Xem 1-20 trên 843 kết quả Quantum
  • Many physical phenomena of great practical interest to engineers chemists, biologists, physicists, etc. were not in Gen. Phys. I & II Quantum Physics: The development of experimental equiment and techniques  modern physics can go inside the microscopic world (atoms, electrons, nucleus, etc.)  New principles, new laws for the microscopic (subatomic) world were discoverved

    pdf28p thanhan 22-07-2009 191 48   Download

  • Molecules, small structures composed of atoms, are essential substances for lives. However, we didn’t have the clear answer to the following questions until the 1920s: why molecules can exist in stable as rigid networks between atoms, and why molecules can change into different types of molecules. The most important event for solving the puzzles is the discovery of the quantum mechanics. Quantum mechanics is the theory for small particles such as electrons and nuclei, and was applied to hydrogen molecule by Heitler and London at 1927.

    pdf212p qsczaxewd 22-09-2012 76 36   Download

  • It has been known from the previous chapter that light, and in general, electromagnetic waves have particle behavior. Some latter time than the quantum theory of light, it was discovered that particles show also wavelike behavior. The wave-particle duality of matter is the fundamental concept of modern physics Newton’s classical physics should be replaced by the new mechanics which is able to describe the wave nature of particles

    pdf34p thanhan 22-07-2009 100 16   Download

  • At the end of the 19-th century, physics was at its most confidence situation. Classical phyics, as formulated in Newton’s law of mechanics and Maxwell’s theory of electromagnetism, have proved very successful in solving every problem. →At that time there seemed to be no question for which physics could not provide an answer !!! But then it came as a great shock when some simple phenomena were observed which could not be explained by classical physics →a new theory, quantum theory, was developed at the beginning of the 20-th century...

    pdf25p thanhan 22-07-2009 99 13   Download

  • Classical physics breaks down to the level of atoms and molecules. This was made possible by the invention of a new apparatus that enabled the introduction of measurements in microscopic area of physics. There were two revolutions in the way we viewed the physical world in the twentieth century: relativity and quantum mechanics. Quantum mechanics was born in 1924, through the work of Einstein, Rutherford and Bohr, Schrödinger and Heisenberg, Born, Dirac, and many others. The principles of quantum mechanics that were discovered then are the same as we know them today....

    pdf0p qsczaxewd 25-09-2012 39 12   Download

  • Perhaps quantum mechanics is viewed as the most remarkable development in 20th century physics. Each successful theory is exclusively concerned about "results of measurement". Quantum mechanics point of view is completely different from classical physics in measurement, because in microscopic world of quantum mechanics, a direct measurement as classical form is impossible. Therefore, over the years of developments of quantum mechanics, always challenging part of quantum mechanics lies in measurements.

    pdf0p cucdai_1 16-10-2012 32 11   Download

  • Nanoscale physics, nowadays one of the most topical research subjects, has two major areas of focus. One is the important field of potential applications bearing the promise of a great variety of materials having specific properties that are desirable in daily life. Even more fascinating to the researcher in physics are the fundamental aspects where quantum mechanics is seen at work; most macroscopic phenomena of nanoscale physics can only be understood and described using quantum mechanics. The emphasis of the present volume is on this latter aspect....

    pdf184p chuyenphimbuon 21-07-2012 32 10   Download

  • The development of quantum mechanics has taken physics in a vastly new direction from that of classical physics from the very start. In fact, there continue at present to be many developments in the subject of a very fundamental nature, such as implications for the foundations of physics, physics of entanglement, geometric phases, gravity and cosmology and elementary particles as well. It is hoped the papers in this volume will provide a much needed resource for researchers with regard to current topics of research in this growing area....

    pdf790p haiduong_1 15-04-2013 45 10   Download

  • The book embraces a wide spectrum of problems falling under the concepts of "Quantum optics" and "Laser experiments". These actively developing branches of physics are of great significance both for theoretical understanding of the quantum nature of optical phenomena and for practical applications.

    pdf0p cucdai_1 16-10-2012 31 7   Download

  • Chaos and the quantum mechanical behaviour of classically chaotic systems have been attracting increasing attention. Initially, there was perhaps more emphasis on the theoretical side, but this is now being backed up by experimental work to an increasing extent. The words 'Quantum Chaos' are often used these days, usually with an undertone of unease, the reason being that, in contrast to classical chaos, quantum chaos is ill defined; some authors say it is non-existent. So, why is it that an increasing number of physicists are devoting their efforts to a subject so fuzzily defined?...

    pdf341p camnhung_1 13-12-2012 26 7   Download

  • Contents Preface 1 The Wave Function 2 Time-Independent Schrödinger Equation 3 Formalism 4 Quantum Mechanics in Three Dimensions 5 Identical Particles 6 Time-Independent Perturbation Theory 7 The Variational Principle 8 The WKB Approximation 9 Time-Dependent Perturbation Theory 10 The Adiabatic Approximation 11 Scattering 12 Afterword Appendix Linear Algebra 2nd Edition – 1st Edition Problem Correlation Grid 2 3 14 62 87 132 154 196 219 236 254 268 282 283 299 .2 Preface These are my own solutions to the problems in Introduction to Quantum Mechanics, 2nd ed.

    pdf0p thanhhut2010 01-12-2012 24 5   Download

  • The fundamental Physics of the 20th century was constructed basically from two main theories, general relativity and quantum theory. The later allowed the construction of the standard model which describes three of the four known fundamental interactions in Nature, the exception being the gravity interaction. Unfortunately, general relativity and quantum theory have not been unified into a single coherent description of gravity in the microscopic level yet. The gravity quantization problem exists for almost one century and the final answer is yet unknown.

    pdf110p cucdai_1 16-10-2012 26 4   Download

  • (BQ) Part 2 book "Introduction to quantum computers" has contents: Unitary transformations and quantum dynamics, quantum dynamics at finite temperature, physical realization of quantum computations, linear chains of nuclear spins, experimental logic gates in quantum systems, error correction for quantum computers,...and other contents.

    pdf104p bautroibinhyen20 06-03-2017 6 4   Download

  • (BQ) Part 1 book "A guide to molecular mechanics and quantum chemical calculations" has contents: Potential energy surfaces, quantum chemical models, molecular mechanics models, graphical models, equilibrium geometries, reaction energies, equilibrium conformations,...and other contents.

    pdf412p bautroibinhyen20 06-03-2017 6 4   Download

  • (BQ) Part 2 book "A guide to molecular mechanics and quantum chemical calculations" has contents: Dealing with flexible molecules; obtaining and using transition state geometries; obtaining and interpreting atomic charges; obtaining and interpreting atomic charges,...and other contents.

    pdf404p bautroibinhyen20 06-03-2017 5 4   Download

  • (BQ) Part 1 book "Introduction to quantum computers" has contents: Introduction, the turing machine, binary system and boolean algebra, the quantum computer, the discrete fourier transform, quantum factorization of integers, logic gates, implementation of logic gates using transistors, reversible logic gates,...and other contents.

    pdf93p bautroibinhyen20 06-03-2017 4 3   Download

  • (BQ) Part 1 book "A guide to molecular mechanics and quantum chemical calculations" has contents: Potential energy surfaces, theoretical models, quantum chemical models, molecular mechanics models, graphical models, equilibrium geometries, reaction energies, equilibrium conformations,...and other contents.

    pdf428p bautroibinhyen20 06-03-2017 6 3   Download

  • (BQ) Part 2 book "A guide to molecular mechanics and quantum chemical calculations" has contents: Obtaining and interpreting atomic charges; kinetically controlled reactions, applications of graphical models, obtaining and using transition state geometries.

    pdf388p bautroibinhyen20 06-03-2017 4 3   Download

  • Collection of research reports best university in 2007 honored the author: 12. Truong Van Nam, Nguyen Xuan Dung, study the effect of substituents on the properties of aniline by approximate methods AM1 quantum ... Quantum mechanics is one of the fundamental theory of physics. Quantum mechanics is an extension and supplement of Newtonian mechanics (also known as classical mechanics). It is the basis of many other disciplines of physics and chemistry as solid state physics, chemistry quantum particle physics.

    pdf6p phalinh14 07-08-2011 47 2   Download

  • QDs play an important role mainly in the imaging and as highly fluorescent probes for biological sensing that have better sensitivity, longer stability, good biocompatibility, and minimum invasiveness. The fluorescent properties of QDs arise from the fact, that their excitation states/band gaps are spatially confined, which results in physical and optical properties intermediate between compounds and single molecules. Depending on chemical composition and the size of the core which determines the quantum confinement, the emission peak can vary from UV to NIR wavelengths (400–1350 nm).

    pdf181p bachduong1311 10-12-2012 13 1   Download


Đồng bộ tài khoản