In a potential boost for quantum computing and communication, a European research collaboration reported a new method of controlling and manipulating single photons without generating heat. The solution makes it possible to integrate optical switches and single-photon detectors in a single chip. …
Tag: Quantum Computing
Quantum Computer Solves Decades-Old Problem Three Million Times Faster Than a Classical Computer
ZDNet reports: Scientists from quantum computing company D-Wave have demonstrated that, using a method called quantum annealing, they could simulate some materials up to three million times faster than it would take with corresponding classical methods. Together with researchers from Google, the scientists set out to measure the speed of simulation in one of D-Wave’s quantum annealing processors, and found that…
Researchers send entangled qubit states through a communication channel for the first time
In a breakthrough for quantum computing, University of Chicago researchers have sent entangled qubit states through a communication cable linking one quantum network node to a second node. …
Lack of symmetry in qubits can’t fix errors in quantum computing, might explain matter/antimatter
A team of quantum theorists seeking to cure a basic problem with quantum annealing computers—they have to run at a relatively slow pace to operate properly—found something intriguing instead. While probing how quantum annealers perform when operated faster than desired, the team unexpectedly discovered a new effect that may account for the imbalanced distribution of matter and antimatter in the universe…
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…
D-Wave demonstrates performance advantage in quantum simulation of exotic magnetism
D-Wave Systems Inc. today published a milestone study in collaboration with scientists at Google, demonstrating a computational performance advantage, increasing with both simulation size and problem hardness, to over 3 million times that of corresponding classical methods. Notably, this work was achieved on a practical application with real-world implications, simulating the topological phenomena behind the 2016 Nobel Prize in Physics. This…
Microsoft’s Big Win in Quantum Computing Was an ‘Error’ After All
In a 2018 paper, researchers said they found evidence of an elusive theorized particle. A closer look now suggests otherwise. From a report: In March 2018, Dutch physicist and Microsoft employee Leo Kouwenhoven published headline-grabbing new evidence that he had observed an elusive particle called a Majorana fermion. Microsoft hoped to harness Majorana particles to build a quantum computer, which promises…
Applying quantum computing to a particle process
A team of researchers at Lawrence Berkeley National Laboratory (Berkeley Lab) used a quantum computer to successfully simulate an aspect of particle collisions that is typically neglected in high-energy physics experiments, such as those that occur at CERN’s Large Hadron Collider. …
First-ever observation of multi-photon Fano effect could lead to boost in quantum computing
In the first study of its kind, published by Nature Communications, an international team of researchers led by the University of Surrey has proven the existence of the fabled multi-photon Fano effect in an experiment. …
Quantum computing enables simulations to unravel mysteries of magnetic materials
A multi-institutional team became the first to generate accurate results from materials science simulations on a quantum computer that can be verified with neutron scattering experiments and other practical techniques. …