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Geometry and quantum brachistochrone analysis of multiple entangled spin-1/2 particles under all-range Ising interaction [PDF]
Scientific ReportsWe present a unified geometric and dynamical framework for a physical system consisting of n spin-1/2 particles with all-range Ising interaction. Using the Fubini-Study formalism, we derive the metric tensor of the associated quantum state manifold and ...
B. Amghar +5 more
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Joint Shaping of Geometry and Probability based on Mutual Information Neural Estimation
Guangtongxin yanjiu, 2022 In view of the problem that quadrature amplitude modulation has 1.53 dB capacity gap at the Shannon limit in high signal noise ratio, the paper proposes a joint shaping method of geometry and probability based on mutual information neural estimation ...
Jia-xi LIANG +3 more
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Photonics, 2023 Since visible-light communication (VLC) has become an increasingly promising candidate for 6G, the field of underwater visible-light communication (UVLC) has also garnered significant attention.
Yuan Wei +5 more
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Shape sensitive geometric monitoring [PDF]
Proceedings of the twenty-seventh ACM SIGMOD-SIGACT-SIGART symposium on Principles of database systems, 2008 A fundamental problem in distributed computation is the distributed evaluation of functions. The goal is to determine the value of a function over a set of distributed inputs, in a communication efficient manner. Specifically, we assume that each node holds a time varying input vector, and we are interested in determining, at any given time, whether ...
Izchak Sharfman +2 more
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Geometric Aspects of Shape Optimization
The Journal of Geometric Analysis, 2023 AbstractWe present a review of known results in shape optimization from the point of view of Geometric Analysis. This paper is devoted to the mathematical aspects of the shape optimization theory. We focus on the theory of gradient flows of objective functions and their regularizations.
Pavel I. Plotnikov, Jan Sokolowski
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Hard-Decision Coded Modulation for High-Throughput Short-Reach Optical Interconnect
Entropy, 2020 Coded modulation (CM), a combination of forward error correction (FEC) and high order modulation formats, has become a key part of modern optical communication systems.
Bin Chen +4 more
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Low-Complexity Geometric Shaping [PDF]
Journal of Lightwave Technology, 2021 Approaching Shannon's capacity via geometric shaping has usually been regarded as challenging due to modulation and demodulation complexity, requiring look-up tables to store the constellation points and constellation bit labeling. To overcome these challenges, in this paper, we study lattice-based geometrically shaped modulation formats in ...
Ali Mirani, Erik Agrell, Magnus Karlsson
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Lattice-based geometric shaping [PDF]
2020 European Conference on Optical Communications (ECOC), 2020 Geometrically shaped multidimensional constellations with more than 1028 points are simulated using fast and low-complexity algorithms without any look-up tables to store the constellation points. At the same symbol error rate, more than 78% and 114% reach improvement are demonstrated compared with 4- and 16-QAM, respectively.
Ali Mirani, Erik Agrell, Magnus Karlsson
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Geometric Shaping for Distortion-Limited Intensity Modulation/Direct Detection Data Center Links
IEEE Photonics Journal, 2023 Intra-data center links are subject to transmission impairments that pose challenges for efficient scaling of per-wavelength data rates beyond 100 Gb/s.
Ethan M. Liang, Joseph M. Kahn
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Light shaping from a physical-optics point of view [PDF]
EPJ Web of Conferences, 2020 In the design of optical element for light shaping, a geometric-optics assumption is usually used, where the validity of the assumption is rarely discussed in literature.
Yang Liangxin +3 more
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