scholarly journals THE QUANTUM STATE OF INFRASTRUCTURE RECONFIGURATION IN 5G

2021 ◽  
Author(s):  
Niels Ten Oever
Keyword(s):  
Social Science ◽  
Communication Networks ◽  
Quantum State ◽  
Science And Technology Studies ◽  
Thought Experiment ◽  
Information Networks ◽  
5G Networks ◽  
Quantum Superposition ◽  
Apparent Paradox ◽  
Private Corporations

Transnational information networks are a proxy for power that embody visions of futures and possibilities (Mosco 2005; DeNardis 2020). This paper looks at the topological reconfiguration of networks that comes with the development and deployment of 5G technologies. The paper argues that 5G networks exist in an apparent paradox of quantum superposition: the networks are controlled both by states and private corporations, and the intelligence is located both in the end-points as well as in the network. But just like in the thought experiment of Schrödinger's cat, if one would observe the networks in case of an incident, the control over the network resides inside the network and with the state. However, this would merely describe the topographic qualities of the network, not its topological configuration. I use the concept of a quantum state that originates in physics, but is readily used in quantum social science (ie Barad 2007; Der Derian and Wendt 2020), to explain how, in the development of the topology of 5G networks, several ‘states’ that seem exclusionary occur simultaneously. This approach helps to explore how the creation of material possibilities in transnational information networks is entangled with transnational institutions, markets, and nation-states. Through this contribution, I seek to build a bridge between constructivist and realist traditions in international relations by using approaches from quantum social science and science and technology studies to increase understanding of the role of communication networks in tussles for power.

scholarly journals Hayden-Preskill decoding from noisy Hawking radiation

2021 ◽  
Vol 2021 (2) ◽  
Author(s):  
Ning Bao ◽  
Yuta Kikuchi
Keyword(s):  
Black Hole ◽  
Quantum State ◽  
Hawking Radiation ◽  
Thought Experiment ◽  
Natural Question ◽  
Early Radiation

Abstract In the Hayden-Preskill thought experiment, the Hawking radiation emitted before a quantum state is thrown into the black hole is used along with the radiation collected later for the purpose of decoding the quantum state. A natural question is how the recoverability is affected if the stored early radiation is damaged or subject to decoherence, and/or the decoding protocol is imperfectly performed. We study the recoverability in the thought experiment in the presence of decoherence or noise in the storage of early radiation.

scholarly journals Deterministic quantum teleportation through fiber channels

2018 ◽  
Vol 4 (10) ◽  
pp. eaas9401 ◽  
Author(s):  
Meiru Huo ◽  
Jiliang Qin ◽  
Jialin Cheng ◽  
Zhihui Yan ◽  
Zhongzhong Qin ◽  
...  
Keyword(s):  
Communication Networks ◽  
Quantum State ◽  
Optical Fibers ◽  
Quantum Teleportation ◽  
Continuous Variable ◽  
Entangled State ◽  
Optical Modes ◽  
Unknown Quantum State ◽  
Einstein Podolsky Rosen ◽  
Fiber Channels

Quantum teleportation, which is the transfer of an unknown quantum state from one station to another over a certain distance with the help of nonlocal entanglement shared by a sender and a receiver, has been widely used as a fundamental element in quantum communication and quantum computation. Optical fibers are crucial information channels, but teleportation of continuous variable optical modes through fibers has not been realized so far. Here, we experimentally demonstrate deterministic quantum teleportation of an optical coherent state through fiber channels. Two sub-modes of an Einstein-Podolsky-Rosen entangled state are distributed to a sender and a receiver through a 3.0-km fiber, which acts as a quantum resource. The deterministic teleportation of optical modes over a fiber channel of 6.0 km is realized. A fidelity of 0.62 ± 0.03 is achieved for the retrieved quantum state, which breaks through the classical limit of1/2. Our work provides a feasible scheme to implement deterministic quantum teleportation in communication networks.

scholarly journals POVMs are equivalent to projections for perfect state exclusion of three pure states in three dimensions

Quantum ◽  
2019 ◽  
Vol 3 ◽  
pp. 117 ◽  
Author(s):  
Abel Molina
Keyword(s):  
Quantum State ◽  
Thought Experiment ◽  
Three Dimensions ◽  
Perfect State ◽  
Symmetry Properties ◽  
Convexity Rank ◽  
Analytical Proof ◽  
Pure States ◽  
Quadratically Constrained ◽  
Projective Measurements

Performing perfect/conclusive quantum state exclusion means to be able to discard with certainty at least one out ofnpossible quantum state preparations by performing a measurement of the resulting state. This task of state exclusion has recently been studied at length in \cite{bandyopadhyay2014conclusive}, and it is at the heart of the celebrated PBR thought experiment \cite{pusey2012reality}. When all the preparations correspond to pure states and there are no more of them than their common dimension, it is an open problem whether POVMs give any additional power for this task with respect to projective measurements. This is the case even for the simple case of three states in three dimensions, which is mentioned in \cite{caves2002conditions} as unsuccessfully tackled. In this paper, we give an analytical proof that in this case considering POVMs does indeed not give any additional power with respect to projective measurements. To do so, we first make without loss of generality some assumptions about the structure of an optimal POVM. The justification of these assumptions involves arguments based on convexity, rank and symmetry properties. We show then that any pure states perfectly excluded by such a POVM meet the conditions identified in \cite{caves2002conditions} for perfect exclusion by a projective measurement of three pure states in three dimensions. We also discuss possible generalizations of our work, including an application of Quadratically Constrained Quadratic Programming that might be of special interest.

scholarly journals Quantum networks based on cavity QED

2001 ◽  
Vol 1 (Special) ◽  
pp. 7-12
Author(s):  
H. Mabuchi ◽  
M. Armen ◽  
B. Lev ◽  
M. Loncar ◽  
J. Vuckovic ◽  
...  
Keyword(s):  
Communication Networks ◽  
Quantum State ◽  
Interdisciplinary Research ◽  
Cavity Qed ◽  
Quantum Communication ◽  
Trapped Atoms ◽  
Quantum Networks ◽  
Internal States ◽  
Optical Photons ◽  
Photonic Bandgap Structures

We review an ongoing program of interdisciplinary research aimed at developing hardware and protocols for quantum communication networks. Our primary experimental goals are to demonstrate quantum state mapping from storage/processing media (internal states of trapped atoms) to transmission media (optical photons), and to investigate a nanotechnology paradigm for cavity QED that would involve the integration of magnetic microtraps with photonic bandgap structures.

scholarly journals Recovering critique in an age of datafication

2020 ◽  
Vol 22 (7) ◽  
pp. 1135-1151
Author(s):  
Nick Couldry
Keyword(s):  
Social Science ◽  
Social Theory ◽  
Network Theory ◽  
Social Order ◽  
Science And Technology Studies ◽  
Final Section ◽  
Actor Network Theory ◽  
Social World ◽  
The Social ◽  
Key Questions

This article starts out from the need for critical work on processes of datafication and their consequences for the constitution of social knowledge and the social world. Current social science work on datafication has been greatly shaped by the theoretical approach of Bruno Latour, as reflected in the work of Actor Network Theory and Science and Technology Studies (ANT/STS). The article asks whether this approach, given its philosophical underpinnings, provides sufficient resources for the critical work that is required in relation to datafication. Drawing on Latour’s own reflections about the flatness of the social, it concludes that it does not, since key questions, in particular about the nature of social order cannot be asked or answered within ANT. In the article’s final section, three approaches from earlier social theory are considered as possible supplements to ANT/STS for a social science serious about addressing the challenges that datafication poses for society.

scholarly journals Network Threats Mitigation Using Software-Defined Networking for the 5G Internet of Radio Light System

2019 ◽  
Vol 2019 ◽  
pp. 1-22 ◽  
Author(s):  
Krzysztof Cabaj ◽  
Marcin Gregorczyk ◽  
Wojciech Mazurczyk ◽  
Piotr Nowakowski ◽  
Piotr Żórawski
Keyword(s):  
Communication Networks ◽  
Denial Of Service ◽  
Experimental Results ◽  
The Internet ◽  
5G Networks ◽  
Security Framework ◽  
High Quality ◽  
User Experiences ◽  
Wide Range ◽  
Near Future

Currently 5G communication networks are envisioned to offer in a near future a wide range of high-quality services and unfaltering user experiences. In order to achieve this, several issues including security, privacy, and trust aspects need to be solved so that the 5G networks can be widely welcomed and accepted. Considering above, in this paper, we take a step towards these requirements by proposing a dedicated SDN-based integrated security framework for the Internet of Radio Light (IoRL) system that is following 5G architecture design. In particular, we present how TCP SYN-based scanning activities and DHCP-related network threats like Denial of Service (DoS), traffic eavesdropping, etc. can be detected and mitigated using such an approach. Enclosed experimental results prove that the proposed security framework is effective and efficient and thus can be considered as a promising defensive solution.

Thickening Transregionalism: Historical Formations of Science, Technology, and Medicine in Southeast Asia

2018 ◽  
Vol 12 (4) ◽  
pp. 503-518 ◽  
Author(s):  
Warwick Anderson
Keyword(s):  
Social Science ◽  
Southeast Asia ◽  
Intellectual History ◽  
History Of Science ◽  
Science And Technology Studies ◽  
Science And Technology ◽  
Thought Style ◽  
Technology Studies ◽  
Science Technology ◽  
History Of

AbstractThis article offers an overview of science and technology studies (STS) in Southeast Asia, focusing particularly on historical formations of science, technology, and medicine in the region, loosely defined, though research using social science approaches comes within its scope. I ask whether we are fashioning an “autonomous” history of science in Southeast Asia—and whether this would be enough. Perhaps we need to explore further “Southeast Asia as method,” a thought style heralded here though remaining, I hope, productively ambiguous. This review contributes primarily to the development of postcolonial intellectual history in Southeast Asia and secondarily to our understanding of the globalization and embedding of science, technology, and medicine.

Time, Topology, and the Twin Paradox

2011 ◽  
Author(s):  
Jean‐Pierre Luminet
Keyword(s):  
High Speed ◽  
Reference Frames ◽  
Thought Experiment ◽  
Flat Space ◽  
Space Time ◽  
Twin Paradox ◽  
Theory Of Relativity ◽  
Apparent Paradox ◽  
Curved Space ◽  
Gravitational Fields

This chapter notes that the twin paradox is the best-known thought experiment associated with Einstein's theory of relativity. An astronaut who makes a journey into space in a high-speed rocket will return home to find he has aged less than his twin who stayed on Earth. This result appears puzzling, as the homebody twin can be considered to have done the travelling with respect to the traveller. Hence, it is called a “paradox”. In fact, there is no contradiction, and the apparent paradox has a simple resolution in special relativity with infinite flat space. In general relativity (dealing with gravitational fields and curved space-time), or in a compact space such as the hypersphere or a multiply connected finite space, the paradox is more complicated, but its resolution provides new insights about the structure of space–time and the limitations of the equivalence between inertial reference frames.

COLLAPSE AND REVIVAL EFFECT IN A MESOSCOPIC LC CIRCUIT

2004 ◽  
Vol 18 (08) ◽  
pp. 1217-1224 ◽  
Author(s):  
HAI-MEI LUO ◽  
YING-HUA JI ◽  
JIE LIU
Keyword(s):  
Time Evolution ◽  
Dynamic Behavior ◽  
Quantum State ◽  
Tunnel Junction ◽  
Coherent States ◽  
The State ◽  
Quantum States ◽  
Quantum Superposition ◽  
Coupling Energy ◽  
Lc Circuit

This paper studied the time evolution of quantum state in a mesoscopic LC circuit with the coupling energy caused by mesoscopic capacitor acting as a tunnel junction. It indicates that the state of the junction evolves into the quantum superposition of two coherent states and, in the state, nonclassical squeezing properties of the circuit appear. It also indicates that the dynamic behavior of the current shows collapse and revival phenomenon. The research in the paper will be helpful to miniaturize integrate circuits and electric components. It will be also important for the utilization of mesoscopic circuits to evolve the quantum states, which work as information carriers.

Graph Colorings Applied in Scale-Free Networks

2013 ◽  
Vol 760-762 ◽  
pp. 2199-2204 ◽  
Author(s):  
Chao Yang ◽  
Bing Yao ◽  
Hong Yu Wang ◽  
Xiang'en Chen ◽  
Si Hua Yang
Keyword(s):  
Communication Networks ◽  
Information Networks ◽  
Chromatic Numbers ◽  
Graph Colorings ◽  
Graph Models ◽  
Important Method ◽  
Scale Free ◽  
Scale Free Networks ◽  
As Graph

Building up graph models to simulate scale-free networks is an important method since graphs have been used in researching scale-free networks and communication networks, such as graph colorings can be used for distinguishing objects of communication and information networks. In this paper we determine the avdtc chromatic numbers of some models related with researching networks.

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