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practical conversion of zero-point energy
practical conversion of zero-point energy

Quantum coherent biomolecular energy transfer with spatially
Quantum coherent biomolecular energy transfer with spatially

Genuine Fortuitousness
Genuine Fortuitousness

... In the late 1920’s, due to the experimental success of quantum theory, many physicists who were now used to the accuracy of what was a phenomenologically descriptive theory of the quantum scale began to question how QM fit in with the rest of physics as whole. In short, physicists asked the question ...
Towards a Philosophical Reconstruction of the Dialogue
Towards a Philosophical Reconstruction of the Dialogue

... physics is to provide a description of the basic structures and processses at work in the physical world in terms of theories and mathematical models that can be used to generate empirically testable predictions. Since at least the late eighteenth century, much progress has been made by physicists i ...
Large-N Limit as a Classical Limit: Baryon Two-dimensional QCD and Multi-Matrix Models
Large-N Limit as a Classical Limit: Baryon Two-dimensional QCD and Multi-Matrix Models

... Spectacular experimental discoveries, such as patterns found in the hadronic spectrum [40, 83], electroweak gauge bosons [89], and scaling in deep inelastic scattering [38], parallel the discovery of the detailed orbits of planets and moons, or of discrete atomic spectra. On the other hand, equally ...
The Laboratory of the Mind: Thought Experiments in the Natural
The Laboratory of the Mind: Thought Experiments in the Natural

- Quantum Optics Group
- Quantum Optics Group

... later reported by Jánossy [35]. The q -plate was first conceived as a ‘simplified’ (flattened) liquid crystal droplet. In a more general definition, a q -plate is a slab of a birefringent material, e.g., a liquid crystal, having a uniform birefringent phase retardation δ and a transverse optical ax ...
Quantum simulations with cold trapped ions
Quantum simulations with cold trapped ions

PHYSICS 673 Nonlinear and Quantum Optics
PHYSICS 673 Nonlinear and Quantum Optics

Fast converging path integrals for time-dependent potentials
Fast converging path integrals for time-dependent potentials

... world-line Monte Carlo [40]–[42], where discretization errors are completely removed [43], or open systems where the main contribution to the systematic error is due to retardation effects which cannot be dressed into the form of simple potentials [44]. In this and the subsequent paper [1], we extend ...
Broad Feshbach Resonance in the 6Li-40K Mixture
Broad Feshbach Resonance in the 6Li-40K Mixture

... well as a whole new class of quantum many-body systems [1–3]. Feshbach resonances [4] played a central role in this development, as they offer exceptional control over the interatomic interactions at low temperatures [5]. In gases with the appropriate spin mixture, the sign and magnitude of the s-wa ...
The electron theory of magnetism: Electronic
The electron theory of magnetism: Electronic

Coupling a single electron to a Bose
Coupling a single electron to a Bose

The AdS 3/CFT2 correspondence in black hole physics
The AdS 3/CFT2 correspondence in black hole physics

... is used to rederive the boundary currents in a more controlled way. In particular, the dual theory is shown to contain an affine algebra of the currents derived and an associated Virasoro algebra with a central charge equal to the Brown-Henneaux one [19]. Finally, taking advantage of the observation ...
Quantum Gates and Simon`s Algorithm
Quantum Gates and Simon`s Algorithm

... Any function f : {0, 1}n → {0, 1}m , where n is the number of input bits and m the number of output bits is said to be a Boolean function. Any Boolean function can be represented by a truth table. If f = (f1 , . . . , fm ), this is a matrix of size 2n × m where in column i we have the list of values ...
Experimental Primer on the Trapped Ion Quantum
Experimental Primer on the Trapped Ion Quantum

... Ions can be confined for days in an ultra-high-vacuum environment with minimal perturbations to their internal atomic structure, and collisions with background gas can be neglected. Even though the ions interact strongly through their mutual Coulomb interaction, the fact that the ions are localized ...
The Violation of Bell Inequalities in the Macroworld
The Violation of Bell Inequalities in the Macroworld

Introduction to Quantum Information
Introduction to Quantum Information

... Shannon’s source coding theorem: the compression rate of H(X ) bits per symbol produced by a source of i.i.d. random variables is optimal. The Shannon entropy H(X ) is a measure of the minimal physical resources, in terms of the average number of bits per symbol, that are necessary and sufficient to ...
1 Path Integrals and Their Application to Dissipative Quantum Systems
1 Path Integrals and Their Application to Dissipative Quantum Systems

... quantum computing. On the other hand, in many solid state systems, the environmental coupling can be so strong that weak coupling theories are no longer valid. This is the regime where the path integral approach has proven to be very useful. It would be beyond the scope of this chapter even to attem ...
12 - KVI
12 - KVI

Macroscopic superposition states and decoherence by quantum
Macroscopic superposition states and decoherence by quantum

... of quantum states. This phenomenon, commonly referred to as decoherence or dephasing, is the subject of the second part of the thesis with the title “Decoherence by quantum telegraph noise”. We have studied the time evolution of the reduced density matrix of a two-level system (qubit) subject to qua ...
Universal diffraction of atoms and molecules from a quantum
Universal diffraction of atoms and molecules from a quantum

... that universal behavior was also found for the –3rd-order diffraction efficiency curves of He, He2, and D2. In conclusion, we have observed emerging beam resonances for He, He2, and D2 quantum-reflected from an echelette diffraction grating at grazing incidence. Our observation indicates that He2, d ...
The Rutherford Memorial Lecture 1958 Reminiscences
The Rutherford Memorial Lecture 1958 Reminiscences

... a-particles escaping from thin-walled emanation tubes. Also for the more complex case of heavier substances, approximate agreement was ascertained with the expected atomic numbers and the estimated values for the binding energies of the electrons, but the theoretical methods were much too primitive ...
Electron and nuclear spins in semiconductor
Electron and nuclear spins in semiconductor

Classical and Quantum Features of String Cosmology
Classical and Quantum Features of String Cosmology

... component in a higher–dimensional framework. We next describe a second mechanism by which chaos can be avoided that does not require the inclusion of additional matter components. This mechanism, which we term “controlled chaos,” is introduced in Chapter 4. Working in the context of cosmological mod ...
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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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