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PHYSICAL REVIEW LETTERS Tejada et al. Reply: Our suggestion
PHYSICAL REVIEW LETTERS Tejada et al. Reply: Our suggestion

... ferritin particles. Besides that uncertainty, the dependence of the energy barrier on the magnetic field should be more complicated than for a ferromagnetic particle due to the fact that the noncompensated moment of a ferritin particle arises from the contribution of two sublattices. For the very sa ...
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... cat (pardon the expression) mixed or smeared out in equal parts. It is typical of these cases that an indeterminacy originally restricted to the atomic domain becomes transformed into macroscopic indeterminacy, which can then be resolved by direct observation. That prevents us from so naively accept ...
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Algorithmic complexity of quantum states

Fermi and the Theory of Weak Interactions
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... operators whose main property is that they can either create or annihilate particles. In this case, A can create or annihilate a photon, thus explaining the emission or absorption of a photon. Further the current JE also is composed of ¯eld operators, but ¯eld operators of the charged particles like ...
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... If one of the slits in a double slit experiment is closed, one sees only a diffraction pattern from a single slit (P1). If the other slit is opened and the first one closed, one sees only the diffraction pattern from the other slit (P2). If both are opened, one does not simply see the sum of P1 and ...
Progress Report 1: Search for Low Mass Strings at the LHC with CMS
Progress Report 1: Search for Low Mass Strings at the LHC with CMS

... complete as there are numerous observed physical phenomena which is it unable to explain. As many theoretical papers have hypothesized, there are plenty of reasons to believe in the existence of new physics beyond that of the current SM. One such alternate model is superstring theory. Superstring th ...
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Optical Spectroscopy Lecture 1 Basic Concepts I. Classical Electron

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... 110A; 110B concurrently; open to advanced undergraduates with GPA of 3.70. An introduction to the basic physics of astronomy and astrophysics at the graduate level. Principles of energy transfer by radiation. Elements of classical and quantum theory of photon emission; bremsstrahlung, cyclotron and ...
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Nucleus-mediated spin-flip transitions in GaAs quantum dots

... where Si (Ik ) and ri (Rk ) denote the spin and position the ith electron (kth nuclei兲. This coupling flips the electron spin and simultaneously lowers/raises the z component of a nuclear spin, which mixes spin states and provides the possibility for relaxation. But the hyperfine interaction alone d ...
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Theoretical and empirical reasons for considering the application of

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PPT

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Algorithms and Architectures for Quantum Computers
Algorithms and Architectures for Quantum Computers

... This research group seeks to understand and develop the experimental and theoretical potential for information processing and communications using the laws of quantum physics. Two fundamental questions motivate our work: (1) How can a large-scale, reliable quantum computer be realized? (2) What new ...
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< 1 ... 371 372 373 374 375 376 377 378 379 ... 562 >

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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