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Quantum device could complete 2.6 billion years of computation in 4 minutes

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Researchers demonstrated a Gaussian boson sampling system based on “beam splitters”. Beam splitters take the incoming photon stream from the laser beam and split it into two streams moving in different directions. Essentially, the system
is a linear optical quantum computer from a network of beamsplitters.

Beam splitter at 45 degree angle can be considered as a four-port device. If two identical photons hit the same beam splitter from two different ports, then both will come out of the same port. The paths of the photons become entangled. If a sufficiently large network of beamsplitters is constructed, then branched entangled states arise. The number of output states scales quickly with the number of inputs and beamsplitters.

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In the current demo, the researchers used 50 inputs and a chip with the equivalent of 300 beamsplitters. The total number of possible output states is about 1030.

In less than four minutes, the researchers obtained results that would take a fast classical computer about 2.5 billion years to calculate.

This was followed by rigorous tests to ensure that the behavior of the system was indeed quantum. If you calculate what will happen to specific input states and compare the output states with the results of those calculations, then the measurement results match the predictions. It is also possible to calculate the power output of the network if the light is not in a quantum state or if the photons are not identical and these measurements do not match predictions. This convincingly proves that the result is due to quantum effects.

One laser emits 25 beams of the same intensity, each of which is associated with two crystals, and the crystals generate single photons. The crystals are connected to optical fibers, the outputs of which are connected to a microcircuit where the beam splitters are located. Fiber outputs must be aligned with photodetectors. The entire installation covers an area of ​​about 1.5 x 2.5 m and must be stabilized with high accuracy (about 10 nm).

At the moment, quantum computers are composed of a chain of ions. The ions are spaced far enough apart that they can be accessed separately, which means that information (in the form of quantum bits or qubits) can be stored and read from individual atoms. Computational operations can be performed using microwaves and ion movement. Another variant of the architecture of quantum computers is superconducting rings cooled by liquid helium.

Each ring is a qubit that is connected to the others through wires. The advantage of this approach is that the hardware is relatively easy to scale. But the quantum behavior of each qubit is much easier to break.

In contrast to both of these options, an optical quantum computer can be a chip-scale device that is powered by an array of laser diodes, read out by a series of single-photon detectors. None of them require ultra-low temperatures or vacuum (if photon counting detectors are required, liquid nitrogen can be used). Optical quantum computing requires thermal stability and a fairly sophisticated feedback system to get the lasers to work exactly as they want them to.

Source: Arstechnica

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Uzbekistan allowed crypto-mining. But only for legal entities

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Uzbekistan allowed crypto mining But only for legal entities

Uzbekistan has allowed bitcoin mining, but only with the use of electricity “produced by a solar photovoltaic plant.” This follows from the order published on the portal for discussing draft regulatory legal acts.

Uzbekistan allowed crypto-mining.  But only for legal entities

The law specifies that Bitcoin miners will only have the status of legal entities, and they are also required to register with the local regulatory authority. At the same time, organizations must annually renew a certificate giving permission to engage in cryptocurrency mining activities.

In addition, the authorities have also banned the mining of “anonymous crypto-assets” – assets that operate on the principle of anonymity. However, which cryptocurrencies are classified as such, the law has not yet clarified.

Despite the legalization of mining, the mined cryptocurrency cannot be kept for resale in third-party markets. According to the order, the cryptocurrencies obtained during the mining “should be implemented by miners on the electronic platforms of providers.”

For the first time, Uzbekistan’s plans to legalize mining on solar energy became known back in early May. Then it was reported that the presidential decree eliminates the payment of income tax to mining companies that mine cryptocurrency using solar energy.

The decree stated that miners wishing to use grid electricity must pay double fees, with additional fees charged during periods of high demand. Those wishing to start mining in Uzbekistan must register with the Uzbek National Agency for Perspective Projects.

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1711 km on one tank, consumption of 3.2 liters of gasoline per 100 km, the second level of autonomy. GAC Yingku hybrid crossover presented in China

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1711 km on one tank consumption of 32 liters of

Another hybrid crossover, the GAC Yingku, has been announced in China. It differs from many models already on the market with a futuristic front design, the use of a 2.0 liter engine as part of the power plant (usually a 1.5 liter internal combustion engine is used) and, of course, autonomy. According to official data, this crossover is capable of driving 1711 km on one tank of gasoline, and the declared consumption is 3.2 liters of gasoline per 100 km.

1711 km on one tank, consumption of 3.2 liters of gasoline per 100 km, the second level of autonomy.  GAC Yingku hybrid crossover presented in China

While the capacity of the traction battery is not reported, there is no data on the electric motor. The developers only reported that the ICE of the 2.0-liter hybrid installation operates on the Atkinson economy cycle and is connected to the GMC 2.0 electromechanical transmission. GAC Yingku will also have pure petrol versions with 1.5 and 2.0 liter turbocharged engines. They will, of course, have less mileage on one tank of gasoline.

1711 km on one tank, consumption of 3.2 liters of gasoline per 100 km, the second level of autonomy.  GAC Yingku hybrid crossover presented in China

For GAC, Yingku will offer a system of intelligent driving assistants based on a Qualcomm Snapdragon 8155 single-chip system with 27 sensors and sensors. But only the second level of autonomy is declared, so you can count on a maximum of adaptive cruise control. But it is reported that there are eight parking modes – the car can park on its own at a distance of up to a kilometer.

1711 km on one tank, consumption of 3.2 liters of gasoline per 100 km, the second level of autonomy.  GAC Yingku hybrid crossover presented in China

The creators have not announced a production start date for the GAC Yingku, but it is expected to start production in the second half of this year. Prices, respectively, will be announced closer to the start of sales.

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Dimensity 8000, 4500mAh, 100W, 54MP, 12GB RAM, 512GB Flash for $655. In China, sales of the top version of Honor 70 Pro started

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Dimensity 8000 4500mAh 100W 54MP 12GB RAM 512GB Flash for

Smartphones Honor 70 and Honor 70 Pro debuted in China at the very end of May, and sales started about a week later. Now in the Celestial Empire, sales of the top version of Honor 70 Pro, equipped with 12 GB of RAM and 512 GB of flash memory, have begun. They are asking for the equivalent of $655.

Dimensity 8000, 4500mAh, 100W, 54MP, 12GB RAM, 512GB Flash for $655.  In China, sales of the top version of Honor 70 Pro started

The Honor 70 Pro features a 6.78-inch OLED screen with a resolution of 2652 x 1200 pixels and a 4500mAh battery with 100W charging support. At the heart of the hardware platform is the SoC MediaTek Dimensity 8000 with performance roughly on par with the Snapdragon 888.

Honor 70 Pro received a 50-megapixel front camera and a main one with sensors with a resolution of 54 (this is a Sony IMX800 with an optical format of 1 / 1.49 inches), 50 and 8 megapixels. The latter provides a 3x optical zoom.

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