Individual light particles. I ll explain why that s important in a second, but first, here s how they do it. On this disc here, you can t see it, is a crystal that is one atom thick and it s got little defects on it the size of an atom, and when you fire a laser at those defects, they ping out individual out individual photons, individual particles of light, and you can actually see them here. These bright yellow areas are the defects where the photons are coming out. This is where it gets weird. By singling out photons, you can unlock what s known as the quantum world, where very, very small things behave very differently. You ll need to pay attention to this bit. So, there are two main properties that we can harness. The first one is superposition and the second one is entanglement. Superposition is a particle being in two states at the same time, so being up and down at the same time. Entanglement is two particles being inextricably linked, so no matter where they are in the univers
Now on bbc news, this week s travel show comes from tokyo where carmen roberts looks back at some of her favourite recent stories from japan. Coming up on this week s show, we are approaching the first rapid and it s meant to be this deepest and most exciting. And that said? i do feel ninja like here. Hello and welcome to the travel show. Coming to you this week from tokyo, a city that has been my home for a little over seven years, and where the big talking point is whether this summer s olympic games will definitely go ahead, and if they do, what form will they take? it was back at the end of march last year that the ioc and the japanese authorities decided to postpone the tokyo olympic and paralympic games, which were due to kick off with a spectacular opening ceremony in the capital s new national stadium on the 23rd ofjuly 2020. Since then, japan and the rest of the world have been through a series of lockdowns, and most countries still have international travel restrictions in pl
Mass is threatening it has huge stockpiles of metal is that it could continue to launch attacks on israel for months to come. That is why israel is particularly, going after rocket launch sites and after places where missiles would be stored as well as some of the commanders that are crucial to the rocket programme. Thank you very much indeed. Now we will get a look at the weather forecast for you. Good afternoon. Well, it is one of those weekends where you ve got sunglasses on one minute and you are umbrella ing up for the next minute, and we are going to continue with that theme for the rest of the weekend. So some heavy downpours around, some sunshine in between the showers and things are staying pretty cool for the middle of may. So the most frequent heavy showers for the rest of today will be for south west england, the midlands and wales also seeing some hail and storms next. Then, as those showers head gradually northwards, easing for most of us overnight, largely clear skies fo
the household energy supplier octopus is to buy its competitor bulb the largest energy company to collapse last year, amid soaring wholesale gas and electricity prices. since then, the government has spent billions of pounds keeping bulb afloat. but now, octopus has agreed a deal to take on the company s 1.5 million customers. our business reporter, ramzan kamali, has the details. the energy market was in disarray this time last year, dozens of firms going bust as energy prices soared. the regulator, ofjam, increased regulator, of jam, increased what regulator, ofjam, increased what was then known as the energy price cap, the biggest victim bulb, putting on a special administration, kept going by huge government bailout. today octopus are confident the takeover of bulb s customers would be smooth. . , bulb s customers would be smooth. , ., bulb s customers would be smooth. , smooth. octopus has a good track record smooth. octopus has a good track record of smooth. octop
scattered showers. more details coming up shortly. it s sunday 30th october. our main story: a period of national mourning has been announced in south korea, after at least 151 people died in a stampede in the capital, seoul. dozens more were injured during halloween celebrations which were taking place in a popular nightlife district. helena wilkinson reports. it began as a night of celebration, young people enjoying themselves in a popular nightlife area. 0h, young people enjoying themselves in a popular nightlife area. oh, my god. then these, panic, horror, chaos. the scene after the deadly crush was shocking. not in view into these pictures but elsewhere, there were rows of bodies. some were carried into ambulances. cpr was performed on those under the ground for so many nothing could be done. 0fficial for so many nothing could be done. official said most victims were in their teens and 20s. translation: these 21 year old is watched emergency services treat the many injur