The erase of quantum states by measurement

  • #1
I was reading this article, http://www.nature.com/news/2009/090122/full/news.2009.50.html, and it was talking about how they 'teleported' a Ytterbium ion (Yb+) and mid-way through the article it said that they had to destroy the quantum state of the original Ytterbium ion and they did that by simply measuring its quantum state. Now my question is why??? Why was the quantum state erased by simply measuring it??
 

Answers and Replies

  • #2
5,607
40
The answer is in the preceding paragraph:

A quantum bit, on the other hand, lives in a fuzzy state of one and zero simultaneously. Worse still, measuring that bit directly will destroy its fuzziness, so quantum teleportation requires researchers to move the data without reading them first.

When you MEASURE [interact with] an entangled particle, you force it to assume some state. WHY this happens and exactly what it means are the subject of much debate; one thing for sure, it is not classically 'logical'....so it does not make 'sense'....

Read the first several posts here for a good discussion:

 
  • #3
Oh alright thanks, the fact that it doesn't make 'sense' I can understand because I have seen a lot of things in quantum mechanics that are....shall we say.... 'spooky'
However, I thank you for that link its very helpful!

Thanks,
Al
 

Related Threads on The erase of quantum states by measurement

Replies
17
Views
2K
  • Last Post
4
Replies
79
Views
6K
Replies
10
Views
1K
  • Last Post
Replies
8
Views
3K
  • Last Post
Replies
2
Views
800
  • Last Post
Replies
23
Views
4K
  • Last Post
Replies
12
Views
3K
  • Last Post
Replies
10
Views
1K
  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
9
Views
2K
Top