- #91
DaTario
- 1,097
- 46
As AEM said, the brazilian group of quantum optics at UFRJ has worked on this subject a lot.
Best regards
DaTario
Best regards
DaTario
When does entanglement actually end?
- Context: Graduate
- Thread starter DrChinese
- Start date
-
- Tags
- Entanglement
Click For Summary
Discussion Overview
The discussion revolves around the concept of when quantum entanglement ends, particularly in the context of measurements and interactions involving polarizing beam splitters and other apparatus. Participants explore various interpretations and implications of entanglement, measurement, and the effects of external interactions on entangled particles.
Discussion Character
- Debate/contested
- Exploratory
- Technical explanation
Main Points Raised
- Some participants propose that entanglement ends when a measurement is made, specifically when an irreversible detection occurs, while others suggest that entanglement may persist under certain conditions, such as when paths are indistinguishable after passing through a beam splitter.
- One participant argues that entanglement is fundamentally about correlation between particles, which may be disrupted by interactions with other particles, but questions the verifiability of this claim.
- Another viewpoint suggests that the act of measurement, whether active or passive, constitutes a form of measurement that can affect entanglement, emphasizing the information-based nature of quantum mechanics.
- Some participants discuss the implications of different interpretations of quantum mechanics, such as the many-worlds interpretation (MWI) and how they relate to the concept of measurement and entanglement.
- There is a suggestion that the polarization of photons can be inferred through reflection, raising questions about whether this process could lead to disentanglement.
- A hypothetical scenario involving a randomizer and entangled photons is presented, questioning whether the uncertainty introduced could result in disentanglement.
Areas of Agreement / Disagreement
Participants express differing views on the conditions under which entanglement ends, with no consensus reached. Some agree that measurement plays a crucial role, while others challenge the notion that entanglement is solely dependent on measurement or external interactions.
Contextual Notes
Participants highlight the complexity of defining measurement in quantum mechanics and its implications for entanglement, noting that the discussion is influenced by various interpretations of quantum theory. There are unresolved questions regarding the effects of different experimental setups on entanglement.