scholarly journals Macroscopic and deterministic quantum feature generation via phase basis quantization in a cascaded interferometric system

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Byoung S. Ham
Keyword(s):  
Information Science ◽  
Quantum Superposition ◽  
Entanglement Generation ◽  
Practical Applications ◽  
Classical Counterpart ◽  
Energy Quantization ◽  
Wave Nature ◽  
Macroscopic Entanglement ◽  
Complementarity Theory ◽  
Quantum Feature

AbstractQuantum entanglement is the quintessence of quantum information science governed by quantum superposition mostly limited to a microscopic regime. For practical applications, however, macroscopic entanglement has an essential benefit for quantum sensing and metrology to beat its classical counterpart. Recently, a coherence approach for entanglement generation has been proposed and demonstrated in a coupled interferometric system using classical laser light, where the quantum feature of entanglement has been achieved via phase basis superposition between identical interferometric systems. Such a coherence method is based on the wave nature of a photon without violating quantum mechanics under the complementarity theory. Here, a method of phase basis quantization via phase basis superposition is presented for macroscopic entanglement in an interferometric system, which is corresponding to the energy quantization of a photon.

scholarly journals Web Semântica no repositório BRAPCI

2016 ◽  
Vol 9 (2) ◽  
Author(s):  
Nátalia NAKANO ◽  
Talita Cristina da SILVA ◽  
Maria José Vicentini JORENTE ◽  
José Eduardo SANTARÉM SEGUNDO
Keyword(s):  
Semantic Web ◽  
Information Science ◽  
Research Problem ◽  
Human Knowledge ◽  
Practical Applications ◽  
The World ◽  
Working Together ◽  
The Subject ◽  
Web Research ◽  
Productive Authors

In 2001 Tim Berners-Lee revealed to the world what he wanted for the future of Web - man and machine working together to develop complex tasks, and that the Web could leverage the way human knowledge is acquired. Since then researchers from different fields of knowledge have engaged in scientific and empirical research to make this dream come true. In this context, the research problem of this article is established: What is the current situation of Semantic Web research in Brazil in Information Science? Who are the researchers of this theme in our country? What are the institutions that support these studies? The present study aimed at listing the most productive authors, institutions that support their research and the specific issues of their investigations. We conducted a literature review in Base de Dados Referencial de Artigos de Periódicos em Ciência da Informação (BRAPCI). We retrieved 41 articles, excluded five for not belonging to Brazilian authors and Brazilian institutions. From the analysis of this corpus, we realized the need to include additional keywords to better understanding of specific studies encompassed by the theme. Thus, we included the keywords: SPARQL, SKOS, RDF and ontology. It was concluded that the studies on the Semantic Web under the aegis of Information Science mostly perform theoretical and philosophical studies, while the computer science professionals seek practical applications of the topic. It was also concluded that a study including other databases could reveal other authors and institutions relevant to the subject of study.

scholarly journals State-independent contextuality in classical light

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Tao Li ◽  
Qiang Zeng ◽  
Xiong Zhang ◽  
Tian Chen ◽  
Xiangdong Zhang
Keyword(s):  
Degrees Of Freedom ◽  
Information Science ◽  
Quantum Systems ◽  
Optical Systems ◽  
Quantum Information Science ◽  
Independent Manner ◽  
Classical Counterpart ◽  
Information Processes ◽  
Fundamental Phenomenon ◽  
Application Prospects

AbstractState-independent contextuality is a fundamental phenomenon in quantum mechanics, which has been demonstrated experimentally in different systems in recent years. Here we show that such contextuality can also be simulated in classical optical systems. Using path and polarization degrees of freedom of classical optics fields, we have constructed the classical trit (cetrit), here the term ‘cetrit’ is the classical counterpart of a qutrit in quantum systems. Furthermore, in classical optical systems we have simulated the violations of several Yu-Oh-like noncontextual inequalities in a state-independent manner by implementing the projection measurements. Our results not only provide new physical insights into the contextuality and also show the application prospects of the concepts developed recently in quantum information science to classical optical systems and optical information processes.

scholarly journals Scaling, rotation, and channeling behavior of helical and skyrmion spin textures in thin films of Te-doped Cu2OSeO3

2020 ◽  
Vol 6 (13) ◽  
pp. eaax2138 ◽  
Author(s):  
M.-G. Han ◽  
J. A. Garlow ◽  
Y. Kharkov ◽  
L. Camacho ◽  
R. Rov ◽  
...  
Keyword(s):  
Thin Films ◽  
Precise Measurement ◽  
Information Science ◽  
Practical Applications ◽  
Phase Microscopy ◽  
Emergent Phenomena ◽  
Hall Effects ◽  
Anisotropic Scaling ◽  
Important Challenge

Topologically nontrivial spin textures such as vortices, skyrmions, and monopoles are promising candidates as information carriers for future quantum information science. Their controlled manipulation including creation and annihilation remains an important challenge toward practical applications and further exploration of their emergent phenomena. Here, we report controlled evolution of the helical and skyrmion phases in thin films of multiferroic Te-doped Cu2OSeO3 as a function of material thickness, dopant, temperature, and magnetic field using in situ Lorentz phase microscopy. We report two previously unknown phenomena in chiral spin textures in multiferroic Cu2OSeO3: anisotropic scaling and channeling with a fixed-Q state. The skyrmion channeling effectively suppresses the recently reported second skyrmion phase formation at low temperature. Our study provides a viable way toward controlled manipulation of skyrmion lattices, envisaging chirality-controlled skyrmion flow circuits and enabling precise measurement of emergent electromagnetic induction and topological Hall effects in skyrmion lattices.

scholarly journals Tutorial Notes on One-Party and Two-Party Gaussian States

2003 ◽  
Vol 01 (02) ◽  
pp. 153-188 ◽  
Author(s):  
Berthold-Georg Englert ◽  
Krzysztof Wódkiewicz
Keyword(s):  
Quantum Information ◽  
Phase Space ◽  
Characteristic Function ◽  
Information Science ◽  
Operator Method ◽  
Two Dimensional ◽  
Quantum Information Science ◽  
Gaussian States ◽  
One Dimensional ◽  
Practical Applications

Gaussian states — or, more generally, Gaussian operators — play an important role in Quantum Optics and Quantum Information Science, both in discussions about conceptual issues and in practical applications. We describe, in a tutorial manner, a systematic operator method for first characterizing such states and then investigating their properties. The central numerical quantities are the covariance matrix that specifies the characteristic function of the state, and the closely related matrices associated with Wigner's and Glauber's phase space functions. For pedagogical reasons, we restrict the discussion to one-dimensional and two-dimensional Gaussian states, for which we provide illustrating and instructive examples.

A Two-step Creation of Phonon Entanglement with Quantized Light

2021 ◽  
Vol 1 ◽  
Keyword(s):  
Phase Transitions ◽  
Quantum Information ◽  
Quantum Entanglement ◽  
Quantum Dynamics ◽  
Information Science ◽  
Quantum Information Science ◽  
Entanglement Generation

Dynamics of photoinduced quantum entanglement generation between phonons is theoretically revealed. The results contribute to the study of fundamental theoretical problems within quantum dynamics of photoinduced phase transitions and quantum information science.

scholarly journals Intensity correlation OCT is a classical mimic of quantum OCT providing up to twofold resolution improvement

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Sylwia M. Kolenderska ◽  
Piotr Kolenderski
Keyword(s):  
Axial Resolution ◽  
Intensity Correlation ◽  
Practical Applications ◽  
Classical Counterpart ◽  
Spectral Domain Oct ◽  
Resolution Improvement ◽  
Even Order ◽  
Oct Imaging ◽  
Quantum Optical ◽  
Sd Oct

AbstractQuantum Optical Coherence Tomography (Q-OCT) uses quantum properties of light to provide several advantages over its classical counterpart, OCT: it achieves a twice better axial resolution with the same spectral bandwidth and it is immune to even orders of dispersion. Since these features are very sought-after in OCT imaging, many hardware and software techniques have been created to mimic the quantum behaviour of light and achieve these features using traditional OCT systems. The most recent, purely algorithmic scheme—an improved version of Intensity Correlation Spectral Domain OCT named ICA-SD-OCT—showed even-order dispersion cancellation and reduction of artefacts. The true capabilities of this method were unfortunately severely undermined, both in terms of its relation to Q-OCT and its main performance parameters. In this work, we provide experimental demonstrations as well as numerical and analytical arguments to show that ICA-SD-OCT is a true classical equivalent of Q-OCT, more specifically its Fourier domain version, and therefore it enables a true two-fold axial resolution improvement. We believe that clarification of all the misconceptions about this very promising algorithm will highlight the great value of this method for OCT and consequently lead to its practical applications for resolution- and quality-enhanced OCT imaging.

Why Video Game Genres Fail

2015 ◽  
Vol 12 (5) ◽  
pp. 445-465 ◽  
Author(s):  
Rachel Ivy Clarke ◽  
Jin Ha Lee ◽  
Neils Clark
Keyword(s):  
Video Games ◽  
Video Game ◽  
Information Science ◽  
Game Studies ◽  
Classification Theory ◽  
Library And Information Science ◽  
Practical Applications ◽  
Genre Classification ◽  
Family Resemblances ◽  
Faceted Classification

This article explores the current affordances and limitations of video game genre from a library and information science perspective with an emphasis on classification theory. We identify and discuss various purposes of genre relating to video games, including identity, collocation and retrieval, commercial marketing, and educational instruction. Through the use of examples, we discuss the ways in which these purposes are supported by genre classification and conceptualization and the implications for video games. Suggestions for improved conceptualizations such as family resemblances, prototype theory, faceted classification, and appeal factors for video game genres are considered, with discussions of strengths and weaknesses. This analysis helps inform potential future practical applications for describing video games at cultural heritage institutions such as libraries, museums, and archives, as well as furthering the understanding of video game genre and genre classification for game studies at large.

scholarly journals Macroscopically entangled light fields

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Byoung S. Ham
Keyword(s):  
Random Phase ◽  
Phase Control ◽  
Light Fields ◽  
Wave Nature ◽  
Deterministic Control ◽  
Pair Generation ◽  
Novel Method ◽  
Phase Sensitive ◽  
Particle Nature ◽  
Quantum Feature

AbstractA novel method of macroscopically entangled light-pair generation is presented for a quantum laser using randomness-based deterministic phase control of coherent light in a coupled Mach–Zehnder interferometer (MZI). Unlike the particle nature-based quantum correlation in conventional quantum mechanics, the wave nature of photons is applied for collective phase control of coherent fields, resulting in a deterministically controllable nonclassical phenomenon. For the proof of principle, the entanglement between output light fields from a coupled MZI is examined using the Hong-Ou-Mandel-type anticorrelation technique, where the anticorrelation is a direct evidence of the nonclassical features in an interferometric scheme. For the generation of random phase bases between two bipartite input coherent fields, a deterministic control of opposite frequency shifts results in phase sensitive anticorrelation, which is a macroscopic quantum feature.

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