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| Google claims to have reached quantum supremacy |
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| RoGeorge:
You need to read about quantum gates first. Without understanding what each gate does, there is no chance to understand a quantum schematic (AKA quantum algorithm). You don't need to learn all types shown by Quark, but at least CNOT (Controlled NOT), Hadamard and Pauli gates, the ones from the 3rd group in the upper toolbar, named "Half Turns". Probably the most simple circuit is to entangle two qubits, that would be a circuit with 2 gates, a Hadamard and a CNOT gate. To understand quantum gates, at some point you will need to understand the bra-ket notation, probably it might require some linear algebra (arrays) with complex numbers, too. Also, some basic notions about probabilities (most of the quantum algorithm does not return the result after a single run, like a classic algorithm returns, quantum algorithms are usually run hundreds and hundreds of times, and the results are "read" as a statistics of all the runs). There are all kind of tutorials online. See which one suits you better. Anyway, the whole process won't be something you can learn in a weekend. It will take longer than that. Most productive way will be to search for some free online classes from a university, there are many. See if this one suits you: "Quantum computing for the determined" https://www.youtube.com/playlist?list=PL1826E60FD05B44E4 which are Quantum Computing 101 Lessons by Michael Nielsen https://www.youtube.com/user/mnielsencourses Another path to learn will be to start with quantum mechanics and then go into quantum computing. It depends if you are more inclined to math or to physics. |
| RoGeorge:
--- Quote from: rfeecs on September 20, 2019, 10:44:39 pm ---https://www.technologyreview.com/f/614416/google-researchers-have-reportedly-achieved-quantum-supremacy/ From the FT article: --- Quote ---Google claims to have built the first quantum computer that can carry out calculations beyond the ability of today’s most powerful supercomputers, a landmark moment that has been hotly anticipated by researchers. A paper by Google’s researchers seen by the FT, that was briefly posted earlier this week on a Nasa website before being removed, claimed that their processor was able to perform a calculation in three minutes and 20 seconds that would take today’s most advanced classical computer, known as Summit, approximately 10,000 years. The researchers said this meant the “quantum supremacy”, when quantum computers carry out calculations that had previously been impossible, had been achieved. --- End quote --- --- End quote --- Chinese quantum computer just upped the bar from 53...54 qubits (Google's Sycamore) to 56...66 qubits (Zuchongzhi). Not very sure how the qubits are counted, it varies. ::) Report: https://phys.org/news/2021-07-chinese-milestone-qubit.html Abstract: https://arxiv.org/abs/2106.14734 Paper: https://arxiv.org/pdf/2106.14734.pdf |
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