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Lecture 14 1 Entanglement and Spin
Lecture 14 1 Entanglement and Spin

... So what is Ĥ? We must figure out how these electrons interact with each other. What effect could one electron have on the other electron, and vice versa? Well, we know that an electron has a magnetic dipole moment that is related to its spin. Magnetic dipole moments come up classically when you hav ...
Two-Electron Energy Spectrum in Concentric Quantum Ribbons
Two-Electron Energy Spectrum in Concentric Quantum Ribbons

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... degenerate: Ep = E−p . By labeling a state according to its momentum quantum number, we have a unique basis in which to expand any one-dimensional wave function. Thus, we have expressed the wave function as a function of x, t, and labelled it by its (continuous) momentum quantum number p. We did not ...
The two-state vector description of a quantum system
The two-state vector description of a quantum system

Controlled Hawking Process by Quantum Information
Controlled Hawking Process by Quantum Information

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... • There exist pairing correlations in odd-odd nuclei made up of deuterons. Correlations between two spin one deuterons lead to spin zero alpha particles and so forth all within the pairing condensate. • The condensate resides near the surface of evaporating high baryon number A ≫ 1 nuclei. For examp ...
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... Light emitted by fluorescent materials always has lower energy than the light striking the fluorescent substance. Absorption of visible light could not give rise to emitted ultraviolet light because the latter has higher energy. The reverse process, ultraviolet light producing visible light by fluor ...
As we know, the measurement of a static (specific
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The Indivisible Now: why time must be discrete. - Philsci
The Indivisible Now: why time must be discrete. - Philsci

... To argue for this in a little more detail, firstly consider the essence of time as a sequence of information from the future into the past. The nature of time as a timing mechanism13 is a more mechanical, arbitrary property, and not what I am considering here. Strictly speaking any entangled system ...
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Chapter 6: Electronic Structure of Atoms

... equation to incorporate both the wave and particle properties of the electron. The solution to the Schrödinger equation yields a series of wave functions( ). The square of a wave function ( 2) is the probability density, or the probability that an electron will be found at a given point in space (al ...
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... In this chapter we continue with a primary goal of physics―discovering and understanding the properties of atoms. 100 years ago researchers struggled to find experiments that would prove the existence of atoms. Today, thanks to scientific and technological progress, we can manipulate atoms in amazin ...
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... Bohr’s model thus predicts a discrete energy level diagram for a one-electron atom, which means that the electron is allowed to stay only in one of the quantized energy levels described in Equation (10.12), which is schematically shown in Figure 10.4. The ground state for the system of nucleus plus ...
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... based on NMR (Oxford; IBM, MIT, Stanford) 2000: quantum computer on 7 qubits, based on NMR ...
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Lecture 13 (Slides) September 26

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Zero Point Energy

... In classical physics, the energy of a system is relative, and is defined only in relation to some given state (often called reference state). Typically, one might associate a motionless system with zero energy, although doing so is purely arbitrary. In quantum physics, it is natural to associate the ...
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two electron energy sprectrum in concentrical quantum ribbons
two electron energy sprectrum in concentrical quantum ribbons

... the analysis of the low-lying energy states, we have used the same notation reported in reference [6]. We can observe that the results display the asymptotic behavior when α tends to one and simultaneously  tends to zero. Additionally, one can see that the two electron energy spectrum is strongly d ...
Derivation of the Equation E=mc2-v3.odt
Derivation of the Equation E=mc2-v3.odt

... Later we shall transform these preliminary approximations into exact equations. Before I begin to derive the formula of equivalence of mass and energy, let me outline the general strategy I shall follow. Because we apply these two uncertainty principles to the same particle, the uncertainty in the p ...
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Einstein`s Postulate of Relaavity
Einstein`s Postulate of Relaavity

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Particle in a box



In quantum mechanics, the particle in a box model (also known as the infinite potential well or the infinite square well) describes a particle free to move in a small space surrounded by impenetrable barriers. The model is mainly used as a hypothetical example to illustrate the differences between classical and quantum systems. In classical systems, for example a ball trapped inside a large box, the particle can move at any speed within the box and it is no more likely to be found at one position than another. However, when the well becomes very narrow (on the scale of a few nanometers), quantum effects become important. The particle may only occupy certain positive energy levels. Likewise, it can never have zero energy, meaning that the particle can never ""sit still"". Additionally, it is more likely to be found at certain positions than at others, depending on its energy level. The particle may never be detected at certain positions, known as spatial nodes.The particle in a box model provides one of the very few problems in quantum mechanics which can be solved analytically, without approximations. This means that the observable properties of the particle (such as its energy and position) are related to the mass of the particle and the width of the well by simple mathematical expressions. Due to its simplicity, the model allows insight into quantum effects without the need for complicated mathematics. It is one of the first quantum mechanics problems taught in undergraduate physics courses, and it is commonly used as an approximation for more complicated quantum systems.
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