Firm focuses on fault-tolerant quantum architecture

Tokyo, March 17, 2022 – NEC Corporation (NEC; TSE: 6701) has developed the world’s first LHZ scheme (*1) unit cell facilitating scaling up to a fully-connected architecture using superconducting parametron (*2) quantum bits (qubits). NEC has succeeded in demonstrating quantum annealing operations using these qubits, which will enable high accuracy calculations. Via this achievement, NEC has made […]

The post NEC: First Unit Cell for Scaling up to a Fully-connected Quantum Annealing Architecture appeared first on insideHPC.

Quantum Business Europe aims to accelerate the next technological revolution by helping industry discover the wide-ranging potential of quantum innovations

The post European conference spotlights quantum for business appeared first on Physics World.

Nations compete on speed using very different compute architectures.

The post Chiplets Enter The Supercomputer Race appeared first on Semiconductor Engineering.

TOKYO, Mar 17, 2022 - (JCN Newswire) - NEC Corporation (TSE: 6701) has developed the world's first LHZ scheme(1) unit cell facilitating scaling up to a fully-connected architecture using superconducting parametron(2) quantum bits (qubits). NEC has succeeded in demonstrating quantum annealing operations using these qubits, which will enable high accuracy calculations. Via this achievement, NEC has made further progress toward the production of a quantum annealing machine(3), which is a type of quantum computer.
Combinational optimization is important for finding solutions to complex social issues. It aims to find the optimal solution from an enormous set of potential choices. In 1999, NEC developed a superconducting qubit for use in gate-type quantum computers. Since then, NEC has applied the technology in the research and development of a quantum annealing machine using superconducting parametron qubits that can solve combinatorial optimization problems at high speed and with great accuracy.

NEC has developed a four qubit unit cell of the LHZ scheme. This enables scaling to multiple fully-connected logical qubits utilizing superconducting parametron and circuit coupling technology. NEC has achieved a world first by successfully solving small-scale combinatorial optimization problems via quantum annealing using this new technology. In another world first, NEC has also developed a three-dimensional structure technology that efficiently connects many LHZ scheme unit cells arranged in a tile pattern with external devices.

By replicating the unit cell in a tile pattern, it is possible to easily create a structure where many qubits are logically connected to each other, whilst maintaining the features of the superconducting parametron that allow it to perform calculations with high accuracy. NEC has made progress toward the realization of a quantum annealing machine that can solve large-scale and complex combinatorial optimization problems at high speed.

NEC is working to develop a quantum annealing machine using superconducting parametrons as a project(4) commissioned by the New Energy and Industrial Technology Development Organization (NEDO). NEC is currently conducting research and development to improve the integration of superconducting parametrons in a fully connected architecture, with the aim of realizing quantum annealing machines by 2023. NEC will use these results as building blocks to further accelerate the development of quantum computers.

(1) LHZ scheme: LHZ is an abbreviation for a technique proposed by Lechner, Hauke and Zoller. As the number of qubits increases, it becomes difficult in hardware to directly connect each qubit to each of the other qubits. To solve this problem, ParityQC proposed with LHZ a transformation that enables fully connected qubits to be obtained using qubits that are physically connected to only their nearest neighbours. A unit cell, composed of four qubits and a central coupling circuit connecting them can be replicated using a tile-like pattern.
About ParityQC: https://parityqc.com/
(2) Superconducting parametron: A superconducting resonant circuit composed of Josephson junctions and capacitors which oscillates with different phases and can be used as a qubit. The lifetime of the qubit (which determines the upper limit of the time for which high-speed operation is possible) is an order of magnitude longer than that of magnetic flux qubits. It is expected that calculations performed within a fixed time period will have improved accuracy.
(3) Quantum Annealing Machine: A computer that exploits the laws of quantum mechanics to search for the minimum energy state of a cost function. The minimum energy state corresponds to the solution of the combinatorial optimization problem. The smallest unit to be calculated is a qubit. As the number of qubits increases and the connectivity between the qubits increases, larger and more complex combinatorial optimization problems can be solved.
(4) Project for Innovative AI Chip and Next-Generation Computing Technology Development
https://www.nedo.go.jp/english/activities/activities_ZZJP_100123.html

About NEC Corporation

NEC Corporation has established itself as a leader in the integration of IT and network technologies while promoting the brand statement of "Orchestrating a brighter world." NEC enables businesses and communities to adapt to rapid changes taking place in both society and the market as it provides for the social values of safety, security, fairness and efficiency to promote a more sustainable world where everyone has the chance to reach their full potential. For more information, visit NEC at https://www.nec.com.


Copyright 2022 JCN Newswire. All rights reserved. www.jcnnewswire.comNEC Corporation (TSE: 6701) has developed the world's first LHZ scheme unit cell facilitating scaling up to a fully-connected architecture using superconducting parametron quantum bits (qubits).

Results mark the beginning of a new phase in quantum simulation, say physicists

The post Time crystals on a quantum computer reach a record size appeared first on Physics World.

PARIS, 10 March, 2022: — French quantum computing startup Alice&Bob today announced what it said is an advance towards the first marketable quantum computer. “In a major scientific breakthrough, Alice&Bob has eliminated one of the main barriers to, and significantly reduced the complexity of, delivering a functional quantum computer – a goal that could now […]

The post Quantum Start-up Alice&Bob Raises Є27M; Claims Error Correction Breakthrough appeared first on insideHPC.

STUTTGART, Germany, March 9, 2022 —- Quantum Brilliance, a German-Australian manufacturer of innovative quantum computing hardware, today announced it is the commercialization partner in a $17.5 million research project funded by the German government to develop a compact, scalable quantum computer demonstrator with spin-photon qubits leveraging synthetic diamonds. Led by the Fraunhofer Institute for Applied Solid State […]

The post Quantum Brilliance Named Partner in $17.5M German Quantum Research Project appeared first on insideHPC.

Deal grants access to IBM quantum computing systems

COLLEGE PARK, MD – March 3, 2022 – Quantum computing company IonQ (NYSE: IONQ) today published results from its new barium-based quantum computer showing its state detection fidelity. The results reflect a 13x reduction in state preparation and measurement (SPAM) errors, a metric core to producing accurate and reliable quantum computers. On a per-qubit basis, […]

The post IonQ’s Barium Systems Demonstrate Qubit Readout Performance appeared first on insideHPC.

Quantum 6, 661 (2022).

https://doi.org/10.22331/q-2022-02-24-661

We introduce the hemicubic codes, a family of quantum codes obtained by associating qubits with the $p$-faces of the $n$-cube (for $n gt p$) and stabilizer constraints with faces of dimension $(ppm1)$. The quantum code obtained by identifying antipodal faces of the resulting complex encodes one logical qubit into $N = 2^{n-p-1} tbinom{n}{p}$ physical qubits and displays local testability with a soundness of $Omega(1/log(N))$ beating the current state-of-the-art of $1/log^{2}(N)$ due to Hastings. We exploit this local testability to devise an efficient decoding algorithm that corrects arbitrary errors of size less than the minimum distance, up to polylog factors. We then extend this code family by considering the quotient of the $n$-cube by arbitrary linear classical codes of length $n$. We establish the parameters of these generalized hemicubic codes. Interestingly, if the soundness of the hemicubic code could be shown to be constant, similarly to the ordinary $n$-cube, then the generalized hemicubic codes could yield quantum locally testable codes of length not exceeding an exponential or even polynomial function of the code dimension.

Feb. 23, 2022 — Today, IonQ (NYSE: IONQ) announced that IonQ Aria, the company’s latest quantum computer, has achieved a record 20 algorithmic qubits and has furthered its lead as the most powerful quantum computer in the industry based on standard application-oriented industry benchmarks. IonQ Aria, currently available for customers in private beta, has the potential […]

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