Graduate Schmidt decomposition - How do I find the matrix related to the state?

Click For Summary
The discussion centers on understanding the Schmidt decomposition and its application in determining the entanglement of states. The user seeks clarity on how to represent a quantum state as a matrix to apply Singular Value Decomposition (SVD) and extract Schmidt coefficients. They reference a specific exercise involving a mapping from C^2⊗C^3 to C^6, which includes 36 unspecified constants, raising concerns about the completeness of the problem statement. The user expresses confusion over the multiple possibilities for the constants and their implications for the exercise. Overall, the thread highlights the challenges in applying Schmidt decomposition to complex quantum states.
Arquimedes
Messages
2
Reaction score
0
TL;DR
How to writte the matrix associated to the state, so I can apply the Singular Value Decomposition to that matrix and get the Schmidt coefficients.
Hello, I am currently studying the Schmidt decomposition and how to use it to determine if a state is entangled or not and I can't understand how to write the state as a matrix so I can apply the Singular Value Decomposition and find the Schmidt coefficients. The exercise I am trying to complete is this one:;

problem25.png
 
Physics news on Phys.org
A general mapping from ##\mathbb{C}^2\otimes\mathbb{C}^3## to ##\mathbb{C}^6## may be written,

##v_i = \sum_{k=1}^2 \sum_{m=1}^3 \alpha_{i k m} u_k w_m##

there are 36 unspecified constants, ##\alpha_{i k m}##. So there are many possibilities. I think the problem statement is incomplete?
 
Last edited:
I am slowly going through the book 'What Is a Quantum Field Theory?' by Michel Talagrand. I came across the following quote: One does not" prove” the basic principles of Quantum Mechanics. The ultimate test for a model is the agreement of its predictions with experiments. Although it may seem trite, it does fit in with my modelling view of QM. The more I think about it, the more I believe it could be saying something quite profound. For example, precisely what is the justification of...

Similar threads

  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 5 ·
Replies
5
Views
2K
  • · Replies 4 ·
Replies
4
Views
5K
  • · Replies 8 ·
Replies
8
Views
2K
  • · Replies 1 ·
Replies
1
Views
1K
  • · Replies 2 ·
Replies
2
Views
1K
  • · Replies 2 ·
Replies
2
Views
369
  • · Replies 4 ·
Replies
4
Views
2K
  • · Replies 7 ·
Replies
7
Views
1K
  • · Replies 1 ·
Replies
1
Views
2K