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Related Concept Videos

Noble Gases02:54

Noble Gases

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The elements in group 18 are noble gases (helium, neon, argon, krypton, xenon, and radon). They earned the name “noble” because they were assumed to be nonreactive since they have filled valence shells. In 1962, Dr. Neil Bartlett at the University of British Columbia proved this assumption to be false.
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Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving11:21

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving

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We present a parametric driving method to cool an ultracold Fermi gas in a crossed-beam optical dipole trap. This method selectively removes high-energy atoms from the trap by periodically modulating the trap depth with frequencies that are resonant with the anharmonic components of the trapping potential.
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Fermi Level01:18

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The Fermi-Dirac function is represented by an S-shaped curve indicating the probability of an energy state being occupied by an electron at a given temperature. The Fermi level is the energy level at which there is a fifty percent chance of finding an electron, and it is positioned between the lower-energy valence band and the higher-energy conduction band.
At absolute zero temperature, electrons fill all energy states up to the Fermi level, leaving upper states empty. As the temperature rises,...
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Solution Formation02:16

Solution Formation

36.8K
There is no one solvent that can dissolve every type of solute. Some substances that readily dissolve in a certain solvent might be insoluble in a different solvent. A simple way to predict which substances dissolve in which solvent is the phrase "like dissolves like". This means that polar substances, such as salt and sugar, dissolve in a polar substance like water. In contrast, non-polar substances are more soluble in non-polar solvents such as carbon tetrachloride.
This selective...
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Molecular Comparison of Gases, Liquids, and Solids02:26

Molecular Comparison of Gases, Liquids, and Solids

53.8K
Particles in a solid are tightly packed together (fixed shape) and often arranged in a regular pattern; in a liquid, they are close together with no regular arrangement (no fixed shape); in a gas, they are far apart with no regular arrangement (no fixed shape). Particles in a solid vibrate about fixed positions (cannot flow) and do not generally move in relation to one another; in a liquid, they move past each other (can flow) but remain in essentially constant contact; in a gas, they move...
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Mixtures of Gases: Dalton's Law of Partial Pressures and Mole Fractions03:03

Mixtures of Gases: Dalton's Law of Partial Pressures and Mole Fractions

43.7K
Unless individual gases chemically react with each other, the individual gases in a mixture of gases do not affect each other’s pressure. Each gas in a mixture exerts the same pressure that it would exert if it were present alone in the container. The pressure exerted by each individual gas in a mixture is called its partial pressure.
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Updated: Jan 20, 2026

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving
11:21

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving

Published on: March 30, 2017

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Cluster Formation in Two-Component Fermi Gases.

X Y Yin1, Hui Hu1, Xia-Ji Liu1

  • 1Centre for Quantum and Optical Science, Swinburne University of Technology, Melbourne, Victoria 3122, Australia.

Physical Review Letters
|September 7, 2019
PubMed
Summary
This summary is machine-generated.

Two-component fermions form cluster states when interactions have a sufficient range, differing structurally from gas-like molecular states. This finding provides a condition for observing these novel cluster states in experiments.

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Noble Gases Properties and Xenon Chemistry
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Noble Gases Properties and Xenon Chemistry

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Related Experiment Videos

Last Updated: Jan 20, 2026

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving
11:21

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving

Published on: March 30, 2017

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Noble Gases Properties and Xenon Chemistry
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Noble Gases Properties and Xenon Chemistry

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Fermi Level
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Area of Science:

  • Quantum physics
  • Atomic physics
  • Few-body systems

Background:

  • Two-component fermions typically behave as a molecular gas near Bose-Einstein condensation with zero-range interactions.
  • Understanding the transition to different states is crucial for quantum many-body physics.

Purpose of the Study:

  • To investigate the conditions for the formation of cluster states in two-component fermionic systems.
  • To differentiate the structural properties of cluster states from gas-like states.
  • To identify experimental signatures for cluster state observation.

Main Methods:

  • Utilized an explicitly correlated Gaussian basis set expansion approach.
  • Calculated the binding energy of cluster states in trapped few-body systems.
  • Analyzed the structural properties of different fermionic states.

Main Results:

  • Cluster state formation occurs when the effective range of two-body interaction exceeds approximately 0.46 times the scattering length.
  • This condition is independent of the specific short-range interaction details.
  • Distinct structural differences were identified between cluster states and gas-like states.

Conclusions:

  • The effective interaction range is the key determinant for cluster state formation in two-component fermions.
  • The findings offer a clear criterion for identifying and potentially observing cluster states in experimental settings.