Solid state quantum entanglement?

In summary, the conversation discusses the topic of solid state entanglement, specifically in relation to an experiment described in a linked paper. It is mentioned that solid state entanglement has been demonstrated before, with the first instance occurring roughly 7-8 years ago. The discussion also touches on the broader field of solid state quantum information processing and the potential applications of entanglement in this field. Ultimately, the focus of the experiment in the linked paper is somewhat unclear, with potential applications in both quantum information processing and investigating EPR-type phenomena.
  • #1
SW VandeCarr
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The linked paper describes an experiment which is intended to provide for a basis for investigating solid state spin entangled electrons. Has solid state entanglement been demonstrated before?

http://physics.aps.org/pdf/10.1103/PhysRevLett.104.026801.pdf [Broken]
 
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  • #2
Sure, many times. I don't remember who did it first but it was 7-8 years ago.
That is at least if you mean entanglement of two or more or more qubits via some form of electromagnetic coupling (as opposed to entanglement of spatialy separated Cooper pairs, which is what is demonstrated in this paper)
Solid state QIP is a large fields so there are lots of publications.

Btw, there is a nice perspective of this paper in Physics (the free online APS journal)
 
  • #3
Has solid state entanglement been demonstrated before?
Sorry to be facetious but even the most mundane antiferromagnet has an entangled ground state; you can't do anything remotely interesting in solid state physics without the fact of entanglement.

Regarding solid state QIP, I defer to f95toli's reply.
 
  • #4
peteratcam said:
Sorry to be facetious but even the most mundane antiferromagnet has an entangled ground state; you can't do anything remotely interesting in solid state physics without the fact of entanglement.

Regarding solid state QIP, I defer to f95toli's reply.

Ok. My question wasn't specific. This paper deals with spatially separated Cooper Pairs anticipating later quantum "opticslike" experiments with spin entangled electrons. I'm not even sure whether their main interest is QIP or investigating EPR type phenomena for is own sake.
 
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1. What is solid state quantum entanglement?

Solid state quantum entanglement is a phenomenon in which two or more particles become connected in such a way that the state of one particle is dependent on the state of the other, regardless of the distance between them. This means that changes in one particle will affect the other, even if they are separated by great distances.

2. How is solid state quantum entanglement different from regular entanglement?

Solid state quantum entanglement refers specifically to the entanglement of particles in solid state materials, such as crystals or semiconductors. This is different from regular entanglement, which can occur in various systems, including photons and atoms.

3. What are the potential applications of solid state quantum entanglement?

Solid state quantum entanglement has potential applications in quantum computing, quantum communication, and quantum sensing. It could also be used to create more secure forms of communication and encryption.

4. How is solid state quantum entanglement created?

Solid state quantum entanglement can be created through a process called quantum entanglement swapping, in which two initially unentangled particles interact with a third particle that is entangled with another particle. This results in the two original particles becoming entangled with each other.

5. What are the challenges in studying solid state quantum entanglement?

One of the main challenges in studying solid state quantum entanglement is maintaining the entanglement over a long distance. Another challenge is controlling and manipulating the entangled particles in a solid state material. Additionally, there are technical challenges in measuring and interpreting the entangled states of particles in solid state systems.

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