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Solid Helium-4: A Supersolid?
Solid Helium-4: A Supersolid?

...  Andreev and Lifshitz - quantum fluctuations may favor finite density of vacancies even at T=0. Vacancies are mobile and can Bose condense.  Chester - Jastrow wavefunctions generally have ODLRO, including ones describing solid order. Speculate due to vacancy condensation.  Leggett - Supersolid ex ...
ERCIM NEWS ntional Unconve
ERCIM NEWS ntional Unconve

... The classical Turing machine was developed as an abstraction of how human “computers”, clerks following predefined and prescriptive rules, calculated various mathematical tables. The abstraction has proved extremely powerful, yet, as an abstraction, it omits certain features. Physics Despite being f ...
Probing the local field of nanoantennas using single particle
Probing the local field of nanoantennas using single particle

Fabrication and characterization of single luminescing quantum dots
Fabrication and characterization of single luminescing quantum dots

... tunable electrical properties make it suitable as transistor material and, indeed, silicon is the dominating platform for microprocessors and integrated circuits. As of today, the solar cell business is largely based on this material, as well. Being an indirect bandgap semiconductor, silicon could n ...
Collisional properties of ultracold potassium
Collisional properties of ultracold potassium

... successfully evaporatively cooled and condensed. 41K may also be useful for sympathetically cooling the fermionic isotope 40K, given their large positive mutual scattering length. The most abundant potassium isotope, 39K, appears to be a particularly problematic candidate for evaporative cooling, ow ...
1 B ⋅ − − = uuua 2 A β
1 B ⋅ − − = uuua 2 A β

Chapter One : The Story of Magnetic Monopoles 0
Chapter One : The Story of Magnetic Monopoles 0

... 1.2 Dirac Monopoles Once, when addressing a group of students, Dirac stressed the point that all physicists should occupy themselves with the beauty of the equations as one of the criteria of their validity. Throughout his magnificent career, Dirac was known for his preoccupation with the abstract p ...
Memory cost of quantum contextuality Linköping University Post Print
Memory cost of quantum contextuality Linköping University Post Print

... According to quantum mechanics (QM), the result of a measurement may depend on which other compatible observables are measured simultaneously [1–3]. This property is called contextuality and is in contrast to classical physics, where the answer to a single question does not depend on which other com ...
Efficient Universal Quantum Circuits
Efficient Universal Quantum Circuits

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9691 KB pdf file

... Introduction Quantum Chromodynamics (QCD) is widely believed to be the underlying physical theory of strong interactions with quarks and gluons as its elementary degrees of freedom. The theory is asymptotically free [1]. The strength of interaction between the quarks and gluons decreases with increa ...
Universal quantum simulation with prethreshold superconducting qubits: Single-excitation subspace method
Universal quantum simulation with prethreshold superconducting qubits: Single-excitation subspace method

... implementations, which benefit from the inherent scalability of modern solid-state electronics, this barrier in qubit number does not reflect any limitation of the underlying device fabrication or infrastructure requirements, but rather that larger problem sizes would also require longer computation ...
iBios – Portal Project Integrative Toolbox Using Grid
iBios – Portal Project Integrative Toolbox Using Grid

... neutral and extremely light particle one unit of U(1) charge ...
Exercises
Exercises

Nonlocality and entanglement in Generalized
Nonlocality and entanglement in Generalized

... All bipartite correlations of both, quantum and classical correlations, can be mapped to measurement statistics from such joint states. Chapter 3 shows unpublished results on entanglement swapping in GPTs. This protocol, which is well known in quantum information theory, allows to nonlocally transfe ...
Antihydrogen Gravitational States Abstract - Institut Laue
Antihydrogen Gravitational States Abstract - Institut Laue

... An important message from the above expression is that the complex shift M gaCP (due to the account of quantum reflection on the Casimir-Polder potential) is the same for all lowlying quasi-stationary gravitational levels. It means that the transition frequencies between the gravitational states are ...
Generation of Magnetic Fields by Fluid Motion
Generation of Magnetic Fields by Fluid Motion

... any pair of sunspots, the vertical magnetic field is positive in one and negative in the other; if positive in the westerly spot, the pair has positive polarity, otherwise negative. In any half-cycle of 11 years, all sunspot pairs in the northern hemisphere have the same polarity, and all in the sou ...
16.9 Electric Fields and Conductors
16.9 Electric Fields and Conductors

... naming the two types of charge. He argued that whenever a certain charge is produced on one body in a process, an equal amount of the opposite type of charge is produced on another body.The positive and negative charges are to be treated algebraically, so that during any process, the net change in t ...
Curtis-Lue-COCIS-2015-Depletion-forces-due-to-image
Curtis-Lue-COCIS-2015-Depletion-forces-due-to-image

Dynamics and Excited States of Quantum Many
Dynamics and Excited States of Quantum Many

Electron-electron interactions and plasmon dispersion in graphene Please share
Electron-electron interactions and plasmon dispersion in graphene Please share

... general approach. Rather than attempting to make predictions based on a specific microscopic model, one can ask if a relation between the plasmon dispersion and some other fundamental characteristics of the system can be established. Below we point out that such a relation arises naturally from the ...
fluorescence of doubly excited states of helium in homogeneous
fluorescence of doubly excited states of helium in homogeneous

... The helium atom represents the simplest nontrivial quantum mechanical system that is easy to manipulate experimentally. As such it has been a subject of many practical and theoretical studies since the early days of quantum physics [1]. The availability of tunable synchrotron radiation sources was e ...
Theory Construction and Experimentation in High Energy Particle
Theory Construction and Experimentation in High Energy Particle

... contribute to theorizing in different ways at various stages of scientific research. It is worth pointing out that what I take to be correct about scientific experimentation should not be construed as asserting that there is room for scientific experimentation which is totally free of theory, or mor ...
Non-Equilibrium Liouville and Wigner Equations: Moment Methods
Non-Equilibrium Liouville and Wigner Equations: Moment Methods

... In such a framework, the non-equilibrium evolution of the system does not thermalize, but we shall apply suitable long-time approximations and investigate whether they yield an approximate thermalization or if the latter is physically unexpected. Even if such dissipationless systems constitute an ov ...
Electromagnetic Shells of Atoms and the Periodic System of Elements
Electromagnetic Shells of Atoms and the Periodic System of Elements

... experiments, determined by charged state of the particles and charged namely by magnetic charges different signs. However, interpretation of the experimental results which was built by Ehrenhaft on analogy with behavior of electric particles in the electrostatic field, does not appear convincing eno ...
PH213 Chapter 27 Solutions
PH213 Chapter 27 Solutions

... Notice that this expression is valid for both positive and negative charges as well as for points located on the positive and negative z axis. If the charge is positive, the electric field should point outward. For points on the positive z axis, the field points in the positive z direction, which is ...
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History of quantum field theory

In particle physics, the history of quantum field theory starts with its creation by Paul Dirac, when he attempted to quantize the electromagnetic field in the late 1920s. Major advances in the theory were made in the 1950s, and led to the introduction of quantum electrodynamics (QED). QED was so successful and ""natural"" that efforts were made to use the same basic concepts for the other forces of nature. These efforts were successful in the application of gauge theory to the strong nuclear force and weak nuclear force, producing the modern standard model of particle physics. Efforts to describe gravity using the same techniques have, to date, failed. The study of quantum field theory is alive and flourishing, as are applications of this method to many physical problems. It remains one of the most vital areas of theoretical physics today, providing a common language to many branches of physics.
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