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A team from Griffith's Centre for QuantumDynamics in Australia have demonstrated how to rigorously test if pairs ofphotons - particles of light - display Einstein's "spooky action at adistance", even under adverse conditions that mimic those outside the lab.

来自澳大利亚格里菲斯量子动力学中心的一个研究小组展示了如何严格测试一对光子，即光子粒子，即使在模拟实验室之外的不利条件下是否能够展现爱因斯坦的“远距离幽灵行动”。

They demonstrated that the effect, alsoknown as quantum nonlocality, can still be verified even when many ofthe photons are lost by absorption or scattering as they travel from source todestination through an optical fiber channel. The experimental study andtechniques are published in the journal ScienceAdvances.

他们证明了这种量子非局域性效应，即使当许多光子经由光纤通道从源到目的地被吸收或散射损失时，仍可被验证。实验研究和技术发表在《Science Advances》杂志上。

Quantum nonlocality is important in thedevelopment of new global quantum information networks, which will have transmissionsecurity guaranteed by the laws of physics. These are the networks wherepowerful quantum computers can be linked.

量子非局域性对于新的全球量子信息网络的发展具有重要意义，量子信息网络具有物理定律所保证的传输安全性。这些网络可以连接强大的量子计算机。

Photons can be used to form a quantum linkbetween two locations by making a pair of photons that are"entangled" - so that measuring one determines the properties of itstwin - and then sending one along a communication channel.

通过制造一对“纠缠”光子，可以在它们两个位置之间形成一个量子链，这样测量一个就决定了另一个的性质，然后沿通信信道发送一个光子。

Team leader Professor Geoff Pryde said aquantum link had to pass a demanding test that confirmed the presence ofquantum nonlocality between particles at either end.

团队负责人Geoff Pryde教授表示，量子链必须通过证明两端粒子之间存在量子非局域性的严格的测试。

"Failing the test means aneavesdropper might be infiltrating the network," he said.

他说：“未通过测试意味着窃听者可能正在潜入网络。”

"As the length of quantum channelgrows, less and less photons successfully pass through the link, because nomaterial is perfectly transparent and absorption and scattering take theirtoll.

“随着量子通道长度的增长，越来越少的光子能成功通过量子链，因为没有材料完全透明，吸收和散射对它们造成了损害。”

"This is a problem for existingquantum nonlocality verification techniques with photons. Every photon lostmakes it easier for the eavesdropper to break the security by mimickingentanglement."

“使用光子进行量子非局域性验证技术现在是一个难题，每一个光子丢失都会使窃听者更容易通过模仿纠缠来威胁安全。”

Developing a method to test entanglementin presence of loss has been an outstanding challenge for the scientificcommunity for quite some time.

在相当长时间的一段时间内，开发出在有损失情况下测试纠缠的方法对科学界一直是一个突出的挑战。

The team used a different approach -quantum teleportation - to overcome the problem of lost photons.

该小组采用了一种不同的方法——量子隐形传态方法来克服光子丢失的问题。

Dr Morgan Weston, first author of thestudy, said they selected the few photons that survived the high-loss channeland teleported those lucky photons into another clean and efficient, quantum channel.

这项研究的第一作者摩根·韦斯顿（Morgan Weston）博士说，他们选择了在高损失频道中幸存的少量光子，并将这些幸运光子传送到另一个清洁高效的量子信道。

"There, the chosen verification test,called quantum steering, could be done without any problem," she said.

她说：“我们选择的验证测试被称为量子转向，能够顺利的完成测试。”

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