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Related Concept Videos

Thomson's e/m Experiment01:19

Thomson's e/m Experiment

In a beam of charged particles created by a heated cathode, the particles move at different speeds. However, many applications need a beam with uniform particle speeds. An arrangement known as a velocity selector uses electric and magnetic fields to pick particles with a particular speed from the beam.
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The Atomic Theory of Matter02:59

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The earliest recorded discussion of the basic structure of matter comes from ancient Greek philosophers. Leucippus and Democritus argued that all matter was composed of small, finite particles that they called atomos, meaning “indivisible.” Later, Aristotle and others came to the conclusion that matter consisted of various combinations of the four “elements” — fire, earth, air, and water — and could be infinitely divided. Interestingly, these philosophers thought about atoms and “elements” as...
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Atomic Structure01:17

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The Greek philosopher Democritus proposed that everything on Earth is made up of tiny particles called atomos, Greek for "indivisible," from which the modern term "atom" is derived. In the 19th century, John Dalton proposed the atomic theory that is still largely correct today. He put forth five postulates to explain how atoms made up the world around us. (1) All matter is composed of infinitely small particles or atoms. (2) All atoms of a given element are identical to one another and (3) are...
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Updated: Jul 4, 2026

Preparing an Isotopically Pure 229Th Ion Beam for Studies of 229mTh
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Published on: May 3, 2019

3He: cosmological and atomic physics experiments.

Yuriy M Bunkov1

  • 1Institut Néel, CNRS et Université Joseph Fourier, BP 166, 38042 Grenoble Cedex 9, France.

Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences
|June 10, 2008
PubMed
Summary
This summary is machine-generated.

Superfluid helium-3 (3He) acts as a quantum vacuum, mirroring the Universe's properties. This allows experimental tests for cosmology and nuclear physics, exploring fundamental physics phenomena.

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Last Updated: Jul 4, 2026

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Area of Science:

  • Condensed matter physics
  • Quantum physics
  • Cosmology

Background:

  • The order parameter of superfluid helium-3 (3He) shares similarities with the structure of the Universe.
  • Superfluid condensates can be conceptualized as quantum vacuum systems.

Purpose of the Study:

  • To explore the potential of superfluid 3He as an experimental test system.
  • To investigate general physics problems in cosmology, atomic, and nuclear physics.

Main Methods:

  • Utilizing the superfluid condensate of 3He.
  • Investigating quasiparticles and topological defects within the condensate.

Main Results:

  • The superfluid condensate serves as a viable quantum vacuum analog.
  • It hosts various quasiparticles and topological defects.

Conclusions:

  • Superfluid 3He offers a unique experimental platform for studying fundamental physics.
  • It enables research into phenomena difficult to probe through other means, bridging condensed matter and cosmological physics.