Re: A Bi-CMOS electronic photonic integrated circuit quantum light detector

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.