Breaking News
Comments
tvhiggins
User Rank
Author
Non-Quantum Photon Detector?
tvhiggins   7/24/2013 1:42:43 PM
NO RATINGS
What is a non-quantum "classical" photon detector? It seems to me that the detection of any photon is a quantum event...unavoidably.

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

tvhiggins
User Rank
Author
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?

R_Colin_Johnson
User Rank
Author
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.

tvhiggins
User Rank
Author
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.

chanj0
User Rank
Author
NG Technology Advancement
chanj0   7/24/2013 7:59:35 PM
NO RATINGS
What caught my eyes is "up to 10 billion super cooled rare-earth ions".


Mining of rare-earth metals seems to be inevitable for the next generation technological advancement. As most people have heard, mining of rare-earth metals causes an exceptional pollution. Any short term solution to the issue? Where else can we dig out more rare-earth metal?

steve@ritec
User Rank
Author
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.

DrFPGA
User Rank
Author
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
Author
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).

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

selinz
User Rank
Author
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?

R_Colin_Johnson
User Rank
Author
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



Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)
Like Us on Facebook
Special Video Section
5G LTE is on the way. These systems will require more ...
Protecting sensitive electronic circuitry from voltage ...
09:45
Watch as a web server authenticates or rejects a water ...
Protecting sensitive electronic circuitry from voltage ...
Watch as a web server authenticates or rejects a water ...
Protecting sensitive electronic circuitry from voltage ...
Power can be a gating factor in success or failure of ...
Get to market faster and connect your next product to the ...
00:44
See how microQSFP is setting a new standard for tomorrow’s ...
The LTC3649 step-down regulator combines key features of a ...
Once the base layer of a design has been taped out, making ...
In this short video we show an LED light demo to ...
The LTC2380-24 is a versatile 24-bit SAR ADC that combines ...
In this short video we show an LED light demo to ...
02:46
Wireless Power enables applications where it is difficult ...
07:41
LEDs are being used in current luxury model automotive ...
With design sizes expected to increase by 5X through 2020, ...
01:48
Linear Technology’s LT8330 and LT8331, two Low Quiescent ...
The quality and reliability of Mill-Max's two-piece ...