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12-Spin-Qubit Arrays Fabricated on a 300 mm Semiconductor Manufacturing Line.
Nano Lett
December 2024
Intel Corporation, Technology Research Group, Hillsboro, Oregon 97124, United States.
Intel's efforts to build a practical quantum computer are focused on developing a scalable spin-qubit platform leveraging industrial high-volume semiconductor manufacturing expertise and 300 mm fabrication infrastructure. Here, we provide an overview of the design, fabrication, and demonstration of a new customized quantum test chip, which contains 12-quantum-dot spin-qubit linear arrays, code named Tunnel Falls. These devices are fabricated using immersion and extreme ultraviolet lithography (EUV), along with other standard high-volume manufacturing (HVM) processes as well as production-level process control.
View Article and Find Full Text PDFScalable hot carrier-assisted silicon photodetector array based on ultrathin gold film.
Nanophotonics
March 2024
Nanophotonics Research Center, Korea Institute of Science and Technology (KIST), Seoul, 02792, Republic of Korea.
Silicon (Si) offers cost-effective production and convenient on-chip integration for photodetection due to its well-established CMOS technology. However, the indirect bandgap of Si inherently limits its detection efficiency in the near-infrared (NIR) regime. Here, we propose a strategy to achieve high NIR photoresponse in Si by introducing a strong light-absorbing ultrathin gold (Au) film to generate hot carriers.
View Article and Find Full Text PDFStrong hole-photon coupling in planar Ge for probing charge degree and strongly correlated states.
Nat Commun
November 2024
Hybrid Quantum Circuit Laboratory, Institute of Physics and Center for Quantum Science and Engineering, École Polytéchnique Fédérale de Lausanne (EPFL), Lausanne, 1015, Switzerland.
Semiconductor quantum dots (QDs) in planar germanium (Ge) heterostructures have emerged as front-runners for future hole-based quantum processors. Here, we present strong coupling between a hole charge qubit, defined in a double quantum dot (DQD) in planar Ge, and microwave photons in a high-impedance (Z = 1.3 kΩ) resonator based on an array of superconducting quantum interference devices (SQUIDs).
View Article and Find Full Text PDFNickel-Catalyzed Reductive Alkenylation of Enol Derivatives: A Versatile Tool for Alkene Construction.
Acc Chem Res
November 2024
State Key Laboratory of Applied Organic Chemistry (SKLAOC), College of Chemistry and Chemical Engineering, Lanzhou University, 222 South Tianshui Road, Lanzhou 730000, China.
Article Synopsis
- - Ketone-to-alkene transformations are important in organic chemistry, and recent nickel-catalyzed reductive alkenylation reactions show promise for creating a variety of alkenes using different functional groups.
- - The authors' research started with coupling α-chloroboronates, then expanded to include a range of radical-inactive compounds, leading to the development of new strategies for cross-selectivity in various chemical reactions.
- - These advancements enable efficient synthesis of valuable products, including functionalized cycloalkenes and diverse alkenes, by broadening the types of enol derivatives used in the reactions, making the approach more accessible and practical.
Universal control of four singlet-triplet qubits.
Nat Nanotechnol
October 2024
QuTech, Delft University of Technology, Delft, Netherlands.
The coherent control of interacting spins in semiconductor quantum dots is of strong interest for quantum information processing and for studying quantum magnetism from the bottom up. Here we present a 2 × 4 germanium quantum dot array with full and controllable interactions between nearest-neighbour spins. As a demonstration of the level of control, we define four singlet-triplet qubits in this system and show two-axis single-qubit control of each qubit and SWAP-style two-qubit gates between all neighbouring qubit pairs, yielding average single-qubit gate fidelities of 99.
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