atoms

Universal quantum computers promise to change the world. Now they are closer thanks to giant super atoms

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The prototypes of quantum computers currently manufactured by IBM, Honeywell or Google, among other companies, are engineering prodigies. However, they have defectswhich currently greatly limits the range of applications in which it is possible to use them. The most important of all of them is that they make mistakes and they are still not able to correct them effectively. Scientists are working on developing advanced error correction systems, and if they achieve their goal, universal quantum computers capable of dealing with a wide range of problems will arrive. The Achilles heel of current quantum machines is the extreme fragility of their qubits. And they are very sensitive to disturbances from the environment. Their interaction with the space around them can cause quantum information to be lost or altered, preventing them from delivering a correct result. This phenomenon is known as quantum decoherence and it has the ability to degrade the quantum states that need to be protected in order to carry out operations with qubits. Currently, researchers are making an enormous effort to design effective strategies for isolating qubits from the environment. However, efforts are also being made to develop less fragile qubits, and therefore less sensitive to noise. This is the plan that several scientists at Chalmers University of Technology in Sweden are working on. And they have developed a completely new quantum system designed to protect quantum information and minimize interference from the environment. Its purpose is, neither more nor less, to pave the way for universal quantum computers or large scale. Less decoherence leads to more robust and higher quality quantum computers Quantum computing experts maintain that quantum computers that will have the ability to correct their own errors can be used to design exotic materials, and probably also to develop new drugs and in industrial optimization problems, among other tasks. These are some of the applications that the qubits implemented with giant superatoms proposed by the Chalmers University of Technology team led by applied quantum physics professor Anton Frisk Kockum could put in our hands. Giant Superatoms explore two ideas long known to quantum physicists: giant atoms and superatoms. Giant Super Atoms explores two ideas long known to quantum physicists: giant atoms and superatoms. Unlike isolated atoms, a giant atom in this context is an artificial qubit designed to interact with its environment using light or sound waves at multiple physically separated points. This peculiarity allows them to protect quantum states more effectively than conventional systems, reduce decoherence and remember past interactions. The problem with using giant atoms in quantum computers is that they have significant limitations when trying to entangle them. Entanglement is essential in quantum computing because it allows multiple qubits to share a single quantum state and act as a coordinated system. To solve this limitation, the Chalmers researchers have combined giant atoms and superatoms. A superatom is made up of several natural atoms that share the same quantum state and behave collectively as a single larger atom. Lei Du, one of Chalmers’ researchers, explains to us what is a giant super atom: “We can observe it as multiple giant atoms working together as a single entity, allowing them to exhibit a non-local interaction between light and matter. This allows quantum information from multiple qubits stored and controlled as a unit and without the need for increasingly complex surrounding circuits.” For the moment, giant superatoms are a theoretical proposal, but Professor Anton Frisk Kockum and his team are going to try to build a quantum system using them. If they succeed, they could have found a new type of qubit that is much more robust, and, therefore, suitable for use in the development of universal quantum computers. Image | Generated by Xataka with Gemini More information | ScienceDaily In Xataka | We already know what the chips that will arrive until 2039 will be like. The machine that will allow them to be manufactured is close

China has a nuclear reactor 100 times more efficient than traditional ones. The trick is to shoot atoms with an accelerator

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China has had one goal in mind for some years: to have a voice in the nuclear race. In the weaponsyes, but also in energy. As Europe argues and the United States attempts to rejuvenate its critical infrastructure to meet AI needs, China has been on the accelerator for months. Recently they have not only approved 10 new reactorsbut they are one step away from turning on a new generation nuclear power plant to provide ‘green’ energy for 1,000 years. This is the CiADS system, or Throttle Actuated System. It is a type of reactor that China has been developing for more than 15 years and that promises to convert waste into energy. Their trick is to convert “garbage” into fuel, and it is a very interesting twist for nuclear energy. And even more so in a China that wants to dominate the atom and renewables as a basis for the development of another of the great ambitions of the country. Artificial intelligence. A twist to nuclear energy In a releasethe Institute of Modern Physics of the Chinese Academy of Sciences gave some details of how this accelerator-driven nuclear reactor works. Uranium is still the fuel, but “reactor driven by an accelerator” is literal. Using a particle accelerator, protons are “shot” at a heavy metal target at a speed of 0.8 times that of light. This generates neutrons that drive a reactor that operates somewhat below the critical threshold to be self-sustaining. The reactor generates energy and this violent reaction causes the long-lived radioactive isotopes that are normally generated in a conventional nuclear power plant to transmute and become materials with a shorter life. As its managers explain in SCMPthe CiADS is a hybrid between a nuclear reactor and a particle accelerator. The main advantage is that greatly reduces the risk of uncontrolled reactionsbut it has another: you can reuse the radioisotopes that normally would be treated as nuclear waste to continue producing energy. Firing beams of protons through these accelerators to bombard the heavy metal makes the uranium-238 give way to a new nuclear fuel: plutonium-239. According to the state media Science and Technology Daily, it is basically turning waste into treasures. According to those responsible, this method is 100 times more efficient than conventional fission and would allow nuclear energy to be converted into “a source of green, safe and stable energy for 1,000 years”, ensuring part of the necessary energy supply for the future. Furthermore, since what would previously be long-lasting waste is reused, the resulting CiADS has a useful life of less than one thousandth compared to conventional waste. The CiADS under construction They are two birds with one stone: China is wildly expanding its nuclear capacity, but it is estimated that it does not have as much uranium of its own and would continue to depend on imports… or to fish it in the sea. With “100 times more efficient” plants, you can get more juice out of what you have. And then there’s the fact that nuclear waste is less dangerous. If everything goes as planned, China will have its first MW-scale CiADS in 2027. It will be then when we check if those theoretical promises achieved by scale prototypes are fulfilled. The CiADS comes at a time when China has emerged as a contradiction in energy matters. They carry years fighting pollution and emissions, but they burn coal. They are a powerhouse in renewables with megastructures and deserts covered by panels. But in the age of AI, it is precisely that coal and gas that is the fuel that allows us to satisfy the demand of data centers at the peak of training. With nuclear weapons, China seeks further reduce your CO2 footprintbut ensuring a future in which it must feed the population, artificial intelligence and a network of technology companies that are doing the most difficult: fighting Western companies without the technological resources of the West. Because right now China doesn’t have the chips or the AI, but yes the energy. And that investment in new generation nuclear plants and, above all, in nuclear fusionrepresents the foundation of what is to come. Everything, that is, if the CiADS works as expected. Images | Sahaza Delis, Tighef In Xataka | There is a global race to be the first to reach nuclear fusion. And Germany just gave it an optimistic date

We have new evidence that there is a “dark atomic force” capable of “deforming” in the nucleus of atoms

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The atomic nucleus might seem well explored in an era in which scientists focus their efforts on better understanding quantum mechanics and interactions between subatomic particles that star in this science, such as Quarks or gluons. However, perhaps we still have much to learn about how the protons and neutrons that structure it are organized in this nucleus. New clues. A new study, led by PTB researchers (Physikalisch-Technische Bundesanstalt) German and the Max Planck Institute for Nuclear Physics (MPIK), He has revealed The existence of small “deformations” in the nucleus of atoms. This finding indicates the possible existence of a “dark atomic force” that governs interactions between neutrons and electrons within the atom. From dark matter to “dark force.” In 2020, a MIT team (Massachusetts Institute of Technology) observed something strange when comparing different isotopes of the ytterbiumelement number 70. The team examined changes in electronic resonance between isotopes of the element (different versions of an element that differ from each other in the number of neutrons) and ran into results that were not expected. That experiment could have been the first time that someone crossed with an still inexplicated phenomenon that some call “dark atomic force.” This means basically that we are facing an interaction between particles (in this case neutrons and electrons) still unexplored. A force in this sense analogous to the most studied “dark matter”, which only interacts with conventional matter through gravity. According to Explain the responsible team From the new study, there is the possibility that there are also “dark forces” that govern interactions between dark matter and conventional matter. In the same way, there is the possibility that these forces also affect matter within the same atoms. Measuring deformations. Finding these hypothetical interactions is not easy. To find its trail, the team responsible for the new study measured the frequencies in the atomic transition and the isotopic mass ratios between the different isotopes of the iterbio. Each of the two laboratories that led this research analyzed these changes using a different methodology, but in both cases these measurements involved much more precise measures than those carried out in previous experiments. The team thus confirm the existence of an anomaly in the observations. The details of the experiment and its results were published In an article In the magazine Physical Review Letters. From practice to theory. In its article, the team tried to theoretically base the anomaly observed in the experiments as a result of collaboration with researchers from the Technical University of Darmstadt and other institutions. These data, They explainthey also allowed to extract direct information on the deformation of the nucleus in the different isotopes of the iterbio. This way of “looking inside” atoms could help us acquire a totally new perspective in the analysis of the heavy atomic nuclei and in the “matter rich in neutrons.” This line of research could, for example, help us better understand the physics of the neutron starsbut also establish new paths of collaboration in the search for the long -awaited “new physics”, they add. In Xataka | Milestone in Quantum Physics: MIT has measured for the first time the geometry of electrons in the quantum world Image | MPIK / PTB / Brookhaven National Laboratory

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