Lasers. Very cool and exciting toys. They have also revolutionized science and technology. Through a comparatively simple process, photons are bounced backward and forward within an optical cavity. Stimulated emission from the quantum states of the material within the cavity causes more and more photons to be generated. Eventually a threshold is reached and laser emission results, producing a collimated beam of a defined wavelength.
So where do black holes come into all this? Well, it is theorized that black hole event horizons produce radiation. Hawking radiation, although not yet proven, is probably responsible for the only emission from a black hole. It may even cause the black hole to evaporate. But what if this radiation could be used in the ultimate laser cavity? Some Scottish researchers think it might be possible… in theory…
Yes it sounds ridiculous when we read: “Synthetic Black Hole Event Horizon Created in UK Laboratory” (ahem, one of mine!), but it isn’t that far from reality. Drawing the reader’s attention to the word “synthetic”, we are obviously not talking about a real, bona fide black hole sitting on a desk in some professors lab causing all sorts of havoc to the space-time in some university campus! We are referring to a black hole “analogue”, or more precisely an event horizon analogue.
In science terms an analogue is used to simulate a “thing” far more complex but demonstrates the physics behind that “thing” accurately all the same. Looking at the simulated Mars missions, we currently have a “Mars base”, the Mars Desert Research Station (MDRS) running in the Utah Desert, where a group of people get sealed away from the rest of the world for months on end. All in the hope to simulate what it is like to live on Mars. This is commonly known as a Mars habitat analogue.
Black hole or event horizon analogues aren’t for people to live in. In the case of the laser experiment I mention in the above article, the event horizon is simulated when two pulses of laser light of two different wavelengths are fired through an optical material. The first travels slowly, the second faster. As the first laser changes the properties of the optical material behind it, the second laser pulse is slowed down. The second pulse can never overtake the first pulse; it is effectively slowed to a stop (relative to the first pulse).
Sound familiar? This is a basic simulation of how an event horizon works as light tries to escape a black hole – it can’t. Hey presto! We have a simulated black hole, or as I’d put it, a “synthetic black hole”.
So, experiments are being carried out on laser light to see how the event horizon within an optical material acts. Could it be possible to demonstrate things like Hawking radiation? Could particles, or photons for that matter, appear to jump out of the leading edge of the horizon? I’m not totally convinced this can be proven, but then again the mathematics may prove otherwise.
OK, so there might be a possibility that an event horizon could be demonstrated in the laboratory using lasers as a method to simulate a black hole. Turning this idea around, could event horizons and our good friend Hawking radiation combine to create a type of laser emission itself?
I’ve been grappling with this publication by Ulf Leonhardt and Thomas Philbin (“Black Hole Lasers Revisited”) in a research group in St. Andrews University, Scotland, for a few days now. The more I read it, the more amazed I get. But I also become more confused, the theoretical physics behind the concept of a “black hole laser” is, as you’d expect, top drawer. While I’ve been compelled to write about it, I’ve been reluctant as it is tough to digest. I’m going to give a very rough rundown about some of the conclusions. If you’re feeling brave, dive in, a preprint is waiting for you on arXiv…
Using a Bose-Einstein condensate, a rather exotic substance itself, sonic waves could be generated to simulate an event horizon. Where one horizon is apparently pretty useless for laser generation, two horizons, side by side actually turns out to be fairly useful. In this case, a black hole horizon and a white hole horizon are required. A white hole is very similar to a black hole (i.e. in cosmology, they will both have the same gravitational influence on matter – matter is attracted – and will therefore be indistinguishable to observers), but there are some very subtle differences at the event horizons of both.
In this analogue substance, sonic waves that travel across the white hole horizon will have a negative and positive frequency component. After some blue shifting and red shifting (increase in frequency and decrease in frequency, respectively) on each “bounce” between horizons, the product waves will have greatly increased in amplitude. In fact, theoretically, the process is exponential, simulating stimulated production of waves, similar to a laser process.
The big thing to come out of this paper is that it is not advocating bouncing radiation between a cosmological black and white hole (if you think you know how this might be done, I’d love to get your theory in the comment section below), nor is it suggesting stimulated generation of Hawking radiation from an actual black hole event horizon, it is using a theoretical model for a possible situation. Sonic wave production in a Bose-Einstein condensate perhaps isn’t that far out of the realms of possibility, using such an analogue may even prove or disprove the existence of Hawking radiation without even looking into the horizon of a stellar black hole…
323 thoughts on “How do you Build a Laser with a Black Hole?”
verry interesting. but i thing icant try this at home..
coz must be expensip
sablon kaos satuan
Hey it’s really cool.
Thank you for post about thisone.
Really Love about this topic. Thumbups for it.
anyway ….. do you want get unbelievable discounts for the most wanted products?
Come here http://kcpatelandcompany.com
Bartz Klauser thumber http://wallpaperfinalfantasy.com
Laser is great matterial for all purpose
Agree, but this post so infomational
nice friends, I like that,,,,
all peace begins with the will to understand and transcend the
inexplicable misery of being alive with the capacity of power conscious .
I needed to draft you this very small word so as to give many thanks over again for the splendid thoughts you have discussed in this case. It is open-handed of people like you to convey unhampered all that some people would have made available for an
senior pictures ideas
wow.. thx very much for the posting..
i’m very need this… duniaGOMBAL
Hello Ian O’Neill that is a very smart block. Till now I was unware about how to build a laser with a black hole.
yeah…like it… wooden handicraft
Beats By Dre
By Dre Beats
Black hole lasers as a concept is pretty interesting though it bears
questioning.. what practical application can be garnered from this other
than bragging rights from scientist conventions? Anyways great article,
though I don’t understand the physics of it.
Very interesting. I was not award you could do this.
wow that is veri amazing..
i wanna try this at home…
Wow, I didn’t know that you could do that. That is so cool for those that enjoy that sort of thing. best domain registrar
This document was
specifically what I was trying to find.
Thanks for this article, it essentially assisted me quite a lot and
saved me loads of time.
a wonderfull post about the laser theory
thanks for your article..
i need print this article.. thanks
this is quite difficult, but i am sure all can do it by following instruction above
I was not good in chemistry or physics
well so do not ask much of my commentary DONE
only that the final application the bone resulting produto is beneficial to mankind. como bajar de peso
This is pretty neat stuff.
Definitely consider that that you stated. Your favourite reason
appeared to be on the internet the simplest factor to take into account of. I
say to you, I definitely get irked whilst other people consider issues that
they plainly do not recognise about. You managed to hit the nail upon the
highest and also defined out the entire thing with no need side-effects ,
people could take a signal. Will probably be again to get more. Thank you!Realy
good forum that helped me alot is : http://digitalstockexchange.info
beats dr dre
Beats By Dre
Dr Dre beats
Dre Beats headphones
beats by dre studio
beats by dre solo
beats by dre pro
beats dr dre
Beats By Dre
Dr Dre beats
Dre Beats headphones
You completed several nice points there.
I did a search on the subject matter and
found a good number of persons will have the same opinion with your blog.
make a laser with a black hole ???
Thanks for sharing this nice blog, i am really appreciate for this blog. Good point you made there.
Every time God made an error while creating the Universe
and divided by zero a black hole was created. I though everybody knew
that…Is he also use laser for that? 😛
really a cool and interesting as well as informative post…
Considering “professional” means any player that is PAID to play hockey, he has a good chance to get in a league if the talent level is there. If he hasnt played high school or college hockey, then his chances are very slim to get a chance at making a team.generic viagara
really i don’t know what is formula about. MAybe any formula the other which i can knew please. Newest gadgets
haven’t yet read about your formula before.so, i enjoyed the analysis and explanation very much. thanks for sharing
I know it’s all in the name of science but think of all the starving people on this planet…$1.6 billion would go a very long way to helping them out instead of spending that kind of coin poking holes in space to find out something we ‘don’t really need to know’ but ‘want to know’.
Is it just me or does anyone else smell some ramifications coming along with this ‘adventure’, what if we start or create something we can’t possibly put an end too, or as mentioned earlier, what if we let something in that we don’t want here…think about it is all I’m saying.
Ripping a hole in the fabric of space-time? Gee, what could POSSIBLY go wrong?
Thanks fo share…Its useful for me..
Waw,, amazing it’s..Thank you for shared.. Antique Mahogany FurnitureKumpulan Tips dan TrickNewest Gadgets
Cool, It made me laugh again.(Kidding).
But according to whatsoever theories, is it possible??
Check Out my Blog
cream to tighten vagina
I am glad to read this post, its an interesting one. I am always searching for quality posts and articles and this is what I found here, I hope you will be adding more in future Kata Kata Bijak.
This is a smart blog. I mean it. You have so much knowledge about this issue, and so much passion. You also know how to make people rally behind it, obviously from the responses. You’ve got a design here that’s not too flashy, but makes a statement as big as what you’re saying. Great job, indeed.
nice post 🙂 Waptrick
I wish I could live in a black hole!
There are so many people like your bolg, so many views from
they, they said is what i want to say, thank you share this article, I am very
agree your view
I believe you’re British so I’m translating prices into British pounds. I’m also going to assume that if you’re having a weekend in Paris with your boyfriend that I should read that as “a romantic weekend
I enjoyed reading your article and found it to be
informative and to the point. Thank you for not rambling on and on just to fill
nice to hear that Ventura Disc Golf running on scoop. Great new, events, tips,
and reviews will get soon. I hope you finished the polishing this new website.
Keep it up you great work scoops.
Really a work of art presented by
the blogger. Keep it up.
Government would be interested in this and will try to take control I guess.
They already know too much about us and do we need more exposure at all? tenaga surya tenaga surya
Good to know that this topic is being covered also in this
website & there are a lot of developers working on this segment but this is
one of the best innovative ideas ever seen.
he blackhole gives off the radiation when it obsorbs one of the particles described in the article. You can even learn about them on the Discovery Channel. Random particles exist, and appear and disappear, in the “vacuum” of space all the time, constantly. When a set of particles, anti- to the other come in contact, they destroy each other into non-existence.Around blackholes, when these particle pairs appear and one gets sucked in at the even horizon and the other is JUST far enough out to escape, it radiates off into space.That’s the idea. The experiment here just uses light.