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Wormholes in Spacetime and the Constants of Nature
Wormholes in Spacetime and the Constants of Nature

... In sect. 3, Coleman's explanation for the vanishing of the cosmological constant is reviewed. The superposition of a-dependent effective theories is shown to be described by a probability distribution that is very sharply peaked at A = 0. This argument requires some additional assumptions beyond tho ...
Processing quantum information in diamond
Processing quantum information in diamond

Strain Gauges - Personal Web Pages
Strain Gauges - Personal Web Pages

The Structure of the Proton more than eighty years. It also has been
The Structure of the Proton more than eighty years. It also has been

... similar to the quantum electrodynamics(QED) whic his a local gauge theory based on the U(1) symmetry. Since these partons carry the quark quantum numbers and have simple interaction with the electroweak currents, they are referred to as the “current quarks” in contrast to the “constituent quarks” of ...
Slides - IICQI
Slides - IICQI

... Ion trap and neutral atom trap Schemes based on solid state physics Quantum dot qubits Superconducting qubits ...
Parity Violation in Chiral Molecules
Parity Violation in Chiral Molecules

... have to be determined experimentally (such as the charge and the mass of the electron in the SMPP). The main achievement of the SMPP was the unification of the weak and the electromagnetic forces and to some extent the strong force in a quantum gaugefield theoretical language. Table 1 summarizes our ...
Physics
Physics

Of Quarks and Gluons
Of Quarks and Gluons

Jackson 2.9 Homework Solution
Jackson 2.9 Homework Solution

... σ=3 ϵ0 E 0 cos θ If the sphere is now cut into hemispheres at the polar angle θ = π/2, the bottom hemisphere will feel a total force: F=∫ σ( x) E(x) d a We have to be careful and not include the force of the bottom hemisphere on itself. We do this by using the relation E= 2σϵ which gives us just the ...
Particle-vortex duality of two-dimensional Dirac fermion from electric
Particle-vortex duality of two-dimensional Dirac fermion from electric

Physics
Physics

... Phy 340. Optics. Theoretical and experimental study of the properties of light: wave motion, propagation of light in media, geometrical optics, polarization, interference, diffraction, Fourier optics and coherence theory. Prerequisite:185. Phy 341. Advanced Physics Laboratory. Experiments in upper- ...
Parton model from bi-local solitonic picture of the baryon in two-dimensions
Parton model from bi-local solitonic picture of the baryon in two-dimensions

... mesons, an idea that may be traced back to the Skyrme model [1]. In previous work by one of us, it was shown that in two dimensions, there is an exact description of QCD as a bi-local theory of mesons [2]. This description, called 2-dimensional hadron dynamics, is ...
Evolution as context-driven actualisation of potential: toward
Evolution as context-driven actualisation of potential: toward

Quantitative Determination of Singlet Oxygen Generated by Excited
Quantitative Determination of Singlet Oxygen Generated by Excited

... were irradiated under similar conditions to emit spectra consistent with singlet oxygen luminescence. Argon-purged solutions of each compound showed no near-IR luminescence. The quantum yields of oxygen (Φ∆) were determined using methylene blue in D2O (Φ∆ ) 0.52) or MeCN (Φ∆ ) 0.52) as a reference.5 ...
on the influence of sample preparation on the re
on the influence of sample preparation on the re

Performance of Many–Body Perturbation Theory
Performance of Many–Body Perturbation Theory

The Need for Structure in Quantum Speedups
The Need for Structure in Quantum Speedups

Coherent and incoherent evolution of qubits in
Coherent and incoherent evolution of qubits in

... Petta et al.Phys. Rev. Lett. 93 186802 – Co-tunnelling (in Can be ...
Spin Flips and Quantum Information for Antiparallel Spins
Spin Flips and Quantum Information for Antiparallel Spins

... Let us try to understand why. That there could be any difference between communicating a direction by two parallel spins or two antiparallel spins seems, at first sight, extremely surprising. After all, by simply flipping one of the spins we could change one case into the other. For example, if Bob ...
What Is Field Theory?1
What Is Field Theory?1

... consider whether a theory as grand and as deliberately indifferent to intentionality as that of Marx and Engels is correct; the word “theory” then becomes available for more modest—and more promising—investigations. But if every case of successful data analysis becomes a theory, and only successful ...
Effects of photonic structures on upconversion
Effects of photonic structures on upconversion

Viscosity of a nucleonic fluid
Viscosity of a nucleonic fluid

paramagnetic resonance of divalent europium in lead chloride
paramagnetic resonance of divalent europium in lead chloride

... (6:) parameter. The ratio of two crystal field strengths of the same degree can often be calculated more reliably than the magnitude of each of theme). The presence of two parameters then permits one to check whether the splittings are linear in the crystal field strengths or not. (See appendix B.) ...
Skin effects in metals in a perpendicular magnetic field
Skin effects in metals in a perpendicular magnetic field

Topological Chern Indices in Molecular Spectra
Topological Chern Indices in Molecular Spectra

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History of quantum field theory

In particle physics, the history of quantum field theory starts with its creation by Paul Dirac, when he attempted to quantize the electromagnetic field in the late 1920s. Major advances in the theory were made in the 1950s, and led to the introduction of quantum electrodynamics (QED). QED was so successful and ""natural"" that efforts were made to use the same basic concepts for the other forces of nature. These efforts were successful in the application of gauge theory to the strong nuclear force and weak nuclear force, producing the modern standard model of particle physics. Efforts to describe gravity using the same techniques have, to date, failed. The study of quantum field theory is alive and flourishing, as are applications of this method to many physical problems. It remains one of the most vital areas of theoretical physics today, providing a common language to many branches of physics.
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