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Quantum Theory
Quantum Theory

... In order to know where an electron is we have to “see” it. To see something it must be hit by a photon. Photons and electrons are roughly the same size, when they collide the electron will no longer be in the same position. ...
The Cutkosky rule of three dimensional noncommutative field
The Cutkosky rule of three dimensional noncommutative field

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Comparison of 3D classical and quantum mechanical He scattering
Comparison of 3D classical and quantum mechanical He scattering

... mechanical [4]. What does it mean in the picture of quantum mechanics? Since the interaction is generally strong, EhrenfestÕs theorem invalidates the picture of the trajectories. If we adhere the purely stochastic (``Heidelberg approach'') discussion of quantum chaos; the dwell time of atoms near th ...
PRIGOGINE Y LA TEORÍA DEL CAOS: UNA MIRADA FILOSÓFICA.
PRIGOGINE Y LA TEORÍA DEL CAOS: UNA MIRADA FILOSÓFICA.

... as if the system were in a state represented by a diagonal density operator (. It can be proved that decoherence also obtains when the spectrum of the Hamiltonian has a single discrete value non-overlapping with the continuous part; but if the Hamiltonian’s spectrum has more than one non-overlapp ...
Entanglement and Bell theorem
Entanglement and Bell theorem

Extrimes of Information Combining
Extrimes of Information Combining

...  Quantum Enumerators  Fidelity of Quantum ARQ Protocol • Quantum Codes of Finite Lengths • The asymptotical Case (the code length ...
The Ideal Gas on the Canonical Ensemble
The Ideal Gas on the Canonical Ensemble

... both molecules are in the same state, the second term corresponds to the molecules being in different states. We can now see the problem. When the particles are in different state, we have counted each state twice. The state with one molecule in state 1, the other in state 2, could be written as s = ...
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Phy224C-IntroRHI-Lec6-CrossSections

... Lorentz invariant: it is the same in CM or Lab. ...
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Open-System Quantum Simulation with Atoms and Ions

... a many-particle system. For the master equation, necessary conditions to achieve such dissipative dynamics which contracts to a pure state is given by the conditions H |ψi = E |ψi, and ∀α cα |ψi = 0. As the last condition illustrates, |ψi is a state decoupled from the environment, which in quantum o ...
Unit III- Introduction - Varga
Unit III- Introduction - Varga

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“Shut The Front Door!”: Obviating the Challenge of Large

... multiverse [8] where the energy of inflation is internalized locally as a form of gravitational free-fall giving the Euclidean observer his façade of virtual reality (Figs. 2 & 3). If this sounds like a horrendous concatenation violating Occam’s razor, be reminded that if one is inclined to accept t ...
The Strong interaction or the mystery of the nucleus - Pierre
The Strong interaction or the mystery of the nucleus - Pierre

The Rydberg series for the doubly excited states of the helium atom
The Rydberg series for the doubly excited states of the helium atom

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Slides - GSI IndiCo

One Hundred Years of Quantum Physics
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Introduction To Quantum Computing

... Threshold Theorem Our entire discussion so far has been on “perfect” quantum gates, but of course they are not perfect. Various “threshold theorems” have suggested that we need 10^4 to 10^6 gates in less than the decoherence time in order to apply quantum error correction (QEC). QEC is a big enough ...
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Scalar Field Theories with Screening Mechanisms

The classical electromagnetism as used nowadays is not the theory
The classical electromagnetism as used nowadays is not the theory

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Logic, Geometry And Probability Theory - Philsci

Symmetry and Asymmetry in the Mendeleïev`s Periodic Table
Symmetry and Asymmetry in the Mendeleïev`s Periodic Table

... Niels Bohr established the relation between the position of each Element in the periodic table and its electronic structure. The chemical properties of each Element are thus COMPLETELY DETERMINED by the distribution of the electrons of this Element. The properties and positioning of these electrons, ...
Theory of Open Quantum Systems - ITP Lecture Archive
Theory of Open Quantum Systems - ITP Lecture Archive

Quantum Chemistry Postulates Chapter 14 ∫
Quantum Chemistry Postulates Chapter 14 ∫

... For a physical system consisting of a particle(s) there are associated mathematical functions known as wave functions. A wave function carries ‘information’ about everything that can be known (observable/measurable) about the system. Every observable property is associated with an operator. Operatin ...
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Canonical quantization

In physics, canonical quantization is a procedure for quantizing a classical theory, while attempting to preserve the formal structure, such as symmetries, of the classical theory, to the greatest extent possible.Historically, this was not quite Werner Heisenberg's route to obtaining quantum mechanics, but Paul Dirac introduced it in his 1926 doctoral thesis, the ""method of classical analogy"" for quantization, and detailed it in his classic text. The word canonical arises from the Hamiltonian approach to classical mechanics, in which a system's dynamics is generated via canonical Poisson brackets, a structure which is only partially preserved in canonical quantization.This method was further used in the context of quantum field theory by Paul Dirac, in his construction of quantum electrodynamics. In the field theory context, it is also called second quantization, in contrast to the semi-classical first quantization for single particles.
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