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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 | 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 …

  3. 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 …

  4. 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 …

  5. 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.

  6. 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 …

  7. Progress Toward Practical Areas of Quantum Technology - CSIS

    Jul 15, 2025 · Quantum technologies have long underpinned modern foundational technologies, including lasers, atomic clocks, transistors, and semiconductor devices. Today, advancements …

  8. Homepage of Quantum Flagship | Quantum Flagship

    Jul 2, 2025 · The Second Quantum Revolution is unfolding now, exploiting the enormous advancements in our ability to detect and manipulate single quantum objects. The Quantum …

  9. Curious about quantum? - NSF - National Science Foundation

    Feb 16, 2023 · Q: What is quantum, and is there a "quantum realm"? The word “quantum" might sound mysterious, but it is commonly used to describe the world on the very small scales of …

  10. 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 …