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  1. Quantum - Wikipedia

    In physics, a quantum (pl.: quanta) is the minimum amount of any physical entity (physical property) involved in an interaction. The fundamental notion that a property can be "quantized" …

  2. Quantum mechanics - Wikipedia

    Quantum mechanics is the fundamental physical theory that describes the behavior of matter and of light; its unusual characteristics typically occur at and below the scale of atoms. [2]: 1.1 It is …

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  4. Quantum | Definition & Facts | Britannica

    May 31, 2025 · Quantum, in physics, discrete natural unit, or packet, of energy, charge, angular momentum, or other physical property. Light, for example, appearing in some respects as a …

  5. What Is Quantum Physics? - Caltech Science Exchange

    Quantum physics is the study of matter and energy at the most fundamental level. It aims to uncover the properties and behaviors of the very building blocks of nature. While many …

  6. Demystifying Quantum: It’s Here, There and Everywhere

    Apr 10, 2024 · Quantum, often called quantum mechanics, deals with the granular and fuzzy nature of the universe and the physical behavior of its smallest particles. The idea of physical …

  7. DOE Explains...Quantum Mechanics - Department of Energy

    Quantum mechanics is the field of physics that explains how extremely small objects simultaneously have the characteristics of both particles (tiny pieces of matter) and waves (a …

  8. What is Quantum Mechanics? Explained Simply

    May 5, 2025 · Quantum mechanics tells us how systems evolve and what probabilities to expect—but it doesn’t explain how or why a single outcome emerges when we measure …

  9. What is quantum in physics and computing? - TechTarget

    Feb 27, 2025 · A quantum, the singular form of quanta, is the smallest discrete unit of any physical entity. For example, a quantum of light is a photon, and a quantum of electricity is an …

  10. Science 101: Quantum Mechanics - Argonne National Laboratory

    The field of quantum mechanics deals with the most fundamental bits of matter, energy and light and the ways they interact with each other to make up the world.

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