# Criteria for boson and Bose Einstein Condensate

• tyogav
In summary, the conversation discusses the reason why an atom, specifically spin polarized hydrogen, cannot form a Bose-Einstein condensate. This is because it is a fermion, with an even number of nucleons and an odd number of electrons. This is proven through the example of Bose-Einstein condensation of atomic hydrogen. The correct answer in the given list of options is (d).
tyogav
The answer is given as (a). I want to know the reason. It is a boson. Why can't it form a Bose-Einstein condensate?

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I am amazed. I had no idea spin polarized hydrogen could exist.

DrClaude said:

Edit: To prove that it can't be (a), see Bose-Einstein Condensation of Atomic Hydrogen

So (d) would be the correct answer?

Yes, because it is the only atom in the list with an even number if nucleons and an odd number of electrons an hence a fermion.

DrDu said:
Yes, because it is the only atom in the list with an even number if nucleons and an odd number of electrons an hence a fermion.
Thanks

## 1. What is a boson?

A boson is a type of elementary particle that follows Bose-Einstein statistics, which means they can occupy the same quantum state at the same time.

## 2. How are bosons different from other particles?

Bosons have an integer spin, while other particles, such as fermions, have a half-integer spin. This difference in spin is what allows bosons to exhibit unique quantum behaviors, such as forming Bose-Einstein condensates.

## 3. What are the criteria for a particle to be considered a boson?

To be considered a boson, a particle must have an integer spin and obey Bose-Einstein statistics. This means that it must be able to occupy the same quantum state as other bosons and exhibit behaviors such as superposition and entanglement.

## 4. What is a Bose-Einstein condensate (BEC)?

A Bose-Einstein condensate is a state of matter that occurs when a group of bosons are cooled to near absolute zero. At this temperature, bosons lose their individual identities and merge into a single quantum state, exhibiting unique properties such as coherence and macroscopic quantum phenomena.

## 5. How are Bose-Einstein condensates used in scientific research?

Bose-Einstein condensates have been used in various research areas, such as studying quantum mechanics, superfluidity, and atomic clocks. They have also been used to develop technologies like atom interferometers and quantum sensors. In addition, scientists are still exploring potential applications of BECs in areas such as quantum computing and precision measurements.

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