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On the role of the electron-electron interaction in two-dimensional
On the role of the electron-electron interaction in two-dimensional

... e.g. [11–13], in agreement with what Tarucha et al. had seen in their experiment [6]. Therefore the two-dimensional harmonic oscillator has become the standard choice for the confining potential. Still, this is indeed an approximation and some efforts have been made to use a more realistic descripti ...
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spdfgh

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QUANTUM CRYPTOGRAPHY: PITFALLS AND ASSETS
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... B. Public-key (Asymmetric) cryptography Asymmetric key cryptography uses two different but mathematically relayed keys for encryption and decryption process, one to encrypt ...
Quantum strategies
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... the game is described instead by a density matrix. We must show that there is always a quantum strategy which reproduces the pi as the diagonal elements in the density matrix. Assume by induction that this is true up to a move of the classical player. His action has the same effect on the diagonal e ...
University of Maryland, Baltimore County
University of Maryland, Baltimore County

... claimed 10% DE, the portion of total counts caused by after-pulsing is 600% of that of the light count. 2. A test of after-pulsing duration can be done by increasing the gating pulse repetition rate (reducing time duration between gating pulse) and observe the increase of DCR. 3. As long as a few mi ...
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... IR field barrier at the release time t0 [17]. The subsequent electron dynamics are the same as in the standard model; the acceleration is imparted by the IR field, and only trajectories that return to the ion core give rise to harmonic generation. The new feature of the APT  IR trajectory calculati ...
1. Structure of Matter
1. Structure of Matter

PHYS_483_ProjectFINA..
PHYS_483_ProjectFINA..

... [14]. Quantum dots of about 2 to 10 nm in diameter can be created using colloidal synthesis, which is currently considered an inexpensive and relatively safe method for creating quantum dots [18]. The power behind the quantum dot solar cell technology, however, lies on the product's market competenc ...
Aalborg Universitet Zero Point Energy and the Dirac Equation Forouzbakhsh, Farshid
Aalborg Universitet Zero Point Energy and the Dirac Equation Forouzbakhsh, Farshid

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Temperature- and Field-dependent electron and hole mobilities in

Introduction to quantum and solid state physics for
Introduction to quantum and solid state physics for

... The wave equation is linear (no ψ 2 (x, t) or any of its derivatives) and therefore if ψ1 and ψ2 are solutions to the equation, then ψ = A1 ψ1 + A2 ψ2 is also a solution, with A1 , A2 arbitrary constants. This is the same principle of superposition which appears in Maxwell’s equations (which are als ...
The Classical Lamb Shift: Why Jackson is Wrong!
The Classical Lamb Shift: Why Jackson is Wrong!

Quantum algorithms - People @ EECS at UC Berkeley
Quantum algorithms - People @ EECS at UC Berkeley

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... the proton meant that there was some underlying symmetry which was only broken by the charge on the proton vs the lack of charge on the neutron. He called this isospin symmetry, because it behaves like an angular momentum, and thought of the nucleon as an isospin-1/2 system, with the proton being th ...
Electron–electron interactions in the chemical bond: “1/3” Effect in
Electron–electron interactions in the chemical bond: “1/3” Effect in

... excitation or fractional charges, e* = ± e/3, and their recent experimental verification9 . Until this time, the quantization of charge in integral units of the electron charge, e, has been one of the basic features in the extra-nuclear, non-quarkian world. Since the FQHE has been shown to be exact ...
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An effective quantum defect theory for the diamagnetic spectrum of a
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mjk_icopsO1.pps - Mark J. Kushner
mjk_icopsO1.pps - Mark J. Kushner

... not directly electric field, peaks dominantly near the trigger electrode.  As avalanche times are < 1 ns at electric fields of interest (100s Td), e-impact sources dominate.  Photoionization does penetrate “further, sooner”.  75 Torr, Ar/Hg = 75/0.001 (slightly warm), 0 - 30 ns. ...
A foundational approach to the meaning of time reversal
A foundational approach to the meaning of time reversal

June 2008
June 2008

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Quantum electrodynamics



In particle physics, quantum electrodynamics (QED) is the relativistic quantum field theory of electrodynamics. In essence, it describes how light and matter interact and is the first theory where full agreement between quantum mechanics and special relativity is achieved. QED mathematically describes all phenomena involving electrically charged particles interacting by means of exchange of photons and represents the quantum counterpart of classical electromagnetism giving a complete account of matter and light interaction.In technical terms, QED can be described as a perturbation theory of the electromagnetic quantum vacuum. Richard Feynman called it ""the jewel of physics"" for its extremely accurate predictions of quantities like the anomalous magnetic moment of the electron and the Lamb shift of the energy levels of hydrogen.
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