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Russian Scientists Use Supercomputer To Probe Limits of Google’s Quantum Processor

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4 years ago

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Russian Scientists Use Supercomputer To Probe Limits of Google’s Quantum Processor

CPQM’s quantum information processing laboratory collaborated with the CDISE supercomputing team “Zhores” to simulate Google’s quantum processor. By reproducing noise-free data based on the same statistics as Google’s recent experiments, the team was able to point out the subtle effects lurking in Google’s data. This effect is called an accessibility defect and was discovered by the Skoltech team in past work. The numbers confirm that Google’s data is on the edge of the so-called density-dependent avalanche, which means that future experiments will require more quantum resources to perform quantum approximation optimization. The results were published in the leading journal “Quantum” in the field. From the early days of numerical calculations, quantum systems have become extremely difficult to simulate, although the exact reason is still an active subject of research. Nevertheless, classical computers clearly have inherent difficulties in simulating quantum systems, which prompted several researchers to change their views. Scientists such as Richard Feynman and Yuri Manin speculated in the early 1980s that the unknown components that seemed to make quantum computers difficult to simulate with classical computers could themselves be used as computing resources. For example, quantum processors should be good at simulating quantum systems because they are governed by the same basic principles. This early idea eventually led Google and other tech giants to create prototype versions of the long-awaited quantum processors. These modern devices are prone to errors, they can only execute the simplest quantum programs, and each calculation must be repeated many times to average the error to finally form an approximation. One of the most studied applications of these contemporary quantum processors is the quantum approximation optimization algorithm, or QAOA (pronounced “kyoo-ay-oh-AY”). In a series of dramatic experiments, Google used its processor to probe the performance of QAOA with 23 qubits and three adjustable program steps. In short, QAOA is a method designed to approximate the optimization problem of a hybrid setup composed of a classical computer and a quantum coprocessor. Prototype quantum processors such as Google’s Sycamore are currently limited to performing noisy and limited operations. Using hybrid settings, the hope is to alleviate some of these system limitations and still restore quantum behavior to take advantage of, making methods such as QAOA particularly attractive. Skoltech scientists have recently made a series of discoveries related to QAOA, for example, please refer to the article here. What stands out is the impact that fundamentally limits the applicability of QAOA. They show that the density of the optimization problem—that is, the ratio between its constraints and variables—is the main obstacle to achieving approximate solutions.

News Source : Sci Tech Daily

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YouTube

YouTube marks 20th anniversary by launching new useful features What’s new

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6 days ago

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April 24, 2025

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YouTube marks 20th anniversary by launching new useful features What’s new

YouTube has celebrated its 20th anniversary with several new features, including functional upgrades and new features for YouTube TV. The platform has introduced personalised radio stations via Ask Music, which is available to YouTube Premium and YouTube Music users on both iOS and Android devices. Additionally, YouTube is rolling out the ability to fast-forward.

YouTube TV members will gain the ability to build their own multiview experiences, starting with a selection of non-sports content from a small group of popular channels. The platform is introducing improved navigation, better playback quality, and easier access to features such as comments, channel information, and more through videos at 4x speed, providing more.

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  2. Unsubscribe from Unwanted Emails: Open a promotional email and click “Unsubscribe” at the bottom of the email to reduce future accumulation April 2025 — YouTube, the world’s largest video-sharing platform, is celebrating its 20th anniversary with the launch of several innovative features aimed at enhancing user experience, empowering creators, and embracing the future of digital content.

  3. 1. AI-Powered Video Summaries
    One of the most anticipated features is AI-generated video summaries, which will now appear below eligible videos. This allows viewers to preview content quickly and decide whether to watch the full video. The summaries are automatically created using advanced natural language processing and are designed to boost discoverability and engagement.

  4. 2. “Jump Ahead” Smart Chapters
    YouTube is introducing smart chapters with “Jump Ahead” capabilities, allowing viewers to skip to the most engaging parts of videos based on audience retention data. The feature leverages machine learning to identify sections that retain viewers the most and gives users a prompt to “Jump Ahead” with a single tap.

  5. 3. Creator Insights Dashboard Upgrade
    For content creators, YouTube has upgraded its Creator Studio Dashboard with enhanced real-time analytics, audience mood tracking, and AI-suggested titles and tags. The platform’s algorithms now offer dynamic suggestions for improving performance, personalized for each creator’s channel and content style.

  6. 4. YouTube Create App Expansion
    Following positive feedback from beta users, YouTube is officially rolling out the YouTube Create app in over 30 new countries. This free mobile video editing tool includes features like auto-captions, royalty-free music, filters, and multi-clip editing — giving creators more control without the need for expensive software.

  7. 5. Enhanced Live Shopping Tools
    With e-commerce booming, YouTube is expanding its Live Shopping tools, allowing creators to tag mini-social network within the platform. These tools are products, integrate affiliate links, and host shoppable livestreams with real-time viewer interaction. The new update supports multi-vendor support, making collaborations with brands smoother and more profitable.

  8. 6. Smart TV Upgrades
    YouTube is giving its TV interface a refresh, introducing a sleeker design with quicker access to playlists, subscriptions, and smart recommendations. A new “Ambient Mode interactive content suggestions and previews when the app is idle, turning the TV into a dynamic home hub for entertainment.

  9. 7. Community Tab Enhancements
    To improve engagement, YouTube is enhancing its Community Tab with interactive stickers, polls, countdowns, and quizzes — turning it into a mini-social network within the platform. These tools are aimed at helping creators keep their audience involved even between video uploads.
  • Group Media Publication
  1. Construction, Infrastructure and Mining   
  2. General News Platforms – IHTLive.com
  3. Entertainment News Platforms – https://anyflix.in/

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