radio-Frequency Spectroscopy
… radio-frequency spectroscopy of multi component fermion gases. Rf experiments of 6Li and 40K are first reviewed. We show that rf experiments essentially measure spin correlation functions, and internal symmetries of the interparticle interactions constrain the rf spectrum through sum rules. We …
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Light scattering studies of heavy fermion and high Tc superconductors
… to probe the diverse excitation spectra of heavy fermion and high T c superconductors. Our studies of heavy fermion compounds principally demonstrate the efficacy of using light scattering techniques to probe spin fluctuations and crystal field excitations in metals. For example, light scattering …
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Flussgleichungen für das Anderson-Gitter zur Beschreibung von Schwer-Fermion-Systemen
… vorliegenden Arbeit wird die Physik von Schwer-Fermion-Systemen, die durch Lanthanid- und Aktinid-Übergangsmetallverbindungen realisiert werden, untersucht. Die Basis für eine theoretische Beschreibung bildet das Anderson-Gitter, welches das Wechselspiel freier Leitungselektronen und stark …
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Light Scattering Studies of Heavy Fermion and High T(c) Superconductors
… to probe the diverse excitation spectra of heavy fermion and high T$\sb{\rm c}$ superconductors.
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A study of Mac Dowell symmetry, conspiracy, and fermion Regge trajectories
… and the conspiracy constraints are derived for fermion Regge trajectory and residue functions. It is shown that two solutions of the constraints - analogous to the ""conspiratorial"" and ""evasive"" solutions for boson Regge poles - exist. The conspiratorial (M = 3/2) solution of the constraints …
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