**Quantum mechanics** (QM; also known as **quantum physics** or **quantum theory**), including **quantum field theory**, is a branch of physics which is the fundamental theory of nature at small scales and low energies of atoms and subatomic particles. Classical physics, the physics existing before **quantum mechanics**, derives from **quantum mechanics** as an approximation valid only at large (macroscopic) scales. **Quantum mechanics** differs from classical physics in that energy, momentum and other quantities are often restricted to discrete values (quantization), objects have characteristics of both particles and waves (wave-particle duality), and there are limits to the precision with which quantities can be known (Uncertainty principle).

**Quantum mechanics** gradually arose from Max Planck's solution in 1900 to the black-body radiation problem (reported 1859) and Albert Einstein's 1905 paper which offered a quantum-based theory to explain the photoelectric effect (reported 1887). Early quantum theory was profoundly reconceived in the mid-1920s.

The reconceived theory is formulated in various specially developed mathematical formalisms. In one of them, a mathematical function, the wave function, provides information about the probability amplitude of position, momentum, and other physical properties of a particle.

Important applications of quantum theory include quantum chemistry, superconducting magnets, light-emitting diodes, and the laser, the transistor and semiconductors such as the microprocessor, medical and research imaging such as magnetic resonance imaging and electron microscopy, and explanations for many biological and physical phenomena. Wikipedia, Quantum Physics/Mechanics

See Also

**A Newly Discovered Law of Physics**
**astrophysics**
**Biophysics**
**classical physics**
**Field Physics**
**Figure 3.37 - Successive Centralizations or Quantum Leap**
**Journal of Sympathetic Vibratory Physics**
**Laws Useful in Sympathetic Vibratory Physics**
**Love in Science and Physics**
**metaphysics**
**nuclear physics**
**On the Partial Differential Equations of Mathematical Physics**
**particle physics**
**physics**
**plasma physics**
**Quantization - Physics**
**quantum**
**quantum acoustics**
**Quantum Arithmetic**
**Quantum Arithmetic Elements**
**quantum chromodynamics**
**quantum chronology**
**Quantum coupling**
**quantum electrodynamics**
**Quantum Entanglement**
**quantum field**
**quantum field theory**
**Quantum Leap**
**quantum mechanics**
**quantum number**
**quantum singularity**
**quantum state**
**quantum theory**
**Quantum Transition**
**Subtle Energy Physics**
**SVP physics and dynamics**
**sympathetic physics**
**Sympathetic Vibration v Newtonian Physics**
**Sympathetic Vibratory Physics**
**Sympathetic Vibratory Physics - An Abstract**
**Sympathetic Vibratory Physics - The Basic Principles**
**Sympathetic Vibratory Physics teaches**
**Sympathetic Vibratory Physics vs Quantum Entanglement**
**Table of Quantum Particles**
**The Physics of Love**
**The Physics of Love - Volume 2**
**The Physics of Love - Volume 2 Introduction**
**The Physics of Love 2.0**
**Vibratory Physics - The Connecting Link between Mind and Matter**
**Vibratory Physics - True Science**
**15.13 - Dissociating Water Acoustically - Liberation of Quantum Constituents**
**2.14 - Spirit as a Physics Attribute**
**3.22 - Quantum Leap Delta equivalent to Locked Potentials Delta**
**4.10 - Component Dynamics of Quantum Construction**
**7B.08 - The Etheric Quantum Soup**