Probing gauge theories: Exact results and holographic computations
... order to produce a consistent theory at the quantum level we need to require the electric and magnetic charges to satisfy Dirac’s quantization condition [1] (in natural units) qe qm = 2πn ; n ∈ Z ...
... order to produce a consistent theory at the quantum level we need to require the electric and magnetic charges to satisfy Dirac’s quantization condition [1] (in natural units) qe qm = 2πn ; n ∈ Z ...
Effective Field Theories in Cosmology - SUrface
... either additional degrees of freedom besides the graviton or violations of Lorentz symmetry. We also review the mechanism which leads to the generation of primordial fluctuations during inflation. In chapter 3, we study theories of gravitation which admit violations of Lorentz symmetry. By extending ...
... either additional degrees of freedom besides the graviton or violations of Lorentz symmetry. We also review the mechanism which leads to the generation of primordial fluctuations during inflation. In chapter 3, we study theories of gravitation which admit violations of Lorentz symmetry. By extending ...
Pair Production and the Light-front Vacuum
... special theory of relativity and quantum mechanics in the late 1920s (Dirac, 1927), quantum vacuum has emerged as an extremely interesting medium with remarkable properties to investigate. QED has been extremely successful in explaining the physical phenomena involving the interaction between light ...
... special theory of relativity and quantum mechanics in the late 1920s (Dirac, 1927), quantum vacuum has emerged as an extremely interesting medium with remarkable properties to investigate. QED has been extremely successful in explaining the physical phenomena involving the interaction between light ...
BARRIER PENETRATION AND INSTANTONS J. ZINN - IPhT
... Hamiltonian has a discrete space symmetry, but the potential has minima at points that are not group invariant. The positions of the degenerate minima are then related by symmetry group transformations. Classically, the minimal energy solutions correspond to particles at rest in any one of the minim ...
... Hamiltonian has a discrete space symmetry, but the potential has minima at points that are not group invariant. The positions of the degenerate minima are then related by symmetry group transformations. Classically, the minimal energy solutions correspond to particles at rest in any one of the minim ...
Searches for NP : non-SUSY scenarios
... Above the SM value (2.7 ) if low energy e+e- data are used for aHAD - e+e- 4 at BaBar using ISR photons : somehow in-between e+e- & - (e+e- ) by KLOE at DANE (s 1 GeV) : confirms the other e+e- meas. … ...
... Above the SM value (2.7 ) if low energy e+e- data are used for aHAD - e+e- 4 at BaBar using ISR photons : somehow in-between e+e- & - (e+e- ) by KLOE at DANE (s 1 GeV) : confirms the other e+e- meas. … ...
11 Canonical quantization of classical fields
... it is possible to take as a starting point for such quantum theories the Lagrangian formalism, whose formal aspects are analogous to that of classicla fields, the basic entities in this case are anticommuting generators of abstract Grassmann (or Bieriezin) algebra which have no classical counterpar ...
... it is possible to take as a starting point for such quantum theories the Lagrangian formalism, whose formal aspects are analogous to that of classicla fields, the basic entities in this case are anticommuting generators of abstract Grassmann (or Bieriezin) algebra which have no classical counterpar ...
Dark Matter Experiments
... experiments, a method where one tries to measure recoils from collisions between dark matter particles and atomic nuclei. These collisions are very rare and hard to measure. In the first part of this bachelor thesis we will look at the theory behind direct detection, and we will test some of the ast ...
... experiments, a method where one tries to measure recoils from collisions between dark matter particles and atomic nuclei. These collisions are very rare and hard to measure. In the first part of this bachelor thesis we will look at the theory behind direct detection, and we will test some of the ast ...
talk_pacific - University of Kentucky
... Weak and strong force require quantum description Quest for unified description of all fundamental forces (reductionism) At present this means gauge invariant quantum field theory ...
... Weak and strong force require quantum description Quest for unified description of all fundamental forces (reductionism) At present this means gauge invariant quantum field theory ...
1. QUARK MODEL
... Here the subscripts indicate symmetric, mixed-symmetry, or antisymmetric states under interchange of any two quarks. The 1 is a uds state (Λ1 ), and the octet contains a similar state (Λ8 ). If these have the same spin and parity, they can mix. The mechanism is the same as for the mesons (see above) ...
... Here the subscripts indicate symmetric, mixed-symmetry, or antisymmetric states under interchange of any two quarks. The 1 is a uds state (Λ1 ), and the octet contains a similar state (Λ8 ). If these have the same spin and parity, they can mix. The mechanism is the same as for the mesons (see above) ...
The Quantum Vacuum and the Cosmological Constant Problem
... ρ ∼ 1/a2 (derived from Einstein’s equations for a static dust filled universe). When the constants are properly taken care of, the result is that the radius of the universe is about 31 km – indeed much less than the distance to the moon! Nevertheless, as Enz and Thellung also point out, in Pauli’s e ...
... ρ ∼ 1/a2 (derived from Einstein’s equations for a static dust filled universe). When the constants are properly taken care of, the result is that the radius of the universe is about 31 km – indeed much less than the distance to the moon! Nevertheless, as Enz and Thellung also point out, in Pauli’s e ...
Quantum Field Theory and Composite Fermions in the Fractional
... defines not only a standard resistor but is also suitable to determine the fine structure constant α = µ0 c0 e2 /(2h) with high accuracy. For the discovery of this integral quantum Hall effect von Klitzing was awarded the Nobel price in 1985. The investigation of new techniques such as molecular bea ...
... defines not only a standard resistor but is also suitable to determine the fine structure constant α = µ0 c0 e2 /(2h) with high accuracy. For the discovery of this integral quantum Hall effect von Klitzing was awarded the Nobel price in 1985. The investigation of new techniques such as molecular bea ...
Light shining through walls
... of their interaction strength, but because the mediators have huge masses and can mediate interactions during only very small times. Put it another way, using the uncertainty principle in its momentum vs distance form, neutrinos can interact strongly, but only with particles that are as close as the ...
... of their interaction strength, but because the mediators have huge masses and can mediate interactions during only very small times. Put it another way, using the uncertainty principle in its momentum vs distance form, neutrinos can interact strongly, but only with particles that are as close as the ...
Topological aspects of systems with broken time-reversal symmetry
... What kinds of interesting physics can we expect in systems such as those briefly described above, when time-reversal symmetry is broken? We know from elementary quantum mechanics that the time-reversal operator is anti-unitary, which means that we can always express it as a product of a (basis-depen ...
... What kinds of interesting physics can we expect in systems such as those briefly described above, when time-reversal symmetry is broken? We know from elementary quantum mechanics that the time-reversal operator is anti-unitary, which means that we can always express it as a product of a (basis-depen ...
Lesson 15: Rotations, Reflections, and Symmetry
... Next, rotate the image of the first rotation by ...
... Next, rotate the image of the first rotation by ...
Quantization of Relativistic Free Fields
... cosmological constant of the order of 10−47 GeV4 . This is smaller than the vacuum energy by a factor of roughly 10123 . The authors conclude that, in the absence of cancellations of Bose and Fermi vacuum energies, field theory gives a too large cosmological constant by a factor 10123 . This conclus ...
... cosmological constant of the order of 10−47 GeV4 . This is smaller than the vacuum energy by a factor of roughly 10123 . The authors conclude that, in the absence of cancellations of Bose and Fermi vacuum energies, field theory gives a too large cosmological constant by a factor 10123 . This conclus ...
Phase Transitions - Helmut Katzgraber
... This implies that for the limit N → ∞ the energy difference goes to minus infinity which means that the building of a domain wall is energetically more favourable. More and more domain walls are built and we will not observe a state with all spins up (or down). Thus there is on phase transition in o ...
... This implies that for the limit N → ∞ the energy difference goes to minus infinity which means that the building of a domain wall is energetically more favourable. More and more domain walls are built and we will not observe a state with all spins up (or down). Thus there is on phase transition in o ...
See Dr. Spanier`s Presentation Slides
... Standard Model Fundamentals The SM is a Quantum Field Theory: describes all interactions as exchange of particles 1) Force laws must apply at all places and times gauge invariance (know how to calibrate) 2) Predicted reaction rates should be finite at all energies renormalizable Turns out: Theories ...
... Standard Model Fundamentals The SM is a Quantum Field Theory: describes all interactions as exchange of particles 1) Force laws must apply at all places and times gauge invariance (know how to calibrate) 2) Predicted reaction rates should be finite at all energies renormalizable Turns out: Theories ...
Section D: - Curved Force Line Elements Theory
... The form of the electroweak gauge theory was set up by Glashow in 1961. Weinberg (in 1967) and Salam (in 1968) independently applied the Higgs mechanism to give mass to the gauge bosons and produced a consistent theory. In 1971, t’Hooft proved the theory was renormalizable. Glashow, Salam, and Weinb ...
... The form of the electroweak gauge theory was set up by Glashow in 1961. Weinberg (in 1967) and Salam (in 1968) independently applied the Higgs mechanism to give mass to the gauge bosons and produced a consistent theory. In 1971, t’Hooft proved the theory was renormalizable. Glashow, Salam, and Weinb ...
Quantum Fields on Noncommutative Spacetimes: gy ?
... spacetimes, the Moyal and the Wick–Voros quantum fields. We should point it out here that different proposals have been discussed in the literature (see for instance [12, 13] and references therein), however the construction provided here is constructive and their consistency and properties can be t ...
... spacetimes, the Moyal and the Wick–Voros quantum fields. We should point it out here that different proposals have been discussed in the literature (see for instance [12, 13] and references therein), however the construction provided here is constructive and their consistency and properties can be t ...
Disorder-induced order with ultra-cold atoms
... In order to study disorder effects, it is hugely beneficial and often indispensable to control the disordered quantity. In most solid states systems, however, disorder originates from noisy experimental parameters and is thus very difficult to control. In recent years, ultra-cold atomic gases have b ...
... In order to study disorder effects, it is hugely beneficial and often indispensable to control the disordered quantity. In most solid states systems, however, disorder originates from noisy experimental parameters and is thus very difficult to control. In recent years, ultra-cold atomic gases have b ...
Untitled
... with (Weyl anomaly, unitarity, ghosts), there are also profound obstacles for conformal gravity at the classical level. The Einstein-Hilbert action of general relativity is not conformally invariant and would have to be modified – but experimental constraints exclude the obvious possibilities. Moreo ...
... with (Weyl anomaly, unitarity, ghosts), there are also profound obstacles for conformal gravity at the classical level. The Einstein-Hilbert action of general relativity is not conformally invariant and would have to be modified – but experimental constraints exclude the obvious possibilities. Moreo ...
Fluctuations of the Electromagnetic Vacuum Field or radiation
... Whether zero-point fluctuations of the electromagnetic field are physically real has been the issue of debate among physicists in the 20th century. Although opinion is now overwhelmingly in their favor, the strength of the evidence on which this opinion relies is still occasionally challenged, 1 and ...
... Whether zero-point fluctuations of the electromagnetic field are physically real has been the issue of debate among physicists in the 20th century. Although opinion is now overwhelmingly in their favor, the strength of the evidence on which this opinion relies is still occasionally challenged, 1 and ...