Solid state quantum entanglement?

Click For Summary

Discussion Overview

The discussion revolves around the demonstration of solid state quantum entanglement, particularly in the context of spin entangled electrons and the implications for quantum information processing (QIP) and EPR-type phenomena. Participants explore prior instances of solid state entanglement and the relevance of the linked paper to ongoing research in the field.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant references a linked paper that aims to investigate solid state spin entangled electrons and questions whether solid state entanglement has been previously demonstrated.
  • Another participant asserts that solid state entanglement has been demonstrated multiple times, mentioning electromagnetic coupling of qubits and distinguishing it from the entanglement of spatially separated Cooper pairs discussed in the paper.
  • A different participant emphasizes that even basic antiferromagnets exhibit entangled ground states, suggesting that entanglement is fundamental to solid state physics.
  • The same participant expresses uncertainty about the primary focus of the linked paper, questioning whether it is more aligned with QIP or EPR-type phenomena.

Areas of Agreement / Disagreement

Participants express differing views on the specifics of solid state entanglement demonstrations, with some asserting its established presence in the field while others seek clarification on the nuances of the linked paper's focus. The discussion remains unresolved regarding the implications of the paper and the broader context of solid state entanglement.

Contextual Notes

There is ambiguity regarding the definitions of solid state entanglement and the specific types of entangled states being referenced. The discussion also highlights the complexity of distinguishing between different forms of entanglement in solid state systems.

SW VandeCarr
Messages
2,199
Reaction score
77
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
 
Last edited by a moderator:
Physics news on Phys.org
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)
 
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.
 
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.
 
Last edited:

Similar threads

Graduate Is delayed choice remote entanglement of photons derived from TDSE?
  • · Replies 58 ·
2
Replies
58
Views
5K
Undergrad How Do You Break Quantum Entanglement Bonds?
  • · Replies 7 ·
Replies
7
Views
7K
Undergrad How Can Laser Light Mixing Reveal Quantum Entanglement?
  • · Replies 16 ·
Replies
16
Views
3K
Graduate Do entanglement networks encode a unique, local historical record?
  • · Replies 2 ·
Replies
2
Views
2K
Graduate "Nonclassical Advantage in Metrology" paper
  • · Replies 0 ·
Replies
0
Views
1K
Graduate Can entanglement be detected in a single Bell pair?
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Does quantum entanglement depend on the chosen basis?
  • · Replies 37 ·
2
Replies
37
Views
7K
Graduate One-Way Quantum Steering Evidence: Quantumness Experiments
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Entanglement Witnesses close to GHZ states
  • · Replies 1 ·
Replies
1
Views
1K
High School Entangled particle decoherence question
  • · Replies 4 ·
Replies
4
Views
2K