Quantum Mechanics
The physics governing behavior of matter and energy at atomic and subatomic scales.
Also: QM · quantum physics
Definition
Quantum mechanics is the fundamental theory of physics that describes the behavior of matter and energy at the smallest scales, including atoms and subatomic particles. It introduces concepts such as quantization of energy, wave functions, and the probabilistic nature of physical measurements. Quantum mechanics underlies modern technologies including semiconductors, lasers, and MRI machines.
Example
“The transistors inside a smartphone rely on quantum tunneling, where electrons pass through energy barriers that classical physics says they cannot cross, enabling the switching action that makes computing possible.”
Usage Examples
- 1
“The team applied quantum mechanics best practices to improve their physics outcomes significantly.”
- 2
“Understanding quantum mechanics is essential for anyone building a career in STEM.”
When & How to Use
Use 'Quantum Mechanics' when working in Physics contexts where quantum mechanics is the fundamental theory of physics that describes the behavior of matter and energy at the smallest scales, including atoms and subatomic particles.
- ▸Applying quantum mechanics principles during a physics project or initiative
- ▸Explaining quantum mechanics to a junior team member or stakeholder unfamiliar with STEM
- ▸Evaluating options or proposals using quantum mechanics as a decision-making criterion
Etymology & Origin
The term 'Quantum Mechanics' derives from professional usage and entered STEM professional usage as the field formalised in the 20th century.
History & Evolution
The concept of quantum mechanics has evolved alongside STEM. Early practitioners relied on informal methods; structured approaches emerged with the professionalisation of physics in the mid-20th century. Today, quantum mechanics is a standard part of STEM practice globally.
Synonyms
- quantum physics
- quantum theory
- wave mechanics
Antonyms / Opposites
- classical mechanics
- Newtonian mechanics
Images
CC-licensed · free to useVideo
Related Terms
- Wave-Particle Duality
- Heisenberg Uncertainty Principle
- Schrodinger Equation
- Quantum Entanglement