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How to Construct Quantum Random Functions
How to Construct Quantum Random Functions

... In the quantum setting, any quantum algorithm A making even a single quantum query to Oi gets to “see” all the outputs at once, meaning we need exponentially many samples to simulate Oi exactly. However, while we cannot lazily simulate the oracles Oi given q samples from Di , we can approximately si ...
The strange (hi)story of particles and waves*
The strange (hi)story of particles and waves*

The 1925 Born and Jordan paper “On quantum mechanics”
The 1925 Born and Jordan paper “On quantum mechanics”

... applied only to simple examples without being fully carried through to a generalized theory. Having been in an advantageous position to familiarize ourselves with his ideas throughout their formative stages, we now strive 共since his investigations have been concluded兲 to clarify the mathematically f ...
A New Constraint on Strongly Coupled Field Theories
A New Constraint on Strongly Coupled Field Theories

Single defect centres in diamond: A review
Single defect centres in diamond: A review

... lies in the long coherence times and meanwhile well established control of quantum states. Main progresses have been achieved with quantum dots as individual quantum systems. Initially the electronic ground as well as excited states (exciton ground state) have been used as definition of qubits [12]. ...
Book of Abstracts
Book of Abstracts

... A Bose-Fermi mixture of Cs-133 and Li-6 atoms is an ideal system for the investigation of the heteronuclear Efimov scenario, since its large mass imbalance results in a drastically reduced scaling factor between consecutive three-body states. Additionally, the existence of two independent interactio ...
View PDF - CiteSeerX
View PDF - CiteSeerX

... physical intuition or physical sense. A more exact definition of the latter notions would imply serious study that is beyond the scope of the present paper.8 Current progress in computer techniques makes it even more acute that there is always a complementary relation between calculations and explan ...
The Effect of Communication Costs in Solid
The Effect of Communication Costs in Solid

Electron-electron interactions in graphene field- Linköping University Post Print
Electron-electron interactions in graphene field- Linköping University Post Print

... [25–27]. Even though certain aspects of electron-electron interactions have been considered previously [28,29], the effect of magnetic-field-induced modification of the confining potential on the eigenspectrum of graphene quantum dots has not been studied before, and the present paper represents a s ...
Quantum interference in the field ionization of Rydberg atoms
Quantum interference in the field ionization of Rydberg atoms

... time step of about 10−11 s. Since our ramp takes our initial state to ionization in ∼ 1 µs we need about 105 time steps. The calculation is greatly aided by the use of a supercomputer. While the time evolution must proceed serially, all of the necessary time evolution operators are calculated in par ...
Classical Field Theory - Imperial College London
Classical Field Theory - Imperial College London

... single type of particle, a photon, an electron and which we represent with a single field, actually comes in several variants, known as degrees of freedom. There is one degree of freedom for every distinct way that a particle can transport energy and momentum along any one given direction in space. I ...
Chapter 3: semiconductor science and light emitting diodes
Chapter 3: semiconductor science and light emitting diodes

... ‰ Two atoms brought together to form molecule ¾“splitting” of energy levels for outer electron shells ...
Quantum Channel Capacities (PDF Available)
Quantum Channel Capacities (PDF Available)

Theory of Superconductivity
Theory of Superconductivity

... • In 1979, Frank Steglich et al. observed superconductivity below Tc ≈ 0.5 K in CeCu2 Si2 . This material is not a normal metal in its normal state. Instead is is a heavy-fermion metal. The electrons at the Fermi energy have strong Ce f -orbital character. The very strong Coulomb repulsion between ...
$doc.title

... The resonance lines are found by calculating the transmission through the quantum dot as function of X` and Xr . One then finds [30] that when either X` or Xr is varied while the other parameter is kept fixed, the maxima of the transmission occur on two ‘resonance lines’, shown in thick lines in Fig ...
chapter 2 photons and atoms
chapter 2 photons and atoms

Dynamics of Quantum Many Body Systems Far From Thermal
Dynamics of Quantum Many Body Systems Far From Thermal

Determination of Argon metastable density from relative emission
Determination of Argon metastable density from relative emission

... on the resolution of measurement and the extent of supporting data that exists on the fundamental optical properties of the species of interest. On the most basic level, a simple knowledge of the spectral location of strong transition lines can yield information on the identity of plasma species and ...
Forward and backward time observables for quantum evolution and
Forward and backward time observables for quantum evolution and

12 - KVI
12 - KVI

Dynamics and interference of autoionizing wave packets
Dynamics and interference of autoionizing wave packets

Achieving quantum supremacy with sparse and noisy commuting
Achieving quantum supremacy with sparse and noisy commuting

... 1.2 Related work and perspective Circuit depth and optimal sparse IQP sampling. Below we improve on the results of [11] to extend the hardness results of IQP sampling introduced in [11] to sparsely connected circuits. The motivation for this is both theoretical and practical. We want to both improve ...
G69 - Chemie Unibas
G69 - Chemie Unibas

... a thin metal sheet affords one of the simplest methods of testing the general correctness of this theory of single scattering. This has been done recently for a rays by Dr. Geiger*, who found that the distribution for particles deflected between 30 ~ and 150 ~ from a thin gold-foil was in substantia ...
Quantum Private Information Retrieval - UvA/FNWI
Quantum Private Information Retrieval - UvA/FNWI

... LDCs. But we will also see codes where Σ = {0, 1}a for some positive integer a, in which case the “answers” to the queries consist not only of one bit, but of blocks of a bits. It depends on the setting which of the parameters are more important than others. For example in data storage and transmiss ...
Coarse graining and renormalization: the bottom up approach
Coarse graining and renormalization: the bottom up approach

... Spin foams and space time atoms. Coarse graining without a scale. The importance of refining states. Tensor network coarse graining algorithms. Application to spin foams / spin nets. Classifying (symmetry protected) phases. New representations and vacua in loop quantum gravity Expanding the theory a ...
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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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