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From: Jan Panteltje <alien@comet.invalid>
Newsgroups: sci.electronics.design
Subject: Re: A Bi-CMOS electronic photonic integrated circuit quantum light
 detector
Date: Thu, 30 May 2024 13:06:15 GMT
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On a sunny day (Thu, 30 May 2024 13:23:28 +0200) it happened Jeroen Belleman
<jeroen@nospam.please> wrote in <v39nfm$1lsdr$1@dont-email.me>:

>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.

OK, that makes sense.Thank you,