An Amplifier That’s Quantum Quiet.

Linear and non linear

An Amplifier That’s Quantum Quiet.

Postby chrismb » Fri Dec 16, 2011 9:21 am

Specifically aimed at quantum computing, but looks interesting generally:

"today’s amplifiers boost ...signals at a cost, sometimes drowning them out with noise from the amplifiers themselves. “Our device adds, at least in principle, the minimum possible amount of noise dictated by the laws of quantum mechanics,” says Massel."


http://spectrum.ieee.org/semiconductors ... ign=121511
chrismb
 
Posts: 620
Joined: Thu Aug 05, 2010 7:32 pm

Re: An Amplifier That’s Quantum Quiet.

Postby Doug Coulter » Fri Dec 16, 2011 10:39 am

I saw this on another science press-release (ugh) board I check regularly. Seems they've invented the parametric amplifier again. I couldn't find out from the non-info in either place whether they are using a different pump frequency or what the nonlinear element was, however. Looks like they have a way to go to get down to single photon work at this point, with a minus 20x SNR.
Posting as just me, not as the forum owner. Everything I say is "in my opinion" and YMMV -- which should go for everyone without saying.
User avatar
Doug Coulter
 
Posts: 2934
Joined: Wed Jul 14, 2010 8:05 pm
Location: Floyd county, VA, USA


Return to Analog

Who is online

Users browsing this forum: No registered users and 1 guest