Stanford New Measurement to Ensure High Quality Quantum Dots

Stanford has a new measurement technique for quantum dots. Uncertainty about the quality of quantum dots are holding back the use of quantum dots. Above – A close-up artist’s rendering of quantum dots emitting light they’ve absorbed. (Image credit: Ella Marushchenko) Quantum dots are strikingly defect-tolerant. The measurement technique is the first to firmly resolve …

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Two Different Quantum Dot Qubits Combined to Overcome Limitations

RIKEN Center for Emergent Matter Science has constructed a hybrid quantum device made from two different types of qubits. They have created a device that can be quickly initialized and read out, and that simultaneously maintains high control fidelity. They combined single-spin qubit called a Loss-DiVincenzo qubit and a singlet-triplet qubit. The Loss-DiVincenzo qubit has …

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Superconducting nanowires created that are promising for future quantum computers

Dutch researchers have successfully developed nanowires allowing individual electrons to be captured by a ‘quantum dot’ on which superconductivity can take place. These nanowires could make powerful quantum computers. The combination of a quantum dot and superconductivity makes it possible to create ‘Majorana fermions’, exotic particles that are their own antiparticle and which are regarded …

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Los Alamos quantum dots will make cost effective double-pane solar windows

Using two types of “designer” quantum dots, researchers are creating double-pane solar windows that generate electricity with greater efficiency and create shading and insulation for good measure. It’s all made possible by a new window architecture which utilizes two different layers of low-cost quantum dots tuned to absorb different parts of the solar spectrum. Above …

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High 99.9+% fidelity quantum dot qubit is promising for large scale systems

Nature Nanotechnology – A quantum-dot spin qubit with coherence limited by charge noise and fidelity higher than 99.9% Jun Yoneda, Kenta Takeda, Tomohiro Otsuka, Takashi Nakajima, Matthieu R. Delbecq, Giles Allison, Takumu Honda, Tetsuo Kodera, Shunri Oda, Yusuke Hoshi, Noritaka Usami, Kohei M. Itoh & Seigo Tarucha, Dec 18, 2017. Abstract The isolation of qubits …

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Japan launching quantum computer prototype likely based on quantum dot and photonics

Japan has unveiled its first quantum computer prototype, amid a global race to build ever-more powerful machines with faster speeds and larger brute force that are key towards realizing the full potential of artificial intelligence. Japan’s machine can theoretically make complex calculations 100 times faster than even a conventional supercomputer, but use just 1 kilowatt …

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Seeing The Invisible With A Graphene-CMOS Integrated Device

EU Graphene Flagship researchers from ICFO (The Institute of Photonic Sciences in Barcelona) have shown that it is possible to integrate graphene into a CMOS integrated circuit. In their paper published in the journal Nature Photonics they combine this graphene-CMOS device with quantum dots to create an array of photodetectors, producing a high resolution image …

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Quantum computing closer to reality with new materials

Vuckovic’s Stanford team is developing materials that can trap a single, isolated electron. Working with collaborators worldwide, they have recently tested three different approaches to the problem, one of which can operate at room temperature – a critical step if quantum computing is going to become a practical tool. In all three cases the group …

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Fedex is investing in autonomous trucks, and is interested in delivery robots and an Alexa app

Your FedEx package might someday be delivered by a robot. Rob Carter, FedEx’s chief information officer, says the shipping giant is considering small vehicles that could drive around neighborhoods and make deliveries without human drivers. Carter is responsible for setting the technology agenda across FedEx’s various operating companies, including its planes-and-trucks Express shipping service and …

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US Carrier system for landing planes repeatably is making progress after re-engineering but US Senate authorization could force re-certification for 130% cost overrun

The troubled General Atomics Advanced Arresting Gear program is doing well in its delayed testing program on land and on carrier Gerald R. Ford (CVN-78), the head of Naval Sea Systems Command told reporters on Wednesday. Last month, Naval Air Systems Command successfully landed an F/A-18E Super Hornet at its land-based test facility in Joint …

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