OT: Distinguishable angular momentum in radio photons?
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The May 2012 issue of the IEEE Spectrum magazine reports that researchers in
Italy and Sweden were able to conduct two separate instances of radio communication on the exact same frequency, without increasing bandwidth, and without time-division multiplexing, be making the transmissions differ in angular momentum. One transmission used linear polarization, and the other was given angular momentum by means of a dish with a radial cut, where the metal was bent backwards/forwards on the two sides of the cut. Apparently this is not just a case of linear vs circular polarization, as circular polarization can be readily picked up by a linearly polarized antenna, and apparently the two channels did not interfere with each other. The researchers claim that this demonstration points to the possibility that the radio photons can be given multiple, quanized levels of angular momentum, making possible several more communication channels without increased bandwidth. Other researchers say that this is just a form of MIMO. Wikipedia describes MIMO as the technique of using multiple antennas as in diversity reception or in gain increases obtained by phasing the antennas. My apologies if this is too far OT. 73, Erik K7TV ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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Oh, and the first thing I looked at was whether it was in the April issue.
It was not. Maybe the IEEE got it from another publication's April issue? -----Original Message----- From: [hidden email] [mailto:[hidden email]] On Behalf Of Erik Basilier Sent: Thursday, May 03, 2012 10:10 PM To: [hidden email] Subject: [Elecraft] OT: Distinguishable angular momentum in radio photons? The May 2012 issue of the IEEE Spectrum magazine reports that researchers in Italy and Sweden were able to conduct two separate instances of radio communication on the exact same frequency, without increasing bandwidth, and without time-division multiplexing, be making the transmissions differ in angular momentum. One transmission used linear polarization, and the other was given angular momentum by means of a dish with a radial cut, where the metal was bent backwards/forwards on the two sides of the cut. Apparently this is not just a case of linear vs circular polarization, as circular polarization can be readily picked up by a linearly polarized antenna, and apparently the two channels did not interfere with each other. The researchers claim that this demonstration points to the possibility that the radio photons can be given multiple, quanized levels of angular momentum, making possible several more communication channels without increased bandwidth. Other researchers say that this is just a form of MIMO. Wikipedia describes MIMO as the technique of using multiple antennas as in diversity reception or in gain increases obtained by phasing the antennas. My apologies if this is too far OT. 73, Erik K7TV ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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Paul, N6PSE, reported on the rigs used at the Yemen, 7O6T, DXPedition now in progress. A number of people have emailed me about the rigs/amps at 7O6T. We have six K3's and one TS-590. We have six Acom 1010 Amps. We have a THP spare Amp. The K3's are simply amazing! Paul N6PSE Bob K6UJ ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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On Fri, May 4, 2012 at 9:28 AM, Bob K6UJ <[hidden email]> wrote:
> > Paul, N6PSE, reported on the rigs used at the Yemen, 7O6T, DXPedition... ================ The ops on this expedition are among the very best in the world, as you can prove to yourself by listening to the masterful way they handle the piles and the tremendous run rate they achieve. Their bios are on the expedition's page at: http://www.yemen2012.com/team.php and as you can see, as a group they have been on literally hundreds of DXpeditions. Their choice of the K3 for their operating rigs kinda sez it all. And BTW the proof that the K3 can do the job is reflected in their consistent ability to (within seconds!) pick out a single call from the seething mass with few repeats necessary. Tony KT0NY -- http://www.isb.edu/faculty/facultydir.aspx?ddlFaculty=352 ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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In reply to this post by Bob K6UJ
With those great rigs and their ability to operate 6m JT65A so well, I sure wish they
would try to get on 6m during their moonset....the best week of the month for 6m EME, and no word at all from them about that :-( VY 73, Lance On 5/4/2012 2:28 PM, Bob K6UJ wrote: > Paul, N6PSE, reported on the rigs used at the Yemen, 7O6T, DXPedition now in progress. > > > A number of people have emailed me about the rigs/amps at 7O6T. > > We have six K3's and one TS-590. We have six Acom 1010 Amps. > > We have a THP spare Amp. The K3's are simply amazing! > > > Paul N6PSE > > > > Bob > K6UJ > > > > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > -- Lance Collister, W7GJ (ex WA3GPL, WA1JXN, WA1JXN/C6A, ZF2OC/ZF8, E51SIX, 3D2LR, 5W0GJ) P.O. Box 73 Frenchtown, MT 59834-0073 USA TEL: (406) 626-5728 QTH: DN27ub URL: http://www.bigskyspaces.com/w7gj Windows Messenger: [hidden email] Skype: lanceW7GJ 2m DXCC #11/6m DXCC #815 Interested in 6m EME? Ask me about subscribing to the Magic Band EME email group, or just fill in the request box at the bottom of my web page (above)! ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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In reply to this post by Tony Estep
On 5/4/2012 7:51 AM, Tony Estep wrote:
> The ops on this expedition are among the very best in the world, as you can > prove to yourself by listening to the masterful way they handle the piles > and the tremendous run rate they achieve. Thanks to their location 9,000 miles from me with a beam heading of 2.4 degrees (through the aurora), a QSO requires great propagation, great antennas, and great ops on both ends, you've got to be there during the hour or so each day when there's propagation on any given band, AND you've got to get through the wall of east coast stations who are 20 dB stronger and the EU stations who are 30 dB stronger. Every time I've heard this team there's been a great operator at the other end. I've managed to work them twice, on 17M CW and 20M CW. So far, the only time I've not heard them on SSB well enough to call was for a half hour on 15M, and the op was working JA (and making great rate). By the time he listened for US, propagation was gone. 73, Jim K9YC ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
Re: OT: Distinguishable angular momentum in radio photons?
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In reply to this post by K7TV
On 05/03/2012 10:10 PM, Erik Basilier wrote:
> The May 2012 issue of the IEEE Spectrum magazine reports that researchers in > Italy and Sweden were able to conduct two separate instances of radio > communication on the exact same frequency, without increasing bandwidth, and > without time-division multiplexing, be making the transmissions differ in > angular momentum. One transmission used linear polarization, and the other > was given angular momentum by means of a dish with a radial cut, where the > metal was bent backwards/forwards on the two sides of the cut. Apparently > this is not just a case of linear vs circular polarization, as circular > polarization can be readily picked up by a linearly polarized antenna, and > apparently the two channels did not interfere with each other. The > researchers claim that this demonstration points to the possibility that the > radio photons can be given multiple, quanized levels of angular momentum, > making possible several more communication channels without increased > bandwidth. Other researchers say that this is just a form of MIMO. Wikipedia > describes MIMO as the technique of using multiple antennas as in diversity > reception or in gain increases obtained by phasing the antennas. > = 1). This can have two projections, +1 and -1 (only two, unlike for most spin one particles, which have three possible projections). However, these two projections are directly related to the left and right circularly polarized light, so I cannot quite see what other source of angular momentum could arise in this case? Having said this, I don't quite believe in the Swedish group explanation of this experiment. Jussi Eloranta AA6KJ ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
Re: OT: Distinguishable angular momentum in radio photons?
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I read a fairly comprehensive debunking of this some weeks/months ago, I
just wish I could remember where I read it, it might have been in one of the physics publications I take at work, now probably buried under mounds of other stuff! I seem to recall that it picked up on pretty much the same points as Jussi has written. If I can find the source, I will post a link to it. 73 Stephen G4SJP On 4 May 2012 20:02, Jussi Eloranta <[hidden email]> wrote: > On 05/03/2012 10:10 PM, Erik Basilier wrote: > > The May 2012 issue of the IEEE Spectrum magazine reports that > researchers in > > Italy and Sweden were able to conduct two separate instances of radio > > communication on the exact same frequency, without increasing bandwidth, > and > > without time-division multiplexing, be making the transmissions differ in > > angular momentum. One transmission used linear polarization, and the > other > > was given angular momentum by means of a dish with a radial cut, where > the > > metal was bent backwards/forwards on the two sides of the cut. > Apparently > > this is not just a case of linear vs circular polarization, as circular > > polarization can be readily picked up by a linearly polarized antenna, > and > > apparently the two channels did not interfere with each other. The > > researchers claim that this demonstration points to the possibility that > the > > radio photons can be given multiple, quanized levels of angular momentum, > > making possible several more communication channels without increased > > bandwidth. Other researchers say that this is just a form of MIMO. > Wikipedia > > describes MIMO as the technique of using multiple antennas as in > diversity > > reception or in gain increases obtained by phasing the antennas. > > > The only source of angular momentum in a photon is its intrinsic spin ( > = 1). This can have two projections, +1 and -1 (only two, unlike for > most spin one particles, which have three possible projections). > However, these two projections are directly related to the left and > right circularly polarized light, so I cannot quite see what other > source of angular momentum could arise in this case? Having said this, I > don't quite believe in the Swedish group explanation of this experiment. > > Jussi Eloranta > AA6KJ > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
Re: OT: Distinguishable angular momentum in radio photons?
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The C-band satellite has 2 channels on each frequency - I can't recall
if one was horizontally polarized and th other vertical or whether one used right hand circular and the other left hand. In any case, it works and works quite well. So having 2 non-interfering non-multiplexed streams on one frequency is nothing new. 73, Don W3FPR On 5/4/2012 3:13 PM, Stephen Prior wrote: > I read a fairly comprehensive debunking of this some weeks/months ago, I > just wish I could remember where I read it, it might have been in one of > the physics publications I take at work, now probably buried under mounds > of other stuff! > > I seem to recall that it picked up on pretty much the same points as Jussi > has written. > If I can find the source, I will post a link to it. > > 73 Stephen G4SJP > Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
Re: OT: Distinguishable angular momentum in radio photons?
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In reply to this post by Stephen G4SJP
This is the debunking saying that this is more or less a special case of MIMO - Multiple Input Multiple Output - communications, i.e. using multiple antennas on the rx and tx sides:
"Is orbital angular momentum (OAM) based radio communication an unexploited area?" Ove Edfors and Anders J Johansson, IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, 2012 http://www.lunduniversity.lu.se/o.o.i.s?id=12683&postid=2062936 Abstract: "We compare the technique of using the orbital angular momentum (OAM) of radio waves for generating multiple channels in a radio communication scenario with traditional multiple-in-multiple-out (MIMO) communication methods. We demonstrate that, for certain array configurations in free space, traditional MIMO theory leads to eigen-modes identical to the OAM states. From this we conclude that communicating over the sub-channels given by OAM states is a subset of the solutions offered by MIMO, and therefore does not offer any additional gains in capacity."
Sverre, LA3ZA
K2 #2198, K3 #3391, LA3ZA Blog: http://la3za.blogspot.com, LA3ZA Unofficial Guide to K2 modifications: http://la3za.blogspot.com/p/la3za-unofficial-guide-to-elecraft-k2.html |
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In reply to this post by K7TV
Contact me if you would like a copy of this 2 page article.
"A New Twist on Radio Waves", IEEE Spectrum, Vol 9 (5), May 2012 /eric, kj7ae |
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In reply to this post by W7GJ, Lance
Thanks very much for the info and the try! GL and VY 73, Lance
On 5/4/2012 4:59 PM, [hidden email] wrote: > Six meters is not permitted in Yemen. > > Paul N6PSE > > > On May 4, 2012, at 8:05, "Lance Collister, W7GJ"<[hidden email]> wrote: > >> With those great rigs and their ability to operate 6m JT65A so well, I sure wish they would try to get on 6m during their moonset....the best week of the month for 6m EME, and no word at all from them about that :-( VY 73, Lance >> >> >> On 5/4/2012 2:28 PM, Bob K6UJ wrote: >>> Paul, N6PSE, reported on the rigs used at the Yemen, 7O6T, DXPedition now in progress. >>> >>> >>> A number of people have emailed me about the rigs/amps at 7O6T. >>> >>> We have six K3's and one TS-590. We have six Acom 1010 Amps. >>> >>> We have a THP spare Amp. The K3's are simply amazing! >>> >>> >>> Paul N6PSE >>> >>> >>> >>> Bob >>> K6UJ >>> >>> >>> >>> >>> ______________________________________________________________ >>> Elecraft mailing list >>> Home: http://mailman.qth.net/mailman/listinfo/elecraft >>> Help: http://mailman.qth.net/mmfaq.htm >>> Post: mailto:[hidden email] >>> >>> This list hosted by: http://www.qsl.net >>> Please help support this email list: http://www.qsl.net/donate.html >>> >> >> -- >> Lance Collister, W7GJ >> (ex WA3GPL, WA1JXN, WA1JXN/C6A, ZF2OC/ZF8, E51SIX, 3D2LR, 5W0GJ) >> P.O. Box 73 >> Frenchtown, MT 59834-0073 >> USA >> TEL: (406) 626-5728 >> QTH: DN27ub >> URL: http://www.bigskyspaces.com/w7gj >> Windows Messenger: [hidden email] >> Skype: lanceW7GJ >> 2m DXCC #11/6m DXCC #815 >> >> Interested in 6m EME? Ask me about subscribing to the Magic Band EME >> email group, or just fill in the request box at the bottom of my web >> page (above)! >> >> -- Lance Collister, W7GJ (ex WA3GPL, WA1JXN, WA1JXN/C6A, ZF2OC/ZF8, E51SIX, 3D2LR, 5W0GJ) P.O. Box 73 Frenchtown, MT 59834-0073 USA TEL: (406) 626-5728 QTH: DN27ub URL: http://www.bigskyspaces.com/w7gj Windows Messenger: [hidden email] Skype: lanceW7GJ 2m DXCC #11/6m DXCC #815 Interested in 6m EME? Ask me about subscribing to the Magic Band EME email group, or just fill in the request box at the bottom of my web page (above)! ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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In reply to this post by erehm
Better yet, it's available free on-line:
http://spectrum.ieee.org/telecom/wireless/a-new-twist-on-radio-waves /eric, kj7ae |
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In reply to this post by Tony Estep
Tony, I actually heard you work them last night (or was it the night before?). Congrats!
John AE5X http://www.ae5x.com/blog all. And BTW the proof that the K3 can do the job is reflected in their consistent ability to (within seconds!) pick out a single call from the seething mass with few repeats necessary. Tony KT0NY ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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On Fri, May 4, 2012 at 5:48 PM, John Harper <[hidden email]> wrote:
> Tony, I actually heard you work them... =========== Why thank you, John. Their K3s have a natural affinity for signals from another K3. Tony KT0NY -- http://www.isb.edu/faculty/facultydir.aspx?ddlFaculty=352 ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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In reply to this post by Bob K6UJ
Are there P3's ? Their operating would leave me to believe there was.
Randy N1KWF On Fri, May 4, 2012 at 10:28 AM, Bob K6UJ <[hidden email]> wrote: > > Paul, N6PSE, reported on the rigs used at the Yemen, 7O6T, DXPedition now > in progress. > > > A number of people have emailed me about the rigs/amps at 7O6T. > > We have six K3's and one TS-590. We have six Acom 1010 Amps. > > We have a THP spare Amp. The K3's are simply amazing! > > > Paul N6PSE > > > > Bob > K6UJ > > > > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > -- Randy Lake N1KWF 73 Gunn Rd. Keene,NH ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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These guys don't need P3s. Every one of the ops on this expedition is a
world class operator. 73, Scott, N9AA On 5/4/12 8:30 PM, Randy Lake wrote: > Are there P3's ? Their operating would leave me to believe there was. > > Randy N1KWF > > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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In reply to this post by erehm
Eric, thanks for posting the link to the original article, and thanks also
to the others who responded to my post. Since nobody complained about the subject, I guess I can make these comments before the thread gets to be too long and too OT. I did get one private email from a list member who felt I was a non-technical person writing about things way beyond my education. Just in case a lot of readers may feel the same way, let me explain to the list. I felt that the startling claims of the article would make for a more interesting conversation topic than some other discussions on the reflector. I related the gist of the article without personally trying to either support or debunk the content. I have a PhD in Physics as well as a Masters in Engineering from long ago, but I would not take myself so seriously as to spend the effort to try to arrive at a personal evaluation of a subject that the active researchers (pro as well as con) spent many hours on. Without the intent of supporting or disproving the claimed results, and after reading the comments (but none of the original work), I make these basic observations: * Radio waves differ from light only by frequency, and are composed of photons if light is understood as composed of photons. * Photons have linear momentum although they don't have any rest mass. They also have two kinds of angular momentum, Spin Angular Momentum (SAM, with only two possible measured values), and Orbital Angular Momentum (OAM, which can have many). * The claim was not just that you can have two independent communications (as possible by means of circular polarization), but more than two. * The claim of multiple levels of angular momentum tells us that it is about OAM and not SAM. The abstract of the debunking research (thanks Sverre for posting) explicitly refers to OAM. * "Debunking" can have multiple meanings. Sometimes it can mean that the information in question is garbage. Sometimes it merely means that the information is not as new as claimed. In this case, the debunking might be of the second type (although I am not deeply enough in the issue to say it is). * Once one goes deep enough in physics, one finds that the "laws of nature" are just "models" that intend to mimic reality, and they are not reality itself. It may turn out that the claims made in this case bring nothing to our understanding, but there is not unusual in science to have situations where two theories explain the same phenomena in very different ways, and where neither theory can be pronounced "incorrect". 73, Erik K7TV -----Original Message----- From: [hidden email] [mailto:[hidden email]] On Behalf Of erehm Sent: Friday, May 04, 2012 1:40 PM To: [hidden email] Subject: Re: [Elecraft] OT: Distinguishable angular momentum in radio photons? Better yet, it's available free on-line: http://spectrum.ieee.org/telecom/wireless/a-new-twist-on-radio-waves /eric, kj7ae -- View this message in context: http://elecraft.365791.n2.nabble.com/OT-Distinguishable-angular-momentum-in- radio-photons-tp7525974p7528611.html Sent from the Elecraft mailing list archive at Nabble.com. ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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In reply to this post by K7TV
Very cool, Erik. There is a lot of astounding discovery taking place right now
in physics. Another extremely weird relatively recent finding is vector potential (VP) radiation, in which communications are conducted not by actual photons but by virtual photons with zero power (the ultimate QRP) and cannot be received with metallic antennas; the antennas used are fluorescent bulbs from camping lanterns! All these secrets of the universe that continue to be discovered. Al W6LX ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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In reply to this post by K7TV
Well said Erik. My credentials do not match yours, but I do have a BS in Physics and made a living for 40 years as an Engineer. The theory may be bunk, but that is what most said about Einstein when he presented the Theory of Relativity. It sounds to me like a theory that is worth per-suing for someone. I don't think it is time to start pestering Wayne and Eric for a KX-31 yet, but inventing a detector for Angular Momentum might be an interesting research project for someone qualified. It is certainly a theory that is worth some minutes or hours of contemplation for me and for Erik as well, probably a lot of others on this august reflector. Theories are always ideas that someone is brave enough to present and risk being called a fool in hope that someone will prove he is a genius.
Willis 'Cookie' Cooke K5EWJ & Trustee N5BPS, USS Cavalla, USS Stewart ________________________________ From: Erik Basilier <[hidden email]> To: [hidden email] Sent: Saturday, May 5, 2012 12:03 AM Subject: Re: [Elecraft] OT: Distinguishable angular momentum in radio photons? Eric, thanks for posting the link to the original article, and thanks also to the others who responded to my post. Since nobody complained about the subject, I guess I can make these comments before the thread gets to be too long and too OT. I did get one private email from a list member who felt I was a non-technical person writing about things way beyond my education. Just in case a lot of readers may feel the same way, let me explain to the list. I felt that the startling claims of the article would make for a more interesting conversation topic than some other discussions on the reflector. I related the gist of the article without personally trying to either support or debunk the content. I have a PhD in Physics as well as a Masters in Engineering from long ago, but I would not take myself so seriously as to spend the effort to try to arrive at a personal evaluation of a subject that the active researchers (pro as well as con) spent many hours on. ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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