spin is the symmetry of something, if it has a spin of 1, then you need to rotate the thing 1 full circle for it to look the same as when you didn't rotate it. if it has a spin of 1/2, then you need to rotate it 1/2 of a circle. it is actually possible for something to have a spin of 2 (2 full circles) or higher.
In quantum physics, "spin up" and "spin down" refer to the two possible orientations of an elementary particle's intrinsic angular momentum, or spin. These terms are used to describe the projection of the particle's spin along a specified axis. The spin can be thought of as the particle's intrinsic magnetic moment.
A quantum state with zero spin in physics is called a singlet state. This means that the total angular momentum of the system is zero. This term is commonly used in the context of quantum mechanics to describe certain states of particles.
Fermions -- and that includes leptons and neutrinos -- all have a spin value of one-half. This is also true for every quark. Pions has zero spin.
This theorem of quantum physics says something about integer-spin particles and half-integer spin particles. For more information see the article I've associated with this answer.
Quantum numbers are used to categorize and describe the properties of elementary particles in quantum mechanics. These numbers include values like electric charge, spin, lepton number, and baryon number, which help to distinguish different particles and predict their behavior. Each quantum number corresponds to a specific observable quantity that characterizes the particle's unique properties within a given system.
There is no quantum physics of a moose. Quantum physics is a type of theoretical physics, and its laws do not apply to physical objects
Nothing. Quantum is a branch of physics
The Holstein-Primakoff transformation is important in quantum mechanics because it allows for the treatment of spin systems as harmonic oscillators. This transformation simplifies the mathematical description of spin interactions and has applications in various areas of quantum physics, such as studying phase transitions and quantum information processing.
singlet, or 10 down in the Telegraph crossword
Spin-1/3 particles in quantum mechanics are a type of elementary particle that have a specific intrinsic angular momentum, or "spin," value of 1/2. This means they can have two possible spin states: spin up and spin down. These spin-1/3 particles differ from other spin values, such as spin-0 or spin-1 particles, in that they follow different rules and behaviors in quantum mechanics. For example, spin-1/3 particles obey Fermi-Dirac statistics, which dictate how identical particles with half-integer spin values behave in quantum systems. Overall, the unique properties of spin-1/3 particles play a crucial role in understanding the behavior of matter at the quantum level and are fundamental to many aspects of modern physics.
The theoretical Higgs boson would have zero spin. The neutral and charged pions also have zero spin. Two entangled particles, each with spin opposite to each other, would be a quantum state with zero net spin. Atoms may also have zero spin, if they are in what is known as S-states (e.g. the ground state of hydrogen).
Quantum Mechanics is a branch of physics describing the behavior of energy and matter at the atomic and subatomic scales. It explains it itself and Quantum Physics is the same deal. They're just two different ways in saying it.