Quantum 101 Episode 7: Quantum Computing Explained
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- Опубліковано 11 тра 2024
- It's amazing what computers can do just by flipping bits back and forth from one state to the other. But what if that's not enough?
What if we take computers and make them quantum? Up until now, we've made computers faster by giving them more memory and more processors. It's like filling a giant warehouse with more and more workers, each of whom can only do one task at a time.
Quantum computing is like tearing down the warehouse and building a new one. In the new Quantum warehouse, each worker is a multitasker capable of not just flipping bits on or off, but holding them in carefully suspended, indeterminate states while coordinating instantaneously with one another.
This video discusses how quantum computing can change the world, and how it presents challenges we haven’t even begun to imagine.
Join Katie Mack, Perimeter Institute’s Hawking Chair in Cosmology and Science Communication, over 10 short forays into the weird, wonderful world of quantum science. Episodes are published weekly, subscribe to our channel so you don’t miss an update.
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The "But quantum encryption will solve the security issue" never sat quite right with me.
Because that would require all devices to have the required hardware to handle it.
All while the current encryption can, as mentioned in this video, be broken in hours or even seconds by a single quantum computer.
This leaves us with a huge gap that needs several technical generations or 10+ years to be closed again.
The first quantum computers that are able to break rsa, will throw us into a decade of "no secure and/or trustworthy encryption available".
unless the same computers that can decrypt rsa (based on quantum computing) can also provide a more complex encryption, that is, if I find a method to decrypt rsa it can tell me something about how to encrypt more efficiently.
This short series is amazing.
I think we should apply the accuracy test to claims about quantum computing. Ask the designers “if you program the quantum computer to add 3 and 4, what is the probability that you will get the answer 7?”
This highlights the fact that quantum computers will only be useful in a very limited number of probabilistic problems.
I am also sceptical about using quantum computers to crack encryption. As an example ask the quantum computer to find the prime factors of 233. Then show me the software!
Richard
more precisely, quantum computers will be used to solve problems in which it is worth taking advantage of the superposition postulate to make calculations faster than 1 in 1. Not all problems require taking advantage of superposition to be solved in a reasonable time.
@@pedrosuarez544 Hi Pedro. This idea of quantum superposition is very compelling but it does lead to ideas of particles being in two places and the same time and cats being alive and dead. I would like to cut through the confusion of quantum theory and simply state that "a system is in one unique state at any point in time".
Although the maths of quantum theory is heavily based on the idea of quantum superposition, I don't consider it to be a real physical fact. For example, when trying to explain superposition, physicists will often refer to the superposition of spin states spin up and spin down (all this without clearly defining what is spin). I prefer a wave approach to the concept of spin as explained in this video:
ua-cam.com/video/zEu-_0ACl3I/v-deo.htmlsi=vVIgKXkhCi6i4U6F
I am not sure what this will mean for quantum computing but it seems to me that the best we can hope for is to compute outcomes which are a direct analogue of entangled Qubits which require a probabilistic answer with defined accuracy.
Richard
“Champing at the Qbit…” 😂
Intension Is Everything.❤
Knowing this gives me a quantum of solace
Quantum computing will completely change the computing landscape. All current cryptography is vulnerable, and that would extend to things like Cryptocurrency, Banking, Securing Trade Secrets, and a whoooooooole lot of other things. As things stand, we are not prepared for Quantum Computers' impact on society.
Bad actors will have access to unimaginable horrors.
This is Y2K all over again. Engineers are already starting to adapt quantum-proof encryption methods. Nothing like that is going to happen.
@@emmanueldolderer1225 I don’t agree but you present a very reasonable possibility. In this case I think technology is moving faster on the QC side than the hardening of current gen technology is. Mostly because $$$.
@@Luunchb0xxx well, we already have encryptions developed that can withstand quantum computers, literally. Google is implementing them right now into their systems, the rest of companies will follow suit very soon. Bad actors utilizing quantum computers in the future can't compete against the fact that we literally already know what to do against them and are implementing these countermeasures at this very moment.
@@emmanueldolderer1225 I hope you’re right! Thing that concerns me about quantum resistant encryption is that we can’t test it thoroughly. Coupled with slow adoption of this type of encryption we could be looking at some problems. I’ve worked in IT for a long time and the unfortunate reality is that there’s still a lot of old stuff in the field - this is what worries me about the transition to Quantum, so much legacy stuff out there to be vulnerable. Y2K was a non event because of the hard work of lots of people and we had an easy to measure drop dead date. We don’t have quite as much work going on at a functional level (yet) and no real way to measure success in terms of what constitutes a useful quantum computer. Again I hope I’m wrong but it doesn’t feel good to me right now.
Wow, this video was very interesting and informative, and the production quality was really good. I am excited to learn more about quantum computing!
Thank you.
Someone once wrote a story about an answer given by a very large computer - to which no one actually knew the question. Why does this story keep coming to my mind when ever someone talks about quantum computing?
Douglas Adams - The Hitchhiker's Guide to the Galaxy
If you are referring to the legend, at least say his name
So no information is safe as it stands now... What will security look like in the future
Welcome to the f....verse, where everyone is neither dead nor alive and both at the same time. Lol
Is she the actress that says "one time at band camp"
I still have no clue.............
And when a Quantum computer meets AI..........
Neat. Yes, cryptocurrency run through quantum computing could be interesting. Imagine if string theory could inform peoples economic goals and approaches. People would need to become accustomed to quantum reality, though. Its ironic because this already is the quantum reality. More like being able to understand that the observer is the observed and take it from there. As opposed to its a 0 or a 1 because of a combination of 0’s and 1’s. Its cool to hear from a young physicist on this matter. Its an exciting time because such a physicist now has creative room to explore within intersectional fields when it comes to quantum computing.
Both 😂
Not easy. Good effort, please try harder 😁
Thanks anyway.
Poor quality comment. Good effort, please try harder. Thanks anyway.