Why quantum volume is vital for plotting the path to quantum advantage



Quantum quantity, a metric for measuring the computational capability of quantum computer systems, is gaining acceptance from Gartner.

Quantum computing: The most important cybersecurity threats
At RSA 2019, John Prisco of Quantum Xchange mentioned what options organizations ought to think about to guard in opposition to quantum threats.

Measuring the computational capability of quantum computer systems is—as is something involving quantum programs—a fancy downside. Counting the variety of qubits in a quantum pc to find out computational energy is just too simplistic to be functionally helpful—variations in how particular person qubits are related, how the qubits themselves are designed, and environmental components make one of these comparability inequitable.

For instance, D-Wave is planning to launch a 5,000-qubit system for cloud-based entry in mid-2020. Google, for distinction, has a 72-qubit quantum pc known as “Bristlecone” and IBM’s Q System One is a 20-qubit design. Variations in how these qubits are designed and related make cross-vendor comparisons unreliable—whereas D-Wave’s upcoming 5,000-qubit system will undoubtedly be extra succesful than its current-generation 2,000-qubit system, it isn’t essentially higher than IBM’s designs, or Google’s prototypes. Additional, D-Wave’s design is a quantum annealer, helpful for a single kind of calculation known as “quadratic unconstrained binary optimization (QUBO).”

SEE: Quantum computing: An insider’s information (free PDF) (TechRepublic)

In distinction, the IBM and Google designs are general-purpose quantum computer systems, and can be utilized for a greater variety of calculations, together with integer factorization—a sort of operation obligatory to interrupt RSA encryption. Varied varieties of qubit designs exist in general-purpose quantum computer systems, together with superconducting qubits, ion-trap programs, semiconductor-based and spin qubits.

An ordinary for measuring the computational capability of quantum computer systems was proposed by IBM in 2017, known as “quantum quantity.” Quantum quantity is measured by calculating the variety of bodily qubits, connectivity between qubits, and time to decoherence, in addition to the out there gate set, and variety of operations that may be run in parallel. 

In response to the researchers who outlined quantum quantity, that metric “permits the comparability of with extensively totally different efficiency traits and quantifies the complexity of algorithms that may be run.” Likewise, the researchers famous that quantum quantity can solely improve if the variety of qubits, and the error price of these qubits, improve in parallel.

On Monday, at Gartner’s Catalyst Convention in San Diego, the analysis and advisory agency embraced the quantum quantity benchmark as an essential means of measuring progress towards quantum benefit—the purpose at which quantum computer systems are able to performing a calculation demonstrably quicker than conventional computer systems—and famous the significance of quantum quantity in planning for adoption of quantum computer systems.


Picture: Gartner/IBM

Whereas it’s presently unclear when quantum benefit will likely be achieved, Gartner tasks analysis of quantum use circumstances within the enterprise by 2022, with early quantum purposes in deployment by 2026, and industrial use of quantum computing by 2030.

For extra on quantum computing, try “Why post-quantum encryption will likely be crucial to guard present classical computer systems,”http://www.techrepublic.com/”IBM reduces noise in quantum computing, rising accuracy of calculations,”http://www.techrepublic.com/”D-Wave’s 2000Q variant reduces noise for cloud-based quantum computing,” and “Quantum computing will not be a cure-all for enterprise computing challenges” on TechRepublic.

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Blue glowing quantum computerBlue glowing quantum computer

Picture: Getty Photographs/iStockphoto


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