That queer experiment; what is its limit?

In summary, the conversation discusses a quantum experiment where a light beam appears to take two paths. The question is raised about the distance limit for this phenomenon and it is mentioned that there have been entanglement experiments with distances of about 1km. It is suggested that theoretically, there is no upper limit and a delayed choice experiment is referenced as an example. Links to experiments of this nature are also provided.
  • #1
EroticNirvana
25
0
Some of you may have heard of this experiment:

http://www.cs.caltech.edu/~westside/quantum-intro.html


I'm thinking of the experiment at the top of the page where the light beem seems to take two paths.

Does anyone know whether there is a limit for how far you can let this beem "travel in both directions". E.g. we might try to let the beem travel 1km.
 
Last edited by a moderator:
Physics news on Phys.org
  • #2
come on, someone please help me out!
 
  • #3
IIRC there have been entanglement experiments with distances of that order. Don't quote me on this though.
 
  • #4
No, theoretically there shouldn't be any upper limit. In the context of something called the "delayed choice experiment", I've often seen the suggestion that an astronomer could, depending on her choice of measurement, determine whether a photon emitted millions of years ago behaves as though it took a single path around a galaxy or whether it behaves as though it took both paths at once--see the section entitled 'Does our choice "change the past"?' from this page on the delayed-choice experiment. I don't know whether an experiment of this type has actually been performed, though.
 
  • #5
got link?

inha said:
IIRC there have been entanglement experiments with distances of that order. Don't quote me on this though.

Thx. If anyone´s got a link or reference to such a "long distance" experiment I´d be very thankful.
 
  • #6
EroticNirvana said:
Thx. If anyone´s got a link or reference to such a "long distance" experiment I´d be very thankful.
http://arxiv.org/PS_cache/quant-ph/pdf/9707/9707042.pdf

http://arxiv.org/PS_cache/quant-ph/pdf/9806/9806043.pdf

http://www.gap-optique.unige.ch/Publications/Pdf/Optics98.pdf
 
Last edited by a moderator:

1. What is a queer experiment?

A queer experiment is a scientific experiment that challenges traditional ideas and beliefs, often exploring unconventional or controversial topics.

2. What is the limit of a queer experiment?

The limit of a queer experiment is subjective and can vary depending on the specific experiment and its findings. Some may argue that there is no limit, as science is constantly evolving and pushing boundaries.

3. How is a queer experiment different from a traditional experiment?

A queer experiment differs from a traditional experiment in that it may challenge commonly accepted theories and ideas, and may involve exploring topics that are considered taboo or controversial.

4. Are queer experiments important in the scientific community?

Yes, queer experiments are important in the scientific community as they allow for the exploration of new ideas and perspectives, and can lead to breakthroughs and advancements in various fields.

5. How do scientists ensure the validity of a queer experiment?

Like any other experiment, scientists ensure the validity of a queer experiment through rigorous testing, peer review, and replication. They also follow ethical guidelines and adhere to scientific principles to ensure the accuracy and reliability of their findings.

Similar threads

A Call for experiment : Delayed Choice and Quantum Zeno Effect
    • Quantum Physics
Replies
18
Views
1K
B Can we say a photon doesn't exist until the wavefunction collapses?
    • Quantum Physics
Replies
16
Views
1K
A Experiments probing the macroscopic limits of QM
    • Quantum Physics
2
Replies
45
Views
10K
I A question about the delayed choice quantum eraser experiment
    • Quantum Physics
Replies
2
Views
2K
B Multiple Sequential Delayed Choice Experiment
    • Quantum Physics
Replies
5
Views
766
A In light of new evidence, what might be behind the Casimir Effect?
    • Quantum Physics
2
Replies
46
Views
2K
I Mach-Zehnder interferometer, but with an entangled beam?
    • Quantum Physics
Replies
33
Views
2K
B Does Retrospective Indeterminacy Reveal a Deterministic Universe?
    • Quantum Physics
Replies
12
Views
1K
I Human eyes can detect single photons?
    • Quantum Physics
Replies
19
Views
2K
I Use of polarization to experimentally check photon mass?
    • Quantum Physics
Replies
1
Views
953

Hot Threads

Recent Insights

Back
Top