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Opinion The scientific community celebrated April 14 as World Quantum Day to raise awareness of quantum science’s impact across diverse fields The world of science is on the cusp of a transformative era driven by the burgeoning field of quantum technology. Quantum science is founded on several key principles that underpin the behaviour of particles and systems at the quantum scale. The term “quantum scale” refers to the realm of physics that deals with phenomena occurring at very small scales, typically at the level of atoms, subatomic particles and fundamental particles. It encompasses the principles of quantum mechanics, which govern...

Quantum computers have the potential to outperform classical computers on several complex tasks, yet many challenges will need to be overcome before they reach their full potential. In the meantime, physicists and computer scientists have been trying to realistically estimate the capabilities that quantum computing technologies will exhibit in the near future. Quantum simulations—realizations of quantum systems manifested using programmable simulation devices—have proved particularly valuable for determining the near-term potential of quantum computers. One approach that can be investigated using quantum simulations is quantum annealing, an optimization process based on engineered quantum fluctuations. The quantum simulation of the 1D Ising...

By shining a laser pulse sequence inspired by the Fibonacci numbers at atoms inside a quantum computer, physicists have created a remarkable, never-before-seen phase of matter. The phase has the benefits of two time dimensions despite there still being only one singular flow of time... This mind-bending property offers a sought-after benefit: Information stored in the phase is far more protected against errors than with alternative setups currently used in quantum computers. As a result, the information can exist without getting garbled for much longer, an important milestone for making quantum computing viable, says study lead author Philipp Dumitrescu. The...

There’s a reason why Microsoft, Google, IBM, and governments across the globe keep making large investments in quantum computing; they expect it will revolutionize the world by addressing issues that today’s conventional computers can’t solve. Every industry will be affected by quantum computing. They will alter the way business is done and the security systems in place which protect data, how we battle illnesses and create new materials, as well as how we tackle health and climate challenges. As the race to build the first commercially functional quantum computer heats up, here we discuss a handful of the ways quantum...

Experts believe that the world has entered into the quantum decade — an era when enterprises begin to see quantum computing’s business valueQuantum computing has progressed from an experiment to a tool to an apparatus that is now making advances in the venture to tackle complex issues. Experts accept that the world has gone into the ‘Quantum Decade’ — an era when ventures start to see quantum computing’s business esteem. The advances in equipment, software development, and administrations approve the technology’s momentum, which is making it ready for additional breakthroughs in 2022 and helps the market for the inevitable reception...

Originally built to speed up calculations, a machine-learning system is now making shocking progress at the frontiers of experimental quantum physicsQuantum physicist Mario Krenn remembers sitting in a café in Vienna in early 2016, poring over computer printouts, trying to make sense of what MELVIN had found. MELVIN was a machine-learning algorithm Krenn had built, a kind of artificial intelligence. Its job was to mix and match the building blocks of standard quantum experiments and find solutions to new problems. And it did find many interesting ones. But there was one that made no sense. “The first thing I thought...

Quantum teleportation is a "disembodied" transfer of quantum states from one location to another. The quantum teleportation of a qubit is achieved using quantum entanglement, in which two or more particles are inextricably linked to each other. If an entangled pair of particles is shared between two separate locations, no matter the distance between them, the encoded information is teleported. In a paper published in PRX Quantum, the team presents for the first time a demonstration of a sustained, long-distance teleportation of qubits made of photons (particles of light) with fidelity greater than 90%. The qubits were teleported over a...

FULL TITLE: QUANTUM TIME Scientists have built world’s first ‘time machine’ in experiment which defies the laws of physics ============================================================ Lead researcher Dr Gordey Lesovik said by putting scattered electrons back into their original shape they had effectively created a state which went against the 'direction of time' ============================================================ SCIENTISTS have built the world’s first time machine — sort of. Working with electrons in the bizarre realm of quantum mechanics, they first created the equivalent of a break for a game of pool. The “balls” scattered and, according to the laws of physics, should have appeared to split in a...

Many companies and researchers are investigating quantum computing as one of the next major steps in the evolution of computers. The “spooky” effects of quantum physics, it is hoped, will enable the creation of computers that operate on certain tasks at unprecedented levels of performance. Microsoft is one of those companies, and it has been looking at quantum computing for some time now. Today, however, the company is taking the next step of actively investing in the creation of a real, scaleable quantum computer that can be used to tackle real-world problems, as the company outlines on the official Microsoft...

The significant advance, by a team at the University of New South Wales (UNSW) in Sydney appears today in the international journal Nature. "What we have is a game changer," said team leader Andrew Dzurak, Scientia Professor and Director of the Australian National Fabrication Facility at UNSW. "We've demonstrated a two-qubit logic gate - the central building block of a quantum computer - and, significantly, done it in silicon. Because we use essentially the same device technology as existing computer chips, we believe it will be much easier to manufacture a full-scale processor chip than for any of the leading...

Summary: In the quantum world, the future predicts the past. Playing a guessing game with a superconducting circuit called a qubit, a physicist has discovered a way to narrow the odds of correctly guessing the state of a two-state system. By combining information about the qubit's evolution after a target time with information about its evolution up to that time, the lab was able to narrow the odds from 50-50 to 90-10.We're so used to murder mysteries that we don't even notice how mystery authors play with time. Typically the murder occurs well before the midpoint of the book, but...

When asked what he likes best about working for Google, physicist John Martinis does not mention the famous massage chairs in the hallways, or the free snacks available just about anywhere at the company's campus in Mountain View, California. Instead, he marvels at Google's tolerance of failure in pursuit of a visionary goal. “If every project they try works,” he says, “they think they aren't trying hard enough.” Martinis reckons that he is going to need that kind of patience. In September, Google recruited him and his 20-member research team from the University of California, Santa Barbara, and set them...

A new silicon chip capable of manipulating the spin of a single electron could ultimately allow futuristic quantum computers to be built using conventional electronic technology, researchers say. A quantum bit, or "qubit", is analogous the bits used in conventional computers. But, instead of simply switching between two states, representing "0" and "1", quantum physics permits a qubit to exist in more than one state simultaneously, until its state is measured. This means quantum computers can essentially perform multiple calculations at once, giving them the potential to be exponentially more powerful than conventional computers ... 'Breakthrough experiment' Researchers have also...

A completely new kind of computer is rising on the technology horizon, and it has just reached a significant milestone.  A quantum computer, a device first suggested decades ago by Richard Feynman and others, has been constructed by Isaac Chuang and his coworkers at IBM?s Almaden Research Center in California.  The prototype quantum computer uses entangled nuclear spins for storage and has a capacity of seven ?qubits?, a term that will be discussed below.  Using a quantum-computing algorithm developed by AT&T's Peter Schor in 1995, this quantum computer has factored the number 15 into its prime- factors, 3 and...