Tag: quantum computers

A speed limit also applies in the quantum world

Even in the world of the smallest particles with their own special rules, things cannot proceed infinitely fast. Physicists at the University of Bonn have now shown what the speed limit is for complex quantum operations. The study also involved scientists from MIT, the universities of Hamburg, Cologne and Padua, and the Jülich Research Center. The results are important for the…

Quantum computing: When ignorance is wanted

Quantum computers promise not only to outperform classical machines in certain important tasks, but also to maintain the privacy of data processing. The secure delegation of computations has been an increasingly important issue since the possibility of utilizing cloud computing and cloud networks. Of particular interest is the ability to exploit quantum technology that allows for unconditional security, meaning that no…

Swiss Company Claims Weakness Found in Post-Quantum Encryption, Touts Its New Encryption Protocol

“A Swiss technology company says it has made a breakthrough by using quantum computers to uncover vulnerabilities in commonly used encryption,” reports Bloomberg: Terra Quantum AG said its discovery “upends the current understanding of what constitutes unbreakable” encryption… Terra Quantum AG has a team of about 80 quantum physicists, cryptographers and mathematicians, who are based in Switzerland, Russia, Finland and the…

IBM Quantum Computers Now Finish Some Tasks In Hours, Not Months

IBM has found a way to combine a new program execution environment, Qiskit, with a balance of “classical” and quantum computing to deliver a 100 times speedup for tasks that depend on iterative circuit execution. Computations that take months now will take mere hours, IBM said. Engadget reports: Qiskit by itself allows more circuits to run at a “much faster” rate,…

Quantum systems learn joint computing

Today’s quantum computers contain up to several dozen memory and processing units, the so-called qubits. Severin Daiss, Stefan Langenfeld, and colleagues from the Max Planck Institute of Quantum Optics in Garching have successfully interconnected two such qubits located in different labs to a distributed quantum computer by linking the qubits with a 60-meter-long optical fiber. Over such a distance they realized…

Beyond qubits: Team takes next big step to scale up quantum computing

Scientists and engineers at the University of Sydney and Microsoft Corporation have opened the next chapter in quantum technology with the invention of a single chip that can generate control signals for thousands of qubits, the building blocks of quantum computers. …

Quantum hyperchaos could help build better quantum computers

When quantum computers get too complex, they can display hyperchaotic behaviour – like chaos, but more chaotic – and understanding it could help improve computer designs Source: https://www.newscientist.com/article/2265707-quantum-hyperchaos-could-help-build-better-quantum-computers/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home…

Error-protected quantum bits entangled for the first time

For the first time, physicists from the University of Innsbruck have entangled two quantum bits distributed over several quantum objects and successfully transmitted their quantum properties. This marks an important milestone in the development of fault-tolerant quantum computers. The researchers published their report in Nature. …

The realization of a single-quantum-dot heat valve

While many research teams worldwide are trying to develop highly performing quantum computers, some are working on tools to control the flow of heat inside of them. Just like conventional computers, in fact, quantum computers can heat up significantly as they are operating, which can ultimately damage both the devices and their surroundings. …