One-Way Quantum Steering Evidence: Quantumness Experiments

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In summary, the article discusses the concept of one-way quantum steering, where entangled systems can influence each other in a directional way. This phenomenon has been previously demonstrated for Gaussian measurements, but this article proves and experimentally observes the one-way steerability of a more practical class of entangled states. This has both foundational significance and practical implications for quantum communication networks.
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I think this is the full article (and note PF member Howard Wiseman as one of the authors - please correct me if wrong about that) :

http://arxiv.org/abs/1511.01231

Sabine Wollmann, Nathan Walk, Adam J. Bennet, Howard M. Wiseman, G. J. Pryde

Within the hierarchy of inseparable quantum correlations, Einstein-Podolsky-Rosen steering is distinguished from both entanglement and Bell nonlocality by its asymmetry -- there exist conditions where the steering phenomenon changes from being observable to not observable, simply by exchanging the role of the two measuring parties. Whilst this one-way steering feature has been previously demonstrated for the restricted class of Gaussian measurements, for the general case of positive-operator-valued measures even its theoretical existence has only recently been settled. Here, we prove, and then experimentally observe, the one-way steerability of an experimentally practical class of entangled states in this general setting. As well as its foundational significance, the demonstration of fundamentally asymmetric nonlocality also has practical implications for the distribution of the trust in quantum communication networks.
 
  • #3
DrChinese said:
I think this is the full article
That is correct. The other article mentioned (Sun et al.) is also on arXiv: http://arxiv.org/abs/1511.01679
 

1. What is one-way quantum steering evidence?

One-way quantum steering evidence is a type of experiment that tests the phenomenon of quantum steering, which refers to the ability of one party to remotely control the state of another party's quantum system. In these experiments, one party (usually called the "steerer") performs measurements on their own quantum system, while the other party (the "receiver") measures the effects of those measurements on their own quantum system. The results of these measurements can provide evidence for the nonlocal correlations that exist between the two systems, known as quantum entanglement.

2. How is one-way quantum steering evidence different from other types of quantum experiments?

One-way quantum steering evidence experiments are different from other types of quantum experiments, such as Bell tests or entanglement swapping, in that they focus specifically on the one-way nature of quantum steering. These experiments aim to show that information can be transmitted between two systems in a nonlocal manner, without any physical interaction or communication between them.

3. What are some practical applications of one-way quantum steering evidence?

There are several potential practical applications of one-way quantum steering evidence. One potential use is in secure communication, as quantum steering could potentially be used to establish a secure quantum channel between two parties. Additionally, this type of evidence could be used to demonstrate the nonlocal nature of quantum entanglement, which is a key concept in quantum computing and other quantum technologies.

4. What are the challenges in conducting one-way quantum steering evidence experiments?

One challenge in conducting one-way quantum steering evidence experiments is the need for precise and sophisticated measurement techniques. These experiments require highly sensitive detectors and precise control over the quantum systems involved. Additionally, the systems must be isolated from external influences to prevent any potential sources of noise or error.

5. How does one-way quantum steering evidence impact our understanding of quantum mechanics?

One-way quantum steering evidence experiments provide further evidence for the nonlocal nature of quantum mechanics, which challenges our classical understanding of cause and effect. These experiments help to demonstrate the unique properties of quantum systems and the potential for nonlocal interactions between them. They also provide insights into the concept of entanglement, which is a fundamental aspect of quantum mechanics.

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