Information and communication theory, as a research area, investigates the fundamental limits and principles governing the representation, transmission, processing, and storage of information in communication systems. It encompasses topics such as source and channel coding, rate–distortion theory, channel capacity, error-correcting codes, network information theory, and multi-user communication. The field develops mathematical models and performance bounds for noisy and noiseless channels, explores trade-offs among reliability, efficiency, latency, and complexity, and informs the design of practical communication protocols and coding schemes in digital communications, data networks, and distributed information-processing systems.
Optical fiber, as a physical medium for information transmission, is the "highway" of modern economic and social development. However, with the continuous emergence of high-speed and high-capacity communication scenarios ...
Optics & Photonics
Aug 28, 2024
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Unlike classical encryption, which relies on mathematical algorithms, quantum encryption assures security based on physical principles. Detection of espionage or interference is guaranteed by unavoidable alteration of the ...
Optics & Photonics
Aug 12, 2024
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Structured light can significantly enhance information capacity, due to its coupling of spatial dimensions and multiple degrees of freedom. In recent years, the combination of structured light patterns with image processing ...
Optics & Photonics
Jul 23, 2024
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Waves pick up information from their environment through which they propagate. A theory of information carried by waves has now been developed at TU Wien—with astonishing results that can be utilized for technical applications.
Optics & Photonics
Jun 12, 2024
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The discovery of quantum mechanics opened the door to fundamentally new ways of communicating, processing, and protecting data. With a quantum revolution well underway, long unimaginable opportunities are coming within our ...
Quantum Physics
May 30, 2024
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The future of optical communications just got brighter. In a development reported in Advanced Photonics, researchers from Nanjing University have introduced iso-propagation vortices (IPVs), a novel concept that offers a solution ...
Optics & Photonics
May 20, 2024
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Research groups demonstrated for the first time that inequivalent mutually unbiased bases (MUBs) have different information extraction capabilities for quantum information processing. The research results were published in ...
Quantum Physics
May 15, 2024
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Advanced information processing technologies offer greener telecommunications and strong data security for millions, a study led by University of Maryland (UMD) researchers revealed.
Optics & Photonics
May 14, 2024
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Every computing system, biological or synthetic, from cells to brains to laptops, has a cost. This isn't the price, which is easy to discern, but an energy cost connected to the work required to run a program and the heat ...
General Physics
May 13, 2024
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244
In the 1880s Heinrich Hertz discovered that a spark jumping between two pieces of metal emits a flash of light—rapidly oscillating electromagnetic waves—which can be picked up by an antenna. To honor his groundbreaking ...
Optics & Photonics
May 8, 2024
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