Check your subscription status, update your details and more. The controversial idea that consciousness has a quantum origin is facing a new challenge, after a mathematical analysis appears to show that a long-known law of physics makes it impossible. What physical process makes us conscious, and whether we could observe and analyse it, is one of the great open questions of modern science. In the 1990s, mathematician Roger Penrose and anesthesiologist Stuart Hameroff proposed that classical physics can't explain consciousness alone and so it must arise in the quantum realm. The idea was received with scepticism and remains controversial, but attempts to bring quantumness into explanations of consciousness have persisted since.

The company has drawn governments, a major chipmaker, and the Pentagon into an effort to control fragile photons and build a useful quantum machine. It aims to be the first. PsiQuantum aims to build a quantum computer that can solve some of science's hardest problems. Its chips, cut from wafers like the one shown here, will perform computations using photons, the particles of light. The machine that could change the world will be housed in a room that looks like a data center crossed with an ice cream factory. Inside will be some 100 stainless-steel cabinets, each about six feet tall and connected to a supply of liquid helium that keeps them only a few degrees above absolute zero. Inside those cabinets will be hundreds of chips, and on those, thousands of particles of light flying through a maze of optical switches and beam splitters.

Peter Shor's algorithm could break the internet - but he's not worried Few people have invented an algorithm with the potential to spark a worldwide crisis, so why is quantum computing pioneer Peter Shor so unconcerned? "So, he's the Beyoncé of this event?" a young woman standing behind me says to a colleague. The three of us are standing, looking at the back of a crowd, whose members are all looking at a bearded man in an orange sweater. Getting a look at him is like trying to see the - only fleeting glimpses are possible. "His algorithm is the algorithm that will break everything," the colleague says, as I briefly catch sight of people posing for selfies and getting their conference badges signed.

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The US government wants to get hold of a quantum computer good enough to contribute to scientific breakthroughs in just two years. It will use it to try to accelerate the research and development of new materials, pharmaceuticals and molecules useful in agriculture and manufacturing. Once a dream of theoretical physicists, quantum computers are now undoubtedly real, but have yet to prove unambiguously useful or to have broad commercial value. Their computational power depends on their size - how many components called qubits they comprise - and how reliable they are. Existing devices are still too small and too error-prone.

Can video games help us better understand quantum mechanics? The world of quantum video games is vast - there are hundreds that are either inspired by quantum mechanics or use quantum computers in their development. A pale yellow square awkwardly lands on a green block shaped like the letter "z". Next to them stands a pillar made of smaller turquoise blocks. We've all seen, you can probably picture it.

Some of the optical components used in Atom Computing's quantum computer The race to build the first truly useful quantum computer just got more exciting. A quantum computer made from extremely cold atoms has now passed some of the most important milestones towards usefulness, joining a small group of equally able and promising machines. Though there is wide agreement that sufficiently powerful quantum computers would transform our ability to discover new materials and drugs, and break the encryption that underpins the internet, there are many competing ideas about how best to build them. Industry mainstays such as Google and IBM have spent a decade building quantum computers from tiny superconducting circuits, and this approach is currently the front-runner. But an alternate approach that uses electrically neutral ultracold atoms has recently been gaining traction.

Quantum Backrooms is a horror game in which the player explores eerie rooms. A quantum computer has been used to create a horror video game called - and it's available to play online. Peculiarities of quantum objects have long inspired philosophers and artists, and now game developers are getting the bug too. James Wootton at Moth Quantum and his colleagues developed, a horror game with labyrinthine levels generated by a real quantum computer . The game draws inspiration from "the Backrooms," a horror legend developed on internet forums that consists of moving through a series of endless rooms.

King's College team wins access to cutting-edge Google quantum chip Scientists from King's College London have become the first UK academic research team to gain access to Google's cutting-edge quantum computer chip Willow as part of a scheme launched with the UK's national quantum lab last year. Quantum computers can in theory solve problems which the most powerful conventional computers cannot. King's lead for the project Dr Eleanor Crane said its use of Willow would light a torch for research to answer questions about the most important natural processes. It would be useful if society could understand how plants transform sunlight into energy, find materials which transport electricity quickly, or how molecules bind to each other, said Crane, who will co-lead the research team alongside Dr Alexander Schuckert from ENS Paris. These natural processes rely on the interactions between many fundamental particles which made up the building blocks of life.

Quantum'Jamming' Could Help Unlock the Mysteries of Causality To keep communications secure in a post-quantum world, cryptographers are digging down into the concept of cause and effect. For the past few decades, researchers have understood that quantum computers should eventually be able to crack the widely used codes that secure much of the digital world. To protect against this fate, they've spent years developing new codes that appear to be safe from future safecrackers armed with quantum computers. At the same time, they've also devised ingenious ways to use the rules of quantum mechanics to keep communications secure. But quantum mechanics, just like the "classical" mechanics that preceded it, is just a theory of nature.