Quantum State Vector

  • Thread starter Quarlep
  • Start date
  • #1
257
4
"Let’s begin by labeling the possible spin states along the three coordinate axes. If A is oriented along the z axis, the two possible states that can be prepared correspond to σz= ±1. Let’s call them up and down and denote them by ket-vectors |u> and |d> . Thus, when the apparatus is oriented along the z axis and registers +1, the state |u> has been prepared. " says in The Theoritical Minimum

what it means ? In particular "the state |u> has been prepared" Actually I am asking just this part
 

Answers and Replies

  • #2
DrClaude
Mentor
7,554
3,894
It means that the system is in state |u>,
$$
| \psi \rangle = | \mathrm{u} \rangle
$$
 
  • #3
jfizzix
Science Advisor
Insights Author
Gold Member
757
355
By saying that the state [itex]|u\rangle[/itex] is prepared, one can assume that all subsequent measurements of that same system will be as though the system is in state [itex]|u\rangle[/itex].
 

Related Threads on Quantum State Vector

Replies
3
Views
992
  • Last Post
Replies
11
Views
1K
Replies
15
Views
5K
Replies
5
Views
2K
  • Last Post
Replies
6
Views
358
Replies
3
Views
2K
Replies
1
Views
1K
Replies
1
Views
388
  • Last Post
Replies
1
Views
705
Top