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By Dr Chris Mansell, Senior Scientific Writer at Terra Quantum Shown below are summaries of a few interesting research papers in quantum technology that we have seen over the past month. Hardware Title: Logical quantum processor based on reconfigurable atom arraysOrganizations: Harvard University; QuEra Computing Inc.; NIST/University of Maryland; Massachusetts Institute of TechnologyRydberg interactions enable logic gates to be performed between ultracold atoms. The infidelity of such gates has decreased exponentially from above 0.1 over a decade ago to well below 0.01 currently. Some of the recent success has arisen from making the atoms colder, placing them closer together and subjecting [...]

Quantum Computer at Osaka University A groundbreaking collaboration led by the Center for Quantum Information and Quantum Biology at Osaka University has successfully unveiled Japan's third superconducting quantum computer. Partnering with key institutions such as RIKEN, NTT Corporation, and Amazon Web Services, and a consortium including e-trees.Japan, Inc., Fujitsu Limited, QuEL, Inc., QunaSys Inc., and Systems Engineering Consultants Co.,LTD, the consortium leveraged a 64-qubit chip from RIKEN, showcasing a commitment to utilize Japanese domestic components. Set to be accessible via cloud services starting December 22, 2023, this achievement marks a significant stride in quantum computing accessibility. This quantum leap positions the [...]

The chip is codenamed Helium 1 and contains 16 qubits to test out Alice & Bob's cat qubit architecture for achieving a very high fidelity logical qubit. The term "tape out" means that the company has finished the design and sent the design files to a fabrication facility for construction. After the chip has been built, it will undergo extensive testing, characterization, and calibration by the company's engineering team to realize the optimum performance and then made available for external use by the company's customers. Any lessons learned during this process will be utilized in the design of the next chip [...]

About a year ago, the Defense Advanced Project Research Agency announced a new program called Underexplored Systems for Utility-Scale Quantum Computing (US2QC). Its purpose is to provide some funding for underexplored and revolutionary approaches to quantum computing that might achieve progress faster than some of the more conventional QC approaches being taken. (In other words, superconducting and ion trap developers need not apply!). As we reported in January, DARPA selected three manufacturers to participate in Phase 1 of this program including PsiQuantum (photonic based), Microsoft (topological qubit based), and Atom Computing (neutral atom based). In this phase, each participant worked to develop [...]

Infleqtion, a leading quantum information company, has been chosen by Japan’s Science and Technology Agency for the Quantum Moonshot program, positioning itself as the sole foreign quantum computing partner. This collaboration signifies a groundbreaking moment for Infleqtion's quantum computing platform. Working under the guidance of Professor Kenji Ohmori, a global authority in ultrafast atom control for quantum computing, Infleqtion will contribute to the development of a large-scale, fault-tolerant quantum computer based on atomic qubits. Professor Ohmori's recent achievement of an ultrafast 2-qubit gate between single atoms has dramatically accelerated the operation of neutral atom quantum computers. The Quantum Moonshot program aims [...]