Spin-polarized transport through two quantum dots Interference and Coulomb correlation effects P.
... two different values of the parameter α and two limiting values of the parameter q. For q = 1 (maximum off-diagonal elements of Γσα ) and α ≠ 1 (in our case α = 0.15), the conductance has a dip when the bare dot levels cross the Fermi level of the leads. The dip is a consequence of destructive quant ...
... two different values of the parameter α and two limiting values of the parameter q. For q = 1 (maximum off-diagonal elements of Γσα ) and α ≠ 1 (in our case α = 0.15), the conductance has a dip when the bare dot levels cross the Fermi level of the leads. The dip is a consequence of destructive quant ...
Parallel algorithms for 3D Reconstruction of Asymmetric
... i.e., some quantity or variable that can take only sharply defined values as opposed to a continuously varying quantity. ...
... i.e., some quantity or variable that can take only sharply defined values as opposed to a continuously varying quantity. ...
Complexity of one-dimensional spin chains
... locally checked (e.g., have m qubits instead of n): These states must violate a transition rule after at most O(m2) transitions, so have a (polynomially small) positive energy. • States which have the right structure and n qubits: The transition rules and boundary conditions select only a correct hi ...
... locally checked (e.g., have m qubits instead of n): These states must violate a transition rule after at most O(m2) transitions, so have a (polynomially small) positive energy. • States which have the right structure and n qubits: The transition rules and boundary conditions select only a correct hi ...
The EPR Paradox
... • Each component leaks, even components that don’t have enough energy classically. They don’t “borrow” energy. • The wave packet is altered by dispersion and interference. The shape of the wave packet (in position and momentum space) is not the same as the initial packet; it does not have the same e ...
... • Each component leaks, even components that don’t have enough energy classically. They don’t “borrow” energy. • The wave packet is altered by dispersion and interference. The shape of the wave packet (in position and momentum space) is not the same as the initial packet; it does not have the same e ...
Quantum energy distribution function of hot electrons in
... the master equation can be transformed into a Fokker-Planck type differential equation, the solution of which may be of a maxwellian type with an effective electron temperature. Complications due to transitions between different Landau bands are examined. In section 4 we consider some assumptions fr ...
... the master equation can be transformed into a Fokker-Planck type differential equation, the solution of which may be of a maxwellian type with an effective electron temperature. Complications due to transitions between different Landau bands are examined. In section 4 we consider some assumptions fr ...
Optical Quantum Information Processing
... Traditional Hong-Ou-Mandel: interfere two photons (from same source): ...
... Traditional Hong-Ou-Mandel: interfere two photons (from same source): ...
Derivation of the Pauli exchange principle
... Feynman [6] introduced the term, “probability amplitude”, into quantum mechanics. The square of the magnitude of this complex number gives the probability of obtaining a specified collection of quantum numbers as the result of measurements. In order to identify this amplitude uniquely (aside from an ...
... Feynman [6] introduced the term, “probability amplitude”, into quantum mechanics. The square of the magnitude of this complex number gives the probability of obtaining a specified collection of quantum numbers as the result of measurements. In order to identify this amplitude uniquely (aside from an ...
Common Exam - 2004 Department of Physics University of Utah August 28, 2004
... A particle (mass m) under the influence of gravity (g) is dropped from rest in a long tube filled with a viscous medium. The magnitude of the viscous force on the particle is proportional to the magnitude of the particle’s velocity. The proportionality constant is related to the viscosity of the med ...
... A particle (mass m) under the influence of gravity (g) is dropped from rest in a long tube filled with a viscous medium. The magnitude of the viscous force on the particle is proportional to the magnitude of the particle’s velocity. The proportionality constant is related to the viscosity of the med ...
Quantum Optics Date lecturer Date lecturer
... Lecturer: Ying-Cheng Chen、Ming-Shien Chang and Yu-Ju Lin (陳應誠、張銘顯、林育如) ...
... Lecturer: Ying-Cheng Chen、Ming-Shien Chang and Yu-Ju Lin (陳應誠、張銘顯、林育如) ...
Level Repulsion of Localized Excitons in Disordered Quantum Wells
... Panel b) shows one typical near-field spectrum measured for different excitation intensities coupled into the fiber. The spectral structures are practically unchanged within this intensity range. This rules out biexcitonic effects in the spectral autocorrelation. A QW exciton, subject to in-plane en ...
... Panel b) shows one typical near-field spectrum measured for different excitation intensities coupled into the fiber. The spectral structures are practically unchanged within this intensity range. This rules out biexcitonic effects in the spectral autocorrelation. A QW exciton, subject to in-plane en ...
The Spin Quantum Number
... Electrons only change orbits if specific amounts (quanta) of extra energy from the outside world are involved. Electrons that receive enough extra energy from the outside world can leave the atom they are in. Electrons that return to orbits they used to reside in give up the extra energy they acquir ...
... Electrons only change orbits if specific amounts (quanta) of extra energy from the outside world are involved. Electrons that receive enough extra energy from the outside world can leave the atom they are in. Electrons that return to orbits they used to reside in give up the extra energy they acquir ...
Tunneling spectroscopy of disordered two
... based on standard quantum Hall physics in the presence of e-e interactions without invoking any such mechanism. Moreover, this mechanism demonstrates that these features are nearly universal, independent of the details of the disorder potential. Three energy scales determine the measured spectrum: t ...
... based on standard quantum Hall physics in the presence of e-e interactions without invoking any such mechanism. Moreover, this mechanism demonstrates that these features are nearly universal, independent of the details of the disorder potential. Three energy scales determine the measured spectrum: t ...
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.