Is entanglement a fundamental resource for quantum information processing?

In summary, the connection between superposition and entanglement is that they are correlated, but decoherence erases the correlations and they are separate. There is no real difference between quantum and classical entropy, apart from the disconnect between the two.
  • #1
sirchasm
95
0
Does an Alics-Bob scenario include entropy, and does it increase if they both determine correct states?

What if they don't? Is knowing an entanglement exists an expectation? Is measuring it a probability?

So if there's expectation and probability (or maybe there isn't). is there information (with entropy)?
??(Hope this isn't too much for the mods here)
 
Physics news on Phys.org
  • #2
What is the connection between superposition, nonlocality and measurement?

No-one knows, or it isn't worth trying to answer - it's too trivial a question.

Why is entanglement unrelated to cosmology? Does anyone know? (I sure don't)
 
  • #3
sirchasm said:
Why is entanglement unrelated to cosmology? Does anyone know? (I sure don't)

Entanglement is a quantum mechanical phenomenon and, as such, this post is better suited to the Quantum Physics forum. Hence, it was moved.
 
  • #4
Entanglement is also a universal phenomenon. Can we assume that it only 'happens' if we do it (locally)?

What connection is there between entanglement and black holes or the information horizon?
 
  • #5
sirchasm said:
Entanglement is also a universal phenomenon. Can we assume that it only 'happens' if we do it (locally)?

This really has no meaning. Even if entanglement is a "universal phenomenon", it cannot be easily preserved! One loses coherence VERY quickly, even with just ONE interaction[1]! In fact, it has been shown the the loss of coherence is faster than the typical statistical decay[2]. It occurs very fast that it's been called an entanglement sudden death!

Zz.

[1] https://www.physicsforums.com/showpost.php?p=1498616&postcount=55
[2] Ting Yu and J.H. Eberly, Science v.323 p.598 (2009).
 
  • #6
Entanglement is a correlation; it gets 'decohered' by the environment, or measurement (these are equivalent 'decoherence' operators, at some scale).

What's the relationship between superposition and entanglement? Are they distinct or does one depend on the other?
Is entanglement just a "static" (time-independent) correlation? A sort of 'bit' stored in a memory, whereas 'dynamic' correlations are the equivalent of reading a bit from memory and processing it?

Decoherence is then just 'noise', in the channel, as it were? We need to use ECC in classical communication, we use QECC in quantum communication - this is (to me) an obvious kind of model.

The "problem" is how we get information into the classical domain - obviously it's already there in CC.

Hence the entropy angle, what is quantum information entropy, is it fundamentally different to classical entropy, or is there (apart from the disconnect between classical/quantum) no real difference. (Why should there be?)
 

Related to Is entanglement a fundamental resource for quantum information processing?

1. What is entanglement as a resource?

Entanglement as a resource refers to the phenomenon in quantum physics where two or more particles become connected in such a way that the state of one particle is dependent on the state of the other. This connection, or entanglement, can be used as a resource for various applications in quantum information processing, such as quantum communication and quantum computing.

2. How is entanglement created?

Entanglement can be created through a process called quantum entanglement, where particles are prepared in a specific way so that their states become dependent on each other. This can be achieved through various methods, such as using a beam splitter or through interaction with other particles.

3. Can entanglement be measured?

Yes, entanglement can be measured through various methods, such as using entanglement witnesses or performing Bell tests. These measurements can determine the degree of entanglement between particles and can also verify the presence of entanglement.

4. What are the applications of entanglement as a resource?

Entanglement has many potential applications in quantum information processing, including quantum communication, quantum key distribution, and quantum computing. It can also be used in quantum sensors and for enhancing the precision of measurements.

5. How is entanglement as a resource useful in quantum computing?

Entanglement is a crucial resource for quantum computing as it allows for the creation of quantum gates, which are the building blocks of quantum algorithms. Entanglement also enables quantum computers to perform certain computations faster and more efficiently than classical computers.

Similar threads

Replies
41
Views
2K
  • Quantum Physics
Replies
4
Views
1K
Replies
1
Views
865
Replies
8
Views
1K
  • Quantum Physics
Replies
6
Views
966
Replies
12
Views
265
Replies
19
Views
2K
  • Quantum Physics
Replies
10
Views
1K
  • Quantum Physics
Replies
7
Views
1K
  • Quantum Physics
Replies
4
Views
689
Back
Top