RE: Are Quantum computers just analog computers under a new name?

Hello,

There is plenty of scientific buzz about quantum computing, but almost no engineering.I’m just old enough to remember the Analog computer (with patch cords and amplifiers) in the back of the of my university electronics lab, with an Intel 8008 in the other.At that time ‘analog’ was coming to an end, and digital computing was coming to the masses with all its new languages and special logic (pascal, algol being new kids on the block to replace the veritable FORTRAN).Now I see that Quantum computing is all the rage, if only someone can get it working, and fathom how to progamme it. However the question remains: “What is the ‘it’ of which we speak?”.

I would posit that what we have a just a new way of interconnecting an ‘analog’ computer, where the ‘feedback’/coding is meant to take the initial random noise, amplify and select the appropriate components, and finally stabilise on some particular bias level that indicates our solution. Hopefully with minimal energy or power consumed by the computation (apart from the cost of running the refrigerator at near 0K).Where is the engineering explanation and conceptualisation of Quantum computing?, and Is it just a new fangled Analog computer?

 

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3 Answers

The only difference i know between analog computers and quantum computers is that quantum computers do not suffer from noise, meaning that they are completely predictable using mathematics and statistics. You cant simulate the noise from the signals taken from a real analog computer instead in an isolated quantum computer signals do not have noise.

quantum computers are more like digital computers, they dont analyze simple systems, the processing parts of most quantum computer designs are complex

Answered on August 8, 2018.

There is a company called QSPICE Labs that is working on the techniques needed to deal with noise in quantum computers.  https://www.qspicelabs.com/

on October 9, 2018.
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