Scientists at RIKEN have proposed a new way to make quantum systems synchronize in only one directionโlike a one-way street for sound particles known as phonons. The breakthrough combines two quantum effects to create a form of one-way quantum synchronization that remains surprisingly stable even when exposed to manufacturing flaws and environmental noise, two major obstacles that have long hindered real-world quantum technologies.
Poetry: Representations
Finally, a revelation! I was asking myself: Why do I often find ancient, terse, illustration-free textbooks easier to follow than their modern, friendly, playful, illustrated, multi-media-enhanced counterparts? Case in point (and I know that not everybody will agree): Paul Dirac's legendary Principles of Quantum Mechanics or the definitive course on theoretical physics, the volumes by Landau and Lifshitz. In modern lectures and articles such resources may be announced as "valuable but not [โฆ]
Poetry: Dynamical Variables and Observables
The lines of the following poem are phrases selected from consecutive pages of the second chapter of Paul Dirac's Principles of Quantum Mechanics, Fourth Edition, Dynamical Variables and Observables. we may look upon the passagefor the triple product We therefore make the general rulein spite of this fundamental difference which conforms with our notationThe rule may easily be extended By repeating the processUsing this terminology, we can assert that Suppose we have a solutionTaking the [โฆ]https://elkement.art/2020/09/24/poetry-dynamical-variables-and-observables/
Poetry: The Principle of Superposition
The lines of the following poem are phrases selected from consecutive pages of the first chapter of Paul Dirac's Principles of Quantum Mechanics, Fourth Edition (Revised), The Principle of Superposition. ~ one would be inclined to think There must certainly be some internal motion from general philosophical grounds we cannot expect to find any causal connexion observe what appears on the back side of the crystal all that can legitimately be asked somewhere in the region of space [โฆ]https://elkement.art/2020/09/13/poetry-the-principle-of-superposition/
A team at the University of Chicago has discovered a surprisingly simple way to create powerful quantum states that are normally difficult to produce. By making small adjustments to the energy levels of atoms inside an optical cavity, researchers can generate a wide variety of highly entangled states without adding complicated hardware.
Scientists have uncovered unexpected quantum complexity inside cobalt, a metal long thought to be fully understood. Advanced measurements revealed a dense network of topological electronic states that remain robust at room temperature. These states enable extremely fast electron behavior and can be switched or controlled using magnetism. The discovery could open new paths toward next-generation computing and spin-based devices.
A. S. Kompaneyets โ A Course Of Theoretical Physics (Vols. 1 and 2)
Volume 1 of this course of theoretical physics deals with the fundamental laws of physics. The text lucidly presents for students and workers in theoretical physics the fundamental principles underlying the findings of experimental physics. It gives a unified presentation of classical mechanics, electrodynamics, and quantum mechanics and provides an excellent foundation for the study of more advanced topics in atomic, molecular, and solid-state physics. Fundamental laws can be read by students who have had courses in introductory physics, electricity, and magnetism.
Volume 2 of this course of theoretical physics deals with statistical laws, the basic structure remains essentially the same. The author has selected those topics he felt to be of general interest. The book includes, for instance, sections on fluctuations, Gibbs statistics, detonation waves, ferromagnetism, and the theory of semiconductors. Statistical laws can be read by a student who has had courses in classical mechanics, electrodynamics, and quantum mechanics. Numerous exercises combine with the masterly coverage of the subject to make statistical laws an essential text for university and college students.
Alexander S. Kompaneyets (1914-1974)
Professor Alexander Solomonovich Kompaneyets was a leading Soviet theoretical physicist from 1946 Until his untimely death he worked at the Institute of Chemical Physics of the USSR Academy of Sciences, contributing, among other things, to the development of nuclear energy in the Soviet Union in all its aspects.
The book was translated from the Russian by V. Talmy and was published by Mir in 1978.
You can get the Volume 1 here and here
You can get the Volume 2 here and here
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CONTENTS
Volume 1
Preface โ 5
PART I. MECHANICS
PART II. ELECTRODYNAMICS
PART III. QUANTUM MECHANICS
Supplementary Exercises โ 547
Index โ 557
Volume 2
Preface โ 5
PART I. STATISTICAL PHYSICS
PART II. HYDRODYNAMICS AND GAS DYNAMICS
PART III. ELECTRODYNAMICS OF CONTINUOUS MEDIA
PART IV. PHYSICAL KINETICS
Index โ 502
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Researchers have developed a compact quantum detector that makes terahertz radiation much easier to detect. A specially designed metasurface funnels incoming energy into tiny active regions, greatly strengthening the electrical signal produced. The approach boosted efficiency by roughly 20 times compared to earlier designs and could pave the way for more practical THz devices in healthcare, communications, and scientific research.
Jack C.M
elkement
Mir Books