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From: Jeroen Belleman <jeroen@nospam.please>
Newsgroups: sci.electronics.design
Subject: Re: A Bi-CMOS electronic photonic integrated circuit quantum light
 detector
Date: Thu, 30 May 2024 13:23:28 +0200
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On 5/30/24 06:56, Jan Panteltje wrote:
> World's smallest quantum light detector on a silicon chip
>   https://www.sciencedaily.com/releases/2024/05/240517164111.htm
> Source:
>   University of Bristol
> Summary:
>   Researchers have made an important breakthrough in scaling quantum technology by integrating the world's tiniest quantum light detector onto a silicon chip.
> 
> Interesting is the circuit, figure 1 in
>   https://www.science.org/doi/10.1126/sciadv.adk6890
> 
> the photo diodes dare used as pull-up and pull down to teh transistor base.
> 
> Quantum talk everywhere,
> but interesting noise cancellation after the beam splitter.
> Anybody knows the basics of this?

The very first word of their abstract has a spelling error. That
doesn't bode well for the rest.

Anyway, it appears the quantum crowd is discovering the advantages
of synchronous detection, as has been used for ages in lock-in
amplifiers. They call it 'homodyne'. OK, fine.

Jeroen Belleman