Qubits

World-record Quantum Computing Result For Sydney Teams

A world-record result in reducing errors in semiconductor 'spin qubits', a type of building block for quantum computers, has been achieved using the theoretical work of quantum physicists at the University of Sydney Nano Institute and School of...
Related topics: Quantum, Physics, Semiconductors

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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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New Hurdle Cleared In Race Toward Quantum Computing

Researchers have created a new device that allows them to probe the interference of quasiparticles, potentially paving the way for the development of topological qubits.
Related topics: Quantum, Physics

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Quantifying How Much Quantum Information Can Be Eavesdropped

The most basic type of quantum information processing is quantum entanglement. Researchers have now provided a much finer characterization of the distributions of entanglement in multi-qubit systems than previously available. These findings can be...
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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Physicists Record 'lifetime' Of Graphene Qubits

Researchers from MIT and elsewhere have recorded, for the first time, the "temporal coherence" of a graphene qubit—meaning how long it can maintain a special state that allows it to represent two logical states simultaneously. The demonstration,...
Related topics: Physics, Graphene

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Hybrid Qubits Solve Key Hurdle To Quantum Computing

Spin-based quantum computers have the potential to tackle difficult mathematical problems that cannot be solved using ordinary computers, but many problems remain in making these machines scalable. Now, an international group of researchers led by...
Related topics: Quantum, Physics, Mathematics

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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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Tests Show Integrated Quantum Chip Operations Possible

Quantum computers that are capable of solving complex problems, like drug design or machine learning, will require millions of quantum bits—or qubits—connected in an integrated way and designed to correct errors that inevitably occur in fragile...
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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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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Scientists 'teleport' A Quantum Gate

Researchers have demonstrated one of the key steps in building the architecture for modular quantum computers: the 'teleportation' of a quantum gate between two qubits, on demand.
Related topics: Quantum, Physics, Teleportation

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Hole-based Artificial Atoms Could Be Key To Spin-based Qubit

A UNSW study published this week resolves key challenges in creation of hole-based artificial atoms, with excellent potential for more-stable, faster, more scalable quantum computing.
Related topics: Quantum, Physics

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Qubits Can Sync If They Have More Than Two Possible Values

Enlarge / Pendulums only provide a limited model for quantum oscillations. (credit: Flickr user Andreas) Here's something you might be familiar with: a performance ends, the audience begins to applaud, and the sound becomes thunderous and...
Related topics: Quantum, Physics, Flickr

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We’re A Tiny Step Closer To Quantum Computers: Chinese Scientists Managed To Entangle 18 Qubits

Qubits are the essential components of quantum computers. While bits have two states, 0 and 1, qubits also have a third, mixed state. But scientists still have to figure out a way to link them in large quantities to be able to create the hardware...
Related topics: Quantum, Physics

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18-qubit Entanglement Sets New Record

Physicists have experimentally demonstrated 18-qubit entanglement, which is the largest entangled state achieved so far with individual control of each qubit. As each qubit has two possible values, the 18 qubits can generate a total of 218 (or...
Related topics: Physics

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Ultimate Precision For Sensor Technology Using Qubits And Machine Learning

Extracting information quickly from quantum states is necessary for future quantum processors and super-sensitive detectors in existing technologies. Researchers demonstrate a new method that combines quantum phenomena and machine learning to...
Related topics: Quantum, Physics

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Chinese Team Successfully Simulate A 64-qubit Circuit

The quantum computer is a device based on the principles of quantum mechanics. Compared with classical bits, qubits can be at the superposition between “0” and “1”, so the quantum computer which is composed of qubits can...
Related topics: Quantum, Physics

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