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Physicists at the University of Innsbruck have succeeded in creating hot Schrödinger cat states in a superconducting microwave resonator.

Schrödinger's cat is scratching its head over the "topological" qubit that is causing a buzz in quantum computing. We should be, too

Dubbed Ocelot, it's designed to correct errors with less hardware overhead.

Being able to scale physical qubits reliably is nice, of course. Now comes the hard part: actual circuits.

A team of researchers at Microsoft Quantum has reportedly achieved a first milestone toward creating a reliable and practical quantum computer. In their paper, published in the journal Physical Review B, the group describes the milestone and their plans to build a reliable quantum computer over the next 25 years.

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The new Osprey 433-qubit processor along with the systems that support and enable it are key milestones on IBM's path to more powerful and practically useful quantum computing technology.

A collaboration between computer scientists and physicists at the University of Chicago broke through one of the key obstacles for large-scale quantum computing by figuring out how to move their control signals "inside the fridge."

MIT researchers developed a superconducting qubit architecture that can perform operations between qubits with much higher accuracy than scientists have yet been able to achieve. Utilizing a superconducting qubit called fluxonium, the architecture is scalable and could be used to build a large-scale quantum computer.

A sequel to its Tunnel Falls quantum processor is under development. The technology's promise to improve batteries, finance and AI mostly remains years away.

A fluxonium qubit can keep its most useful quantum properties for about 1.48 milliseconds, drastically longer than similar qubits currently favoured by the quantum computing industry

Just as the sound of a guitar depends on its strings and the materials used for its body, the performance of a quantum computer depends on the composition of its building blocks. Arguably the most critical components are the devices that encode information in quantum computers.

Researchers at Toshiba Corporation have achieved a breakthrough in quantum computer architecture: the basic design for a double-transmon coupler that will improve the speed and accuracy of quantum computation in tunable couplers. The coupler is a key device in determining the performance of superconducting quantum computers.

Using a superconducting qubit called fluxonium, MIT researchers in the departments of Physics and EECS, and in the Research Laboratory of Electronics, developed two new control techniques to achieve a world-record single-qubit fidelity of 99.998%.

A new study from researchers at Japan's RIKEN Center for Quantum Computing and Toshiba reveals a high-fidelity quantum gate that promises to significantly...

Can a small machine that makes error correction easier upend the market?

Germany's first cryogenic measuring setup for statistical quality measurement of qubit devices on whole 200- and 300-mm wafers has started operation at Fraunhofer IAF. The on-wafer prober can characterize devices based on semiconductor quantum dots and quantum wells as well as superconductors at measurement temperatures below 2 K.

Article URL: https://www.uni-hamburg.de/en/newsroom/presse/2023/pm45.html Comments URL: https://news.ycombinator.com/item?id=37209587 Points: 1 # Comments: 0

I have mixed feelings about IBM's announcement of its 127-qubit Eagle quantum computer. Yes, it's a significant engineering achievement, but it doesn't actually offer any significant benefit to…

Research conducted within the Cluster of Excellence "Matter and Light for Quantum Computing" (ML4Q) has analyzed cutting-edge device structures of quantum computers to demonstrate that some of them are indeed operating dangerously close to a threshold of chaotic meltdown. The challenge is to walk a thin line between too high, but also too low disorder to safeguard device operation. The study has been published…