• Study Resource
  • Explore
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
G25.2666: Quantum Mechanics II
G25.2666: Quantum Mechanics II

Lie Groups and Quantum Mechanics
Lie Groups and Quantum Mechanics

“Location” of Electrons in the Quantum Mechanical Model
“Location” of Electrons in the Quantum Mechanical Model

... • Each orbital contains a maximum of two electrons ...
Manipulation of electron spin in a quantum dot D. G
Manipulation of electron spin in a quantum dot D. G

Weak interactions and nonconservation of parity
Weak interactions and nonconservation of parity

... Before the recent developments on nonconservation of parity, it was customary to describe the neutrino by a four-component theory in which, as we mentioned before, to each definite momentum there are the two spin states of the neutrino vR and vL, plus the two spin states of the antineutrino YR and G ...
Rotation of electromagnetic fields and the nature of optical angular
Rotation of electromagnetic fields and the nature of optical angular

Symmetries and Conservation Laws
Symmetries and Conservation Laws

... bit more careful. There are a number of ways in which we can consider time reversal. For example, if we look at collisions on a billiard table when the cue ball strikes the colored balls on the break, it would clearly violate our sense of how things work if time were reversed. It is very unlikely th ...
A Primer on Quantum Mechanics and Orbitals
A Primer on Quantum Mechanics and Orbitals

The Dirac Equation March 5, 2013
The Dirac Equation March 5, 2013

... We’d rather have operators which are Lorentz invariant, than commute with the Hamiltonian. In general wave functions in the Standard Model are eigenstates of a Lorentz invariant quantity called the chirality. The chirality operator is γ 5 and it does not commute with the Hamiltonian. Due to this, it ...
BE 581
BE 581

Introduction: effective spin
Introduction: effective spin

4 Time evolution - McMaster Physics and Astronomy
4 Time evolution - McMaster Physics and Astronomy

Coherent population trapping of an electron spin in a single
Coherent population trapping of an electron spin in a single

SOLUTION OF DIRAC EQUATION FOR AN ELECTRON MOVING IN
SOLUTION OF DIRAC EQUATION FOR AN ELECTRON MOVING IN

Coherent Population Trapping of an Electron Spin in a Singly
Coherent Population Trapping of an Electron Spin in a Singly

“Measuring” the Density Matrix
“Measuring” the Density Matrix

Resolving Spin-Orbit- and Hyperfine
Resolving Spin-Orbit- and Hyperfine

Mathematical structure of magnons in quantum
Mathematical structure of magnons in quantum

Document
Document

Hopf fibration - Niles Johnson
Hopf fibration - Niles Johnson

... but rather tell us the various probabilities of observing all the physically possible results, if an observation were to be made. Crucially, if no observation is made, then the system cannot be said to be in any one state at all. This uncertainty is not simply a lack of information and understandi ...
Spin waves - Cornell Laboratory of Atomic and Solid State Physics
Spin waves - Cornell Laboratory of Atomic and Solid State Physics

... (iii) the quantum-mechanical ground state (and its correlations) are expressed in terms of them. Spin waves are the analog for magnetically ordered systems of lattice waves in solid systems; and just as a quantized lattice wave is called a “phonon”, a quantized spin wave is called a “magnon”. 1 Spin ...
Multi-electron atoms
Multi-electron atoms

Unification of Quantum Statistics ? It`s possible with quaternions to
Unification of Quantum Statistics ? It`s possible with quaternions to

Spin-orbit-induced spin-density wave in quantum wires and spin chains Oleg Starykh
Spin-orbit-induced spin-density wave in quantum wires and spin chains Oleg Starykh

Chapter 2 Quantum mechanics and probability
Chapter 2 Quantum mechanics and probability

< 1 ... 57 58 59 60 61 62 63 64 65 ... 94 >

Spin (physics)

In quantum mechanics and particle physics, spin is an intrinsic form of angular momentum carried by elementary particles, composite particles (hadrons), and atomic nuclei.Spin is one of two types of angular momentum in quantum mechanics, the other being orbital angular momentum. The orbital angular momentum operator is the quantum-mechanical counterpart to the classical notion of angular momentum: it arises when a particle executes a rotating or twisting trajectory (such as when an electron orbits a nucleus). The existence of spin angular momentum is inferred from experiments, such as the Stern–Gerlach experiment, in which particles are observed to possess angular momentum that cannot be accounted for by orbital angular momentum alone.In some ways, spin is like a vector quantity; it has a definite magnitude, and it has a ""direction"" (but quantization makes this ""direction"" different from the direction of an ordinary vector). All elementary particles of a given kind have the same magnitude of spin angular momentum, which is indicated by assigning the particle a spin quantum number.The SI unit of spin is the joule-second, just as with classical angular momentum. In practice, however, it is written as a multiple of the reduced Planck constant ħ, usually in natural units, where the ħ is omitted, resulting in a unitless number. Spin quantum numbers are unitless numbers by definition.When combined with the spin-statistics theorem, the spin of electrons results in the Pauli exclusion principle, which in turn underlies the periodic table of chemical elements.Wolfgang Pauli was the first to propose the concept of spin, but he did not name it. In 1925, Ralph Kronig, George Uhlenbeck and Samuel Goudsmit at Leiden University suggested a physical interpretation of particles spinning around their own axis. The mathematical theory was worked out in depth by Pauli in 1927. When Paul Dirac derived his relativistic quantum mechanics in 1928, electron spin was an essential part of it.
  • studyres.com © 2025
  • DMCA
  • Privacy
  • Terms
  • Report