en.wikipedia.org/wiki/Quantum_mechanicsQuantum mechanics (QM; also known as quantum physics, quantum theory, the wave mechanical model and matrix mechanics), including quantum field theory, is a fundamental theory in physics.It describes advanced properties of nature on an atomic scale.. Classical physics, the description of physics that existed before the theory of relativity and quantum mechanics, describes many aspects of nature ...
www.britannica.com/science/quantum-mechanics-physicsQuantum mechanics, science dealing with the behavior of matter and light on the atomic and subatomic scale. It attempts to describe and account for the properties of molecules and atoms and their constituents—electrons, protons, neutrons, and other more esoteric particles such as quarks and gluons.
www.livescience.com/33816-quantum-mechanics-explanation.htmlQuantum mechanics is the branch of physics relating to the very small. It results in what may appear to be some very strange conclusions about the physical world.
plato.stanford.edu/entries/qmQuantum mechanics is, at least at first glance and at least in part, a mathematical machine for predicting the behaviors of microscopic particles — or, at least, of the measuring instruments we use to explore those behaviors — and in that capacity, it is spectacularly successful: in terms of power and precision, head and shoulders above any theory we have ever had.
www.pbs.org/transistor/science/info/quantum.htmlScientists interpret quantum mechanics to mean that a tiny piece of material like a photon or electron is both a particle and a wave. It can be either, depending on how one looks at it or what ...
www.britannica.com/science/physics-science/Quantum-mechanicsPhysics - Physics - Quantum mechanics: Although the various branches of physics differ in their experimental methods and theoretical approaches, certain general principles apply to all of them. The forefront of contemporary advances in physics lies in the submicroscopic regime, whether it be in atomic, nuclear, condensed-matter, plasma, or particle physics, or in quantum optics, or even in the ...
simple.wikipedia.org/wiki/Quantum_physicsQuantum Mechanics or QM, describes how the Universe works at the level smaller than atoms. It is also called "quantum physics" or "quantum theory". Quantum is the Latin word for 'how much', and mechanics is the area of science concerned with motion. A quantum of energy is a specific amount of energy, and Quantum Mechanics describes how that energy moves and interacts at the sub-atomic level.
en.wikipedia.org/wiki/Introduction_to_quantum_mechanicsQuantum mechanics is the science of the very small. It explains the behavior of matter and its interactions with energy on the scale of atomic and subatomic particles.By contrast, classical physics explains matter and energy only on a scale familiar to human experience, including the behavior of astronomical bodies such as the Moon. Classical physics is still used in much of modern science and ...
farside.ph.utexas.edu/teaching/qmech/qmech.pdfquantum mechanics in a more systematic fashion in Chapter 4. Quantum mechanics is used to examine the motion of a single particle in one dimension, many particles in one dimension, and a single particle in three dimensions, in Chapters 5, 6, and 7, respectively.
www.thoughtco.com/quantum-physics-overview-2699370Quantum physics is sometimes called quantum mechanics or quantum field theory. It also has various subfields, as discussed above, which are sometimes used interchangeably with quantum physics, though quantum physics is actually the broader term for all of these disciplines.