Breaking News
News & Analysis

Quantum Entanglement Made Visible

7/24/2013 01:20 PM EDT
12 comments
NO RATINGS
View Comments: Newest First | Oldest First | Threaded View
Page 1 / 2   >   >>
tvhiggins
User Rank
Rookie
Re: Non-Quantum Photon Detector?
tvhiggins   7/30/2013 5:04:06 PM
NO RATINGS
I should probably just read Gisin's experimental work directly, because it's not clear to me from your article exactly how the photon state (or even what state) is being determined.

Your explanation of a classical detector appears to imply the quantum-classical boundary, where quantum decoherence occurs. Perhaps you're describing macroscopic (multi-photon) detection vs. microscopic (single-photon) detection. Using a simple interferometer, for example, one can detect the average polarization state of mulitple photons by simply observing the fringes caused by constructive and destructive interference among the photons.

Nevertheless, any light detector--photodetectors, human eyes, or photographic film--is a quantum detector, by definition, because detection can only be accomplished through quantum absorption (or capture) at the atomic level. It doesn't matter whether it's a single photon or millions of them.

R_Colin_Johnson
User Rank
Blogger
Re: Semantics
R_Colin_Johnson   7/30/2013 4:22:28 PM
NO RATINGS
I doubt it will lead to teleportation as transportation, but here is a YouTube video to watch: 

http://www.youtube.com/watch?v=uNvfpEjxNXQ

R_Colin_Johnson
User Rank
Blogger
Re: Non-Quantum Photon Detector?
R_Colin_Johnson   7/30/2013 4:07:00 PM
NO RATINGS
By entangling thousands of photons simultaneously, they become visible to any classical detector, which includes both photo-detectors and the naked eye.

selinz
User Rank
CEO
Semantics
selinz   7/27/2013 6:15:12 PM
NO RATINGS
Is this simply doping of a direct bandgap material (not so uncommon) or some fancy smancy new thing that will ultimately lead to teleportation, a la Star Trek! Seems like a bit more info would be helpful. Anyone got a link to point to a bit more detail?

DrFPGA
User Rank
Blogger
Re: First Successful Company?
DrFPGA   7/26/2013 1:36:21 PM
NO RATINGS
Thanx for the additional info. Customers are good to have...

R_Colin_Johnson
User Rank
Blogger
Re: First Successful Company?
R_Colin_Johnson   7/26/2013 1:21:31 PM
NO RATINGS
Yes, ID Quantique has customers, although not as many as they would like (the recession hit the financial community just as they were getting started which nixed their original business model, which was to get banks as customers for securing financial transactions). However, they still have more customers that the second successful quantum technology company, D-Wave (which only has Google, NASA and Lockheed).

tvhiggins
User Rank
Rookie
Re: Non-Quantum Photon Detector?
tvhiggins   7/25/2013 3:00:46 PM
NO RATINGS
If "any conventional photodiode" is a "classical" detector, then all photodiode detectors must also be quantum detectors, since they only work through quantum processes. My question remains unanswered: What is a non-quantum detector?

DrFPGA
User Rank
Blogger
First Successful Company?
DrFPGA   7/25/2013 2:51:26 PM
NO RATINGS
I'm not sure what it means for them to be called the 'first successful quantum technology company'?

Do they have sales?

 

R_Colin_Johnson
User Rank
Blogger
Re: Non-Quantum Photon Detector?
R_Colin_Johnson   7/25/2013 2:51:19 PM
NO RATINGS
Any conventional photodiode is a "classical" detector.

steve@ritec
User Rank
Rookie
Re: NG Technology Advancement
steve@ritec   7/24/2013 8:34:00 PM
NO RATINGS
Relax. A few pounds would yield a few billion devices per person.

Page 1 / 2   >   >>
August Cartoon Caption Winner!
August Cartoon Caption Winner!
"All the King's horses and all the KIng's men gave up on Humpty, so they handed the problem off to Engineering."
5 comments
Top Comments of the Week
Like Us on Facebook

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)
EE Times on Twitter
EE Times Twitter Feed
Flash Poll
Radio
NEXT UPCOMING BROADCAST
How to Cope with a Burpy Comet
October 17, 2pm EDT Friday
EE Times Editorial Director Karen Field interviews Andrea Accomazzo, Flight Director for the Rosetta Spacecraft.