Qubits

Newfound Superconductor Material Could Be The 'silicon Of Quantum Computers'

Newly discovered properties in the compound uranium ditelluride show that it could prove highly resistant to one of the nemeses of quantum computer development -- the difficulty with making such a computer's memory storage switches, called qubits,...
Related topics: Superconductors, Quantum

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Schrödinger's Cat With 20 Qubits

Dead or alive, left-spinning or right-spinning—in the quantum world particles such as the famous analogy of Schrödinger's cat can be all these things at the same time. An international team, including researchers from several leading American...
Related topics: Quantum, Physics

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Granular Aluminum For Future Computers

Computers based on quantum mechanical principles can solve certain tasks particularly efficiently. Their information carriers, the so-called qubits, not only have the values "0" and "1," but also states in between, called superposition states....
Related topics: Quantum

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Researchers Build Transistor-like Gate For Quantum Information Processing — With Qudits

Quantum information processing promises to be much faster and more secure than what today’s supercomputers can achieve, but doesn’t exist yet because its building blocks, qubits, are notoriously unstable. Purdue University researchers...
Related topics: Quantum, Physics, Purdue University

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Coupling Qubits To Sound In A Multimode Cavity

In a recent study, researchers at the University of Colorado have resolved phonon Fock states in the spectrum of a superconducting qubit coupled to a multimode acoustic cavity. Fock states (or number states) are quantum states with a clearly defined...
Related topics: Superconductors, Quantum, Physics

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Photons Dance Along A Line Of Superconducting Qubits

Enlarge / Atoms are always up to something. (credit: Jurgen Appelo / Flickr) When I think about computing, I usually think about it in terms of individual logic gates performing specific operations. These can be strung together to create more...
Related topics: Superconductors, Flickr

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Quantum World-first—researchers Reveal Accuracy Of Two-qubit Calculations In Silicon

For the first time ever, researchers have measured the fidelity—that is, the accuracy—of two-qubit logic operations in silicon, with highly promising results that will enable scaling up to a full-scale quantum processor.
Related topics: Quantum, Physics

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Electron Qubit Non-destructively Read: Silicon Qubits May Be Better

Enlarge (credit: Takashi Nakajima) I suspect that if you asked an engineer at Intel about quantum computing, they probably wouldn’t want to know about it unless the chips could be fabricated using standard fabrication technology. Using standard...
Related topics: Electrons, Intel, Quantum, Physics

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Extremely Accurate Measurements Of Atom States For Quantum Computing

A new method allows the quantum state of atomic 'qubits'--the basic unit of information in quantum computers -- to be measured with twenty times less error than was previously possible, without losing any atoms.
Related topics: Quantum, Physics

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Can Entangled Qubits Be Used To Probe Black Holes?

Physicists have used a seven-qubit quantum computer to simulate the scrambling of information inside a black hole, heralding a future in which entangled quantum bits might be used to probe the mysterious interiors of these bizarre objects.
Related topics: Black Holes, Physics, Quantum

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Weirdly Interconnected Qubits Give D-wave A Big Jump In Performance

Enlarge / "The Great Wave off Kanagawa," a 19th-century woodcut print by Japanese artist Katsushika Hokusai. (credit: Public domain) Last week, D-Wave announced a new version of its quantum annealing computer. The new machine includes a number of...
Related topics: Quantum, Physics

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D-wave Announces Its Next-gen Quantum Computing Platform

D-Wave, the well-funded quantum computing company, today announced its next-gen quantum computing platform with 5,000 qubits, up from 2,000 in the company’s current system. The new platform will come to market in mid-2020. The company’s...
Related topics: Quantum, Physics

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Ibm Just Unveiled A 'quantum Computing System' For Commercial Use

The quantum computing train keeps on rolling.  A year after IBM showed off a 50-qubit quantum computer prototype at CES, the company has returned to the annual electronics show in Las Vegas, Nevada, with a grand announcement. Namely, that it...
Related topics: Quantum, Physics

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Physicists Record 'lifetime' Of Graphene Qubits

Researchers have recorded, for the first time, quantum coherence of a graphene-based superconducting qubit, meaning how long it stays in superposition to compute with two logical states simultaneously. The work is a key step forward for practical...
Related topics: Physics, Graphene, Quantum, Superconductors

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Hybrid Qubits Solve Key Hurdle To Quantum Computing

Researchers have crafted a new architecture for quantum computing. By constructing a hybrid device made from two different types of qubit -- the fundamental computing element of quantum computers -- they have created a device that can be quickly...
Related topics: Quantum, Physics

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An Intermediary Between Qubits Provides Basis For Control And Scaling

Making a qubit is easy. Controlling how they communicate, however... (credit: NSF) Quantum computers are not like classical computers. I don't mean that in the sense that quantum computers perform calculations in a different manner, or that they...
Related topics: Quantum, Physics

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Qubits Kept Together By Shouting At Them With Microwaves

Enlarge / Not this kind of microwave, of course. (credit: Matthew Paul Argall) Companies like IBM and Google have leapt at the opportunity to build toy quantum computers. They’ve produced nice interfaces, so you can play quantum computing games....
Related topics: Microwaves, IBM, Google, Quantum

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Defects Promise Quantum Communication Through Standard Optical Fiber

An international team of scientists has identified a way to create quantum bits that emit photons that describe their state at wavelengths close to those used by telecom providers. These qubits are based on silicon carbide in which molybdenum...
Related topics: Quantum, Physics, Optical Fibers

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A New Way To Count Qubits

Researchers at Syracuse University, working with collaborators at the University of Wisconsin (UW)-Madison, have developed a new technique for measuring the state of quantum bits, or qubits, in a quantum computer.
Related topics: Quantum, Physics

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Straining A Diamond Makes Silicon-based Qubit Behave

Enlarge / This is a diamond. It probably even has impurities suitable for making a qubit. It is not a quantum computer (credit: Roger Blake) With the advent of toy quantum computers, I’ve been less interested in reporting on the developments of...
Related topics: Quantum

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