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\"\"
<\/span><\/figcaption><\/figure>Google<\/a> scientists said they have passed a major milestone in their quest to develop effective quantum computing<\/a>, with a new study showing they reduced the rate of errors -- long an obstacle for the much-hyped technology.

Quantum<\/a> computing has been touted as a revolutionary advance that uses our growing scientific understanding of the subatomic world to create a machine with powers far beyond those of today's conventional computers.

However the technology remains largely theoretical, with many thorny problems still standing in the way -- including stubbornly high error rates.

In new research published in the journal Nature<\/a>, the Google Quantum AI lab<\/a> described a system that can significantly decrease the error rate.

That could give the US tech giant a step up on its rivals such as IBM<\/a>, which is also working on superconducting quantum processors.

While traditional computers process information in bits that can be represented by 0 or 1, quantum computers use qubits, which can be a combination of both at the same time.

This property, known as superposition, means that a quantum computer can crunch an enormous number of potential outcomes simultaneously.

The computers harness some of the most mind-boggling aspects of quantum mechanics<\/a>, including a phenomenon known as \"entanglement\" -- in which two members of a pair of bits can exist in a single state, even if far apart.

- 'Magic' -

But a problem called decoherence can cause the qubits to lose their information when they leave their quantum state and come into contact with the outside world.

This fragility causes high error rates, which also increase with the number of qubits, frustrating scientists wanting to ramp up their experiments.

However Google's team said it had demonstrated for the first time in practice that a system using error-correcting code can detect and fix errors without affecting the information.

The system was first theorised in the 1990s, however previous attempts had just thrown up more errors, not less, said Google's Hartmut Neven, a co-author of the study.

\"But if all components of your system have sufficiently low error rates, then the magic of quantum error correction kicks in,\" Neven told a press conference.

Julian Kelly<\/a>, another study co-author, hailed the development as \"a key scientific milestone\", saying that \"quantum error correction is the single most important technology for the future of quantum computing\".

Neven said the result was still \"not good enough, we need to get to an absolute low error rate\".

He added that \"there are more steps to come\" to achieve the dream of a useable quantum computer.

Google claimed in 2019 it had passed a milestone known as \"quantum supremacy\", when the tech giant said its Sycamore machine executed a calculation in 200 seconds that would have taken a conventional supercomputer 10,000 years to complete.

However the achievement has since been disputed, with Chinese researchers saying last year that a supercomputer could have beaten Sycamore's time.
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谷歌在量子计算称赞“重要里程碑”

量子计算被吹捧为一个革命性的进步,使用我们日益增长的科学理解亚原子世界的创建一个机与传统力量远远超过今天的电脑。

  • 2023年2月23日更新是31点
阅读: 100年行业专业人士
读者的形象读到100年行业专业人士
谷歌科学家们说他们已经通过了一项重要的里程碑在寻求有效的发展量子计算,一项新的研究显示他们减少的速度被大肆宣传的技术错误——长一个障碍。

量子计算已经被视为一个革命性的进步,使用我们日益增长的科学理解亚原子世界的创建一个机与传统力量远远超过今天的电脑。

然而这项技术仍然主要理论,许多棘手问题仍站在路上——包括居高不下的错误率。

在一项新的研究发表在杂志上自然,谷歌量子人工智能实验室描述一个系统,可以显著降低错误率。

广告
这可能给美国科技巨头加快等竞争对手IBM,这也是在超导量子处理器。

在传统计算机处理信息比特,可以表示为0或1,量子计算机利用量子位,两者的结合在同一时间。

这个属性,称为叠加,意味着量子计算机可以同时紧缩的一个巨大的数量的潜在结果。

计算机利用的一些最令人难以置信的方面量子力学,包括一个现象被称为“纠缠”——两个成员的一双可以存在于一个国家,即使远。

-‘魔法’

但是一个叫做退相干问题可以导致量子位失去信息当他们离开他们的量子态和接触到外面的世界。

这种脆弱性导致错误率高,与量子位的数量也增加,令人沮丧的科学家想要增加他们的实验。

然而谷歌团队表示,它已经在实践中首次证明使用纠错编码系统可以检测并修复错误而不影响的信息。

系统首先是理论上认为在1990年代,然而先前刚抛出更多的错误,而不是更少,Hartmut Neven谷歌说,该研究的作者之一。

广告
“但是如果你的系统的所有组件足够低错误率,然后神奇的量子纠错,”乃文的新闻发布会上说。

朱利安•凯利,另一个研究的合著者,将开发誉为“关键科学里程碑”,说“量子纠错是最重要的一个技术对量子计算的未来”。

乃文说结果还“不够好,我们需要得到一个绝对的低出错率”。

他补充说,“有更多的步骤”来实现的梦想一个可用的量子计算机。

谷歌声称它在2019年通过了一个里程碑称为“量子霸权”,当执行科技巨头表示,其美国梧桐机在200秒计算,采取了传统的超级计算机10000年才能完成。

然而成就已经有争议,去年中国研究人员说,一台超级计算机可以击败了梧桐的时间。
  • 发布于2023年2月23日,在28点坚持啊
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\"\"
<\/span><\/figcaption><\/figure>Google<\/a> scientists said they have passed a major milestone in their quest to develop effective quantum computing<\/a>, with a new study showing they reduced the rate of errors -- long an obstacle for the much-hyped technology.

Quantum<\/a> computing has been touted as a revolutionary advance that uses our growing scientific understanding of the subatomic world to create a machine with powers far beyond those of today's conventional computers.

However the technology remains largely theoretical, with many thorny problems still standing in the way -- including stubbornly high error rates.

In new research published in the journal Nature<\/a>, the Google Quantum AI lab<\/a> described a system that can significantly decrease the error rate.

That could give the US tech giant a step up on its rivals such as IBM<\/a>, which is also working on superconducting quantum processors.

While traditional computers process information in bits that can be represented by 0 or 1, quantum computers use qubits, which can be a combination of both at the same time.

This property, known as superposition, means that a quantum computer can crunch an enormous number of potential outcomes simultaneously.

The computers harness some of the most mind-boggling aspects of quantum mechanics<\/a>, including a phenomenon known as \"entanglement\" -- in which two members of a pair of bits can exist in a single state, even if far apart.

- 'Magic' -

But a problem called decoherence can cause the qubits to lose their information when they leave their quantum state and come into contact with the outside world.

This fragility causes high error rates, which also increase with the number of qubits, frustrating scientists wanting to ramp up their experiments.

However Google's team said it had demonstrated for the first time in practice that a system using error-correcting code can detect and fix errors without affecting the information.

The system was first theorised in the 1990s, however previous attempts had just thrown up more errors, not less, said Google's Hartmut Neven, a co-author of the study.

\"But if all components of your system have sufficiently low error rates, then the magic of quantum error correction kicks in,\" Neven told a press conference.

Julian Kelly<\/a>, another study co-author, hailed the development as \"a key scientific milestone\", saying that \"quantum error correction is the single most important technology for the future of quantum computing\".

Neven said the result was still \"not good enough, we need to get to an absolute low error rate\".

He added that \"there are more steps to come\" to achieve the dream of a useable quantum computer.

Google claimed in 2019 it had passed a milestone known as \"quantum supremacy\", when the tech giant said its Sycamore machine executed a calculation in 200 seconds that would have taken a conventional supercomputer 10,000 years to complete.

However the achievement has since been disputed, with Chinese researchers saying last year that a supercomputer could have beaten Sycamore's time.
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