Network Quantum Steering
- URL: http://arxiv.org/abs/2106.04482v2
- Date: Mon, 8 Nov 2021 15:39:03 GMT
- Title: Network Quantum Steering
- Authors: Benjamin D.M. Jones, Ivan \v{S}upi\'c, Roope Uola, Nicolas Brunner and
Paul Skrzypczyk
- Abstract summary: We show how Bell nonlocality and quantum steering can be used to demonstrate network steering.
We also show that it is a genuinely novel effect, by exhibiting unsteerable states that nevertheless demonstrate network steering.
On the other hand, we provide no-go results for network steering in a large class of scenarios, by explicitly constructing NLHS models.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: The development of large-scale quantum networks promises to bring a multitude
of technological applications as well as shed light on foundational topics,
such as quantum nonlocality. It is particularly interesting to consider
scenarios where sources within the network are statistically independent, which
leads to so-called network nonlocality, even when parties perform fixed
measurements. Here we promote certain parties to be trusted and introduce the
notion of network steering and network local hidden state (NLHS) models within
this paradigm of independent sources. In one direction, we show how results
from Bell nonlocality and quantum steering can be used to demonstrate network
steering. We further show that it is a genuinely novel effect, by exhibiting
unsteerable states that nevertheless demonstrate network steering, based upon
entanglement swapping, yielding a form of activation. On the other hand, we
provide no-go results for network steering in a large class of scenarios, by
explicitly constructing NLHS models.
Related papers
- Experimental quantum triangle network nonlocality with an AlGaAs multiplexed entangled photon source [0.9092013845117769]
We show that quantum nonlocality without inputs can be demonstrated for sources with an arbitrarily small level of independence.
We use a simulated triangle network to violate experimentally for the first time a Bell-like inequality.
Our results allow us to deepen our understanding of network nonlocality while also pushing its practical relevance for quantum communication networks.
arXiv Detail & Related papers (2024-10-09T13:21:11Z) - Topologically Robust Quantum Network Nonlocality [0.41942958779358674]
We discuss quantum network Bell nonlocality in a setting where the network structure is not fully known.
In particular, we show that in a large ring network, the knowledge of only a small part of the network structure is enough to guarantee nonlocality over the entire network.
This shows that quantum network nonlocality can be extremely robust to changes in the network topology.
arXiv Detail & Related papers (2024-06-13T18:01:50Z) - Measurement dependence can enhance security in a quantum network [0.0]
Quantum networks have the potential to bring a lot of technological applications in sevaral quantum information processing tasks.
Here, we are focusing on how the role of the independence of the measurement choices of the end parties in a network works and can be used to enhance the security in a quantum network.
arXiv Detail & Related papers (2024-05-20T21:19:18Z) - Guarantees on the structure of experimental quantum networks [105.13377158844727]
Quantum networks connect and supply a large number of nodes with multi-party quantum resources for secure communication, networked quantum computing and distributed sensing.
As these networks grow in size, certification tools will be required to answer questions regarding their properties.
We demonstrate a general method to guarantee that certain correlations cannot be generated in a given quantum network.
arXiv Detail & Related papers (2024-03-04T19:00:00Z) - Detection of Network and Genuine Network Quantum Steering [7.871322835493703]
We show that our criteria can detect more quantum network steering than that from the violation of the n-locality quantum networks.
It is shown that biseparable assemblages can demonstrate genuine network steering in the star network configurations.
arXiv Detail & Related papers (2023-12-10T05:29:52Z) - Entanglement-Assisted Quantum Networks: Mechanics, Enabling
Technologies, Challenges, and Research Directions [66.27337498864556]
This paper presents a comprehensive survey of entanglement-assisted quantum networks.
It provides a detailed overview of the network structure, working principles, and development stages.
It also emphasizes open research directions, including architecture design, entanglement-based network issues, and standardization.
arXiv Detail & Related papers (2023-07-24T02:48:22Z) - Entangled Pair Resource Allocation under Uncertain Fidelity Requirements [59.83361663430336]
In quantum networks, effective entanglement routing facilitates communication between quantum source and quantum destination nodes.
We propose a resource allocation model for entangled pairs and an entanglement routing model with a fidelity guarantee.
Our proposed model can reduce the total cost by at least 20% compared to the baseline model.
arXiv Detail & Related papers (2023-04-10T07:16:51Z) - Certification of non-classicality in all links of a photonic star
network without assuming quantum mechanics [52.95080735625503]
Full network nonlocality goes beyond standard nonlocality in networks by falsifying any model in which at least one source is classical.
We report on the observation of full network nonlocality in a star-shaped network featuring three independent sources of photonic qubits and joint three-qubit entanglement-swapping measurements.
arXiv Detail & Related papers (2022-12-19T19:00:01Z) - A scheme for multipartite entanglement distribution via separable
carriers [68.8204255655161]
We develop a strategy for entanglement distribution via separable carriers that can be applied to any number of network nodes.
We show that our protocol results in multipartite entanglement, while the carrier mediating the process is always in a separable state with respect to the network.
arXiv Detail & Related papers (2022-06-20T10:50:45Z) - Genuine network quantum nonlocality and self-testing [0.0]
We define a notion of genuine network quantum nonlocality.
We show several examples of correlations that are genuine network nonlocal.
In particular, we present an example of quantum self-testing which relies on the network structure.
arXiv Detail & Related papers (2021-05-26T06:05:22Z) - Full network nonlocality [68.8204255655161]
We introduce the concept of full network nonlocality, which describes correlations that necessitate all links in a network to distribute nonlocal resources.
We show that the most well-known network Bell test does not witness full network nonlocality.
More generally, we point out that established methods for analysing local and theory-independent correlations in networks can be combined in order to deduce sufficient conditions for full network nonlocality.
arXiv Detail & Related papers (2021-05-19T18:00:02Z)
This list is automatically generated from the titles and abstracts of the papers in this site.
This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.