What is the meaning of dressed molecule

  • Thread starter yzxqdu
  • Start date
  • Tags
    Molecule
In summary, dressed molecules are two-particle states that are a combination of a tightly bound bare molecule and two unbound bare atoms. This description accurately explains phenomena such as Bose-condensation and the fermionic superfluid. The dressed-molecule picture also provides insights into the crossover between a Bose condensate of molecules and a fermionic superfluid. The nature of dressed molecules is largely determined by the probability of them being in the bare-molecular state.
  • #1
yzxqdu
3
0
I saw "dressed molecule" in a paper about BEC, what is the meaning of it?
 
Physics news on Phys.org
  • #2
Hi yzxqdu! :smile:

Does this help? …
dressed molecules are essentially two-particle states that are a superposition of a tightly bound bare molecule, and two unbound bare atoms. This description reduces to the correct paired wave-function in the two-body limit. Moreover it gives a physically correct description of all the phenomena mentioned above: the Bose-condensation of a gas near a Feshbach resonance, that contains molecules, is more correctly interpreted as a Bose-condensation of dressed molecules. The fermionic superfluid contains a condensate of bosonic pairs, normally called Cooper pairs, that can be understood as the dressed molecules. For the latter case, the dressed-molecule picture also gives an elegant characterization of the crossover between a Bose condensate of pure molecules on one side of the resonance, to a fermionic Bardeen-Cooper-Schrieffer superfluid on the other side. Then, the dressed molecules change continuously from being mostly a bare molecule, to being mostly a loose pair of two atoms. It is clear that the nature of the dressed molecules is much determined by the probability for it to be in the bare-molecular state.

from "http://igitur-archive.library.uu.nl/dissertations/2007-0215-201019/index.html" [Broken] / Matheus Wilhelmus Jozef Romans - [S.l.] : [s.n.], 2007 - Doctoral thesis Utrecht University"
 
Last edited by a moderator:
  • #3

In the context of BEC (Bose-Einstein Condensate), a dressed molecule refers to a composite particle made up of two or more atoms that have been manipulated or "dressed" by external fields. This manipulation can change the properties of the individual atoms, such as their energy levels and interactions, and can lead to the formation of new, exotic states of matter like BEC. The term "dressed" is used to emphasize the external influence on the molecule, as opposed to its natural state. Dressed molecules have been a topic of interest in BEC research due to their potential for creating new forms of matter and for studying quantum effects on a macroscopic scale.
 

1. What is a dressed molecule?

A dressed molecule refers to a molecule that has been coated or modified with a layer of material, typically for research or industrial purposes.

2. How is a molecule dressed?

A molecule can be dressed through various methods such as chemical reactions, physical coatings, or molecular assembly techniques. This process involves attaching a layer of material to the surface of the molecule, altering its properties and behavior.

3. What are the benefits of dressing a molecule?

Dressing a molecule can provide several benefits, including improved stability and durability, enhanced physical and chemical properties, and increased functionality for specific purposes such as drug delivery or sensing applications.

4. Can any molecule be dressed?

Yes, any molecule can potentially be dressed, although some may be more difficult or costly to dress than others. The ability to dress a molecule depends on its chemical structure and reactivity, as well as the desired properties of the final dressed molecule.

5. What are some real-world applications of dressed molecules?

Dressed molecules have a wide range of applications in various fields such as medicine, materials science, and environmental science. Some examples include drug delivery systems, self-cleaning surfaces, and sensors for detecting pollutants in the environment.

Similar threads

  • Atomic and Condensed Matter
Replies
3
Views
454
  • Atomic and Condensed Matter
Replies
19
Views
1K
  • Atomic and Condensed Matter
Replies
22
Views
545
  • Atomic and Condensed Matter
Replies
4
Views
1K
  • Atomic and Condensed Matter
Replies
9
Views
4K
  • Atomic and Condensed Matter
Replies
1
Views
1K
  • Atomic and Condensed Matter
Replies
4
Views
1K
  • Atomic and Condensed Matter
Replies
1
Views
941
  • Atomic and Condensed Matter
Replies
8
Views
1K
  • Atomic and Condensed Matter
Replies
5
Views
1K
Back
Top