Quantum Astronomy

wally123 · Dec 9, 2004

What's up with the Quantum Astronomy - SETI Thrusday articles? I'm dying for the next installment.

thechemist · Dec 9, 2004

a link would help <img src="/images/icons/wink.gif" /> <div class="Discussion_UserSignature"> I feel better than James Brown. </div>

aluxeterna · Dec 9, 2004

Agreed! These are some of the most interesting articles to come out of seti thursdays for a while, and after teasing us with the first two thursday articles, the last two are not forthcoming! What's going on?

odysseus145 · Dec 9, 2004

The Double Slit Experiment Heisenberg Uncertainty Principle I'm looking forward to the next ones <div class="Discussion_UserSignature"> </div>

berna · Dec 25, 2004

In the third release about Quantum Astronomy there is a reference to the complementarity principle. Although it has been widely accepted and supported by many experiments, in a recent issue of New Scientist there is an article about an experiment that contradicts the principle. In a doulbe slit experiment the path of each photon is measured and there is evidence that the inteference pattern is formed anyway. However this does not rule out most of the space.com Seti article's reasoning. I believe that if it would be possible to make an experiment with gravitational lensisng and a far away quasar as a source, the interference would hold and everything would happen as the photon follows both possible ways for billions of years. It should be like this because the distance between possible virtual paths is not important, and is not a parameter in quantum equations, only the length of each path is significant. However I doubt that this experiment is realistically possible as the time difference can be in the range of weeks or even years and it would be difficult to compensate for it with enough accuracy (fraction of a wavelenght)

kmarinas86 · Dec 25, 2004

Your post will get better reception and more intelligent answers if you move it to the Ask the Astronomer forum. http://uplink.space.com/postlist.php?Cat=&Board=sciastro

mugsy69 · Sep 29, 2005

From November 11th, 2004 to January 13th 2005, Laurance R. Doyle wrote a 4-article series about Quantum Astronomy. The links are: http://www.space.com/searchforlife/quantum_astronomy_041111.html http://www.space.com/searchforlife/quantum_astronomy_041118.html http://www.space.com/searchforlife/quantum_astronomy_041216.html http://www.space.com/searchforlife/quantum_astronomy_050113.html In this thought provoking series he explains the basis for a "Cosmic-Scale Double-Slit Experiment" which he intended to perform using the Allen Telescope Array and the narrow-band radio-wave detectors being built by the SETI Institute and the University of California, Berkeley. My questions: Have there been any results to this experiment? Or have they not completed it yet? If thess questions have been posted previously, then I apologize; however, I searched the boards and could find nothing. Reading this was like getting to the end of a great book and realizing that the last (and most important) chapter has been removed!

Saiph · Sep 30, 2005

I've heard nothing about it. You may want to check the NASA ADS site, it's got astronomy articles and abstracts from the journals on it. This result, if it's out, may be to recent for public viewing. If you can access via a local university's computer, you should be able to gain access to the more recent papers (universities tend to have a subscription for their network). If you don't have access to such computers, or the restriction is still there, I'll do a quick check from my campus. <div class="Discussion_UserSignature"> --------------------SaiphMOD@gmail.com -------------------"This is my Timey Wimey Detector. Goes "bing" when there's stuff. It also fries eggs at 30 paces, wether you want it to or not actually. I've learned to stay away from hens: It's not pretty when they blow" -- The Tenth Doctor, "Blink" </div>

newtonian · Sep 30, 2005

Mugsy69 - I do not even know what quantum astronomy is! And I am far too busy with Katrina relief to study all of that right now. Is there any way, while waiting for the answer to your question, you could summarize what you have learned from these links concerning quantum astronomy? Saiph - ditto - can you post a few simple basics in this field? Meanwhile - I was wondering if we could one day have dark energy telescopes so as to view our universe (and perhaps other universes) at some time in the not too distanct future - imagine "seeing" beyond our visibility horizon! Assuming, of course, that dark energy can influence FTL (faster than light). Segwaying back to thread theme: dark energy could, in part at least, be caused by quantum effects. Or by the probably related properties of space during time.

mugsy69 · Sep 30, 2005

Unfortunately, no I don't have access to any University computers. Saiph, if you have the time to search then please do. Otherwise, I will post if I find out something.

Saiph · Sep 30, 2005

I'll take a look today when I get a chance. <div class="Discussion_UserSignature"> --------------------SaiphMOD@gmail.com -------------------"This is my Timey Wimey Detector. Goes "bing" when there's stuff. It also fries eggs at 30 paces, wether you want it to or not actually. I've learned to stay away from hens: It's not pretty when they blow" -- The Tenth Doctor, "Blink" </div>

Saiph · Sep 30, 2005

Newtonian: The concept is basically doing quantum experiments, but using astronomical bodies. Such as youngs double slit experiment, where you try to determine of light is a wave, or a particle. Use a galaxy that is lensing another into two seperate parts, and you've got your two slits. Basically it should extend the wierdness of a photon "knowing" how to behave over billions of years between emission and detection. <div class="Discussion_UserSignature"> --------------------SaiphMOD@gmail.com -------------------"This is my Timey Wimey Detector. Goes "bing" when there's stuff. It also fries eggs at 30 paces, wether you want it to or not actually. I've learned to stay away from hens: It's not pretty when they blow" -- The Tenth Doctor, "Blink" </div>

newtonian · Sep 30, 2005

Saiph - Woof! I.e. - fascinating, amazing, all that. Yes, please post what you dig up. I hope to research this myself, but I'm almost out of time today!

Saiph · Sep 30, 2005

Not finding much. There's been a man-made experiment using large radio facilites to broadcast signals out to the WIND instrument. They observed the expected interference results out to a distance of 25 earth radii. Laurence R. Doyle has yet to publish a paper on that experiment (doesn't mean he isn't doing it, going to do it, or hasn't done it already though). <div class="Discussion_UserSignature"> --------------------SaiphMOD@gmail.com -------------------"This is my Timey Wimey Detector. Goes "bing" when there's stuff. It also fries eggs at 30 paces, wether you want it to or not actually. I've learned to stay away from hens: It's not pretty when they blow" -- The Tenth Doctor, "Blink" </div>

newtonian · Sep 30, 2005

Saiph - That's OK. This is an exciting time for astronomy - we are learning so much! Ah, the anticipation of discovery! I guess I'll have to be patient! OK, meanwhile - what were the expected interference results? Are you referring to gravitational lensing?

Saiph · Sep 30, 2005

no gravitational lensing I saw in the abstract. They used two large radio antenae to broadcast a signal, and a space satellite to monitor them, as it sweeps past in orbit. The setup was analogous to the double-slit experiment, except the distance between the sources, and the detector was 25 earth radii. In the experiment, when both slits are open, you get an inteference pattern. This pattern showed the expected 30 km width of the fringes. <div class="Discussion_UserSignature"> --------------------SaiphMOD@gmail.com -------------------"This is my Timey Wimey Detector. Goes "bing" when there's stuff. It also fries eggs at 30 paces, wether you want it to or not actually. I've learned to stay away from hens: It's not pretty when they blow" -- The Tenth Doctor, "Blink" </div>

mugsy69 · Oct 3, 2005

Thanks for the updates, Saiph. I have been too busy to look hard, but in the small amount of time I do have I was still unable to come up with anything. I'll continue to keep my eyes pealed and post if/when something comes up.

electronman · Oct 10, 2005

From November 11th, 2004 to January 13th 2005, Laurance R. Doyle wrote a 4-article series about Quantum Astronomy. The links are: http://www.space.com/searchforlife/quantum_astronomy_041111.html http://www.space.com/searchforlife/quantum_astronomy_041118.html http://www.space.com/searchforlife/quantum_astronomy_041216.html http://www.space.com/searchforlife/quantum_astronomy_050113.html I took the liberty to paste the articles. The articles by L. Doyle is of great interest to me too. This could be another way to view the coming of subatomic particles as oppose to observing the collision of particles in an accelerator if you will. Since I recall a photon can come from 2 or more combination of subatomic particles. Or it maybe a way to see or think things before there is something. In other words events before time is zero. Sorry I don't sound scientific. If there is a way to know were or if he has other writings or writings of his colligues that we can learn from. Please share it. I am still chewing as you put it the ramifications of the proposed experiment. I find it mind boggling indeed. Not to take away any credit but I thought to mention that we may possibly understand why things in the telescope maybe out of focus?

Quantum Astronomy

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