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Author Topic:   Article About New Developments in Quantum Mechanics
PaulK
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Posts: 17822
Joined: 01-10-2003
Member Rating: 2.2


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Message 13 of 18 (870646)
01-23-2020 12:27 PM
Reply to: Message 12 by Phat
01-22-2020 5:12 PM


Re: Putting my PNT Here: A Quantum Leap
I know some. There are arguments over just how good Google’s results really are.
The BIG problem is scaling them up. The number of qubits (quantum bits) in a computer is still too low for big problems. The 53 in the Google experiment is high.
But it is good that there are problems. We aren’t ready for the security implications. A lot of widely-used cryptography is vulnerable to these machines - when they get big enough. Work is going on to replace them but it’s taking time - not least because the replacements need to be shown to be secure against normal attacks.

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 Message 12 by Phat, posted 01-22-2020 5:12 PM Phat has seen this message but not replied

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PaulK
Member
Posts: 17822
Joined: 01-10-2003
Member Rating: 2.2


Message 15 of 18 (870655)
01-23-2020 1:07 PM
Reply to: Message 14 by RAZD
01-23-2020 12:59 PM


Re: Search Engine Problems are not the topic
Google’s results in quantum computing are being questioned, notably by IBM
Eg science News (found using DuckDuckGo - my Search Engine of choice)

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 Message 17 by Phat, posted 01-23-2020 6:39 PM PaulK has replied

  
PaulK
Member
Posts: 17822
Joined: 01-10-2003
Member Rating: 2.2


Message 18 of 18 (870728)
01-24-2020 10:19 AM
Reply to: Message 17 by Phat
01-23-2020 6:39 PM


Re: Search Engine Problems are not the topic
quote:
I'm intrigued, but don't really understand encryption technology, to begin with. Frankly, I never have really understood computers except that they were getting faster and better. I will never forget my fascination with calculators and how fat they could solve math problems.
Simple explanation. Some important cryptography is based on hard mathematical problems - that become much easier to solve if you have a big enough quantum computer. For those who want more detail see Shor’s Algorithm. And there’s a lot of detail there.
You don’t need to understand the math, but you do need to understand that quantum computers will allow us to solve problems that would have been impractical to solve before - and we need to base our cryptography on mathematical problems that can’t be practically solved.

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