中國科學(xué)家剛剛將量子記憶糾纏了50多公里

中國科學(xué)家剛剛將量子記憶糾纏了50多公里

Scientists have managed to get two quantum memories entangled over 50 kilometres (31 miles) of fibre optic cables, almost 40 times the previous record.

科學(xué)家們成功地使兩個(gè)量子記憶纏結(jié)在50公里(31英里)長的光纖電纜上，幾乎是之前記錄的40倍。

This achievement makes the idea of a super-fast, super-secure quantum internet a much more plausible one.

這一成就使得超快、超安全的量子互聯(lián)網(wǎng)的想法更加可信。

Quantum communication relies on quantum entanglement, or what Einstein called 'spooky action at a distance': where two particles become inextricably linked and reliant on each other, even if they're not in the same place.

量子通信依賴于量子糾纏，即愛因斯坦所說的“鬼魅般的遠(yuǎn)距離作用”：兩個(gè)粒子不可避免地聯(lián)系在一起，相互依賴，即使它們不在同一個(gè)地方。

Quantum memory is the quantum equivalent of classical computing memory – the ability to store quantum information and keep it for a later time – and if we're going to get to the stage where quantum computers are actually practical and useful, getting this fixed memory working is an important part.

量子存儲(chǔ)器是經(jīng)典計(jì)算的等效量子記憶儲(chǔ)存量子信息的能力和保持它在稍后的時(shí)間,如果我們要到達(dá)階段,量子計(jì)算機(jī)實(shí)際上是實(shí)際的和有用的,得到這個(gè)固定的內(nèi)存工作的一個(gè)重要組成部分。

The main significance of this paper lies in extending the entangling distance in [optical] fibre between quantum memories to the city scale, team leader Jian-Wei Pan, of the University of Science and Technology of China, told the Australian Broadcasting Corporation.

“這篇論文的主要意義在于將量子記憶之間的光纖糾纏距離擴(kuò)展到城市規(guī)模。”中國科技大學(xué)的研究組組長潘建偉告訴澳大利亞廣播公司。Despite enormous progress, at present the maximal physical separation achieved between two nodes is 1.3 kilometres [0.8 miles], and challenges for longer distances remain, explain the researchers in their published paper.

研究人員在他們發(fā)表的論文中解釋道:“盡管取得了巨大的進(jìn)步，但目前兩個(gè)節(jié)點(diǎn)之間最大的物理距離是1.3公里(0.8英里)，更遠(yuǎn)距離的挑戰(zhàn)仍然存在。”

As far as communicating that data goes, quantum technology promises to improve transmission speeds and secure the data transfers using the laws of physics themselves – provided we can get it working in a reliable way over long distances.

就數(shù)據(jù)通信而言，量子技術(shù)承諾利用物理定律提高傳輸速度，保證數(shù)據(jù)傳輸?shù)陌踩?mdash;—前提是我們能讓它在長距離可靠地工作。

A quantum internet that connects remote quantum processors should enable a number of revolutionary applications such as distributed quantum computing, write the researchers in their published paper. "Its realisation will rely on entanglement of remote quantum memories over long distances."

研究人員在他們發(fā)表的論文中寫道:“一個(gè)連接遠(yuǎn)程量子處理器的量子互聯(lián)網(wǎng)應(yīng)該能夠?qū)崿F(xiàn)許多革命性的應(yīng)用，比如分布式量子計(jì)算。”“它的實(shí)現(xiàn)將依賴于遠(yuǎn)程量子記憶的糾纏。”

The research has been published in Nature.

這項(xiàng)研究發(fā)表在《自然》雜志上。