Quantum Computing

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Quantum Computing

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Quantum-computing startup Rigetti to offer modular processors
Rigetti will build its machines from smaller parts instead of a monolithic chip.
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Rigetti's computers rely on a technology called a "transmon," which is based on a superconducting wire loop linked to a resonator. It's the same qubit technology used by large competitors like Google and IBM. The state of one transmon can influence that of its neighbors during calculations, an essential feature of quantum computing. To an extent, the topology of connections among transmon qubits is a key contributor to the machine's computational power.
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As a startup, Rigetti doesn't have access to the sort of resources available to companies like IBM. And while Rigetti has done an impressive job of fabricating its own transmon processors, it has still lagged behind its larger competitors. The qubit count in IBM's latest processors is over 60, while Rigetti's latest is 31.
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https://arstechnica.com/science/2021/06 ... rocessors/
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Re: Quantum Computing

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China claims to have taken the lead in the quantum race with 66-qubits processor
World's fastest quantum processor?

Chinese researchers of the University of Science and Technology of China have created the world's fastest quantum processor, the Zuchongzhi. According to researchers, the Zuchongzhi is 2 to 3 times faster than Google's Sycamore processor, solving a problem in 1.2 hours that would take 8 years for the most powerful supercomputer to solve.

https://www.techspot.com/news/90355-chi ... ce-66.html
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Re: Quantum Computing

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Investors are dumping money into quantum computing firms in hopes of a big payday
"We are probably still in the vacuum-tube era equivalent for quantum computers"

Investors are pumping money into quantum computing firms at an accelerated rate in hopes of a big payday down the road. According to financial research firm PitchBook, outfits that deal in quantum computer hardware and software have brought in nearly $1.02 billion from venture capitalists this year alone. That’s up from $684 million generated in 2020 and just $188 million in 2019, and doesn’t even count a recent development in the industry.

https://www.techspot.com/news/91695-inv ... s-big.html
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Re: Quantum Computing

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China makes a quantum computer streets ahead of the US
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According to a recent study published in the peer-reviewed journals Physical Review Letters and Science Bulletin. Interesting Engineering reports that the supercomputer, called Jiuzhang 2, can calculate in a single millisecond a task that the fastest conventional computer in the world would take a mind-numbing 30 trillion years.
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https://www.fudzilla.com/news/53787-chi ... -of-the-us
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Re: Quantum Computing

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The State of Quantum Computing Systems
Current Designs and Future Challenges
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In the first part of this series, we discussed various aspects which make classical computing fundamentally different from quantum computing. We encourage you to go over that article for more details, but a few basic takeaways are:

- Quantum bits (qubits) are not binary: they are a superposition of both 0 and 1 values, and thus are much more expressive than a classical digital bit.
- Qubits exhibit a property known as entanglement. This property means that two (or more) qubits are intrinsically associated with one another. Einstein defined this as “spooky action at a distance.”
- Qubits decohere over time. In other words, maintaining the value of qubits is a fundamental challenge for the realization of fault tolerant (FT) quantum systems of the future.

Given these physical building blocks, what types of technologies can actually take advantage of these properties?
...
https://www.techspot.com/article/2361-s ... g-systems/
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Re: Quantum Computing

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IBM clears the 100-qubit mark with its new processor
Company says it's on track for 1,000+ qubits, useful computations in 2023.
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But what may be more significant is that IBM now has a roadmap that would see it producing the first 1,000-qubit processor in two years. And, according to IBM Director of Research Darío Gil, that's the point where calculations done with quantum hardware will start being useful.
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https://arstechnica.com/science/2021/11 ... processor/
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Re: Quantum Computing

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Math may have caught up with Google’s quantum-supremacy claims
But, given the rapidly evolving quantum computing landscape, that may not matter.

In 2019, word filtered out that a quantum computer built by Google had performed calculations that the company claimed would be effectively impossible to replicate on supercomputing hardware. That turned out to not be entirely correct, since Google had neglected to consider the storage available to supercomputers; if that were included, the quantum computer's lead shrank to just a matter of days.
...
https://arstechnica.com/science/2021/11 ... cy-claims/
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