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Littérature scientifique sur le sujet « Entropic coherence »

Auteur : Grafiati

Publié le 7 juin 2025

Mis à jour le 2 août 2025

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Articles de revues sur le sujet "Entropic coherence"

Mohamed, Abdel-Baset A., Atta Ur Rahman, and Hichem Eleuch. "Measurement Uncertainty, Purity, and Entanglement Dynamics of Maximally Entangled Two Qubits Interacting Spatially with Isolated Cavities: Intrinsic Decoherence Effect." Entropy 24, no. 4 (2022): 545. http://dx.doi.org/10.3390/e24040545.

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In a system of two charge-qubits that are initially prepared in a maximally entangled Bell’s state, the dynamics of quantum memory-assisted entropic uncertainty, purity, and negative entanglement are investigated. Isolated external cavity fields are considered in two different configurations: coherent-even coherent and even coherent cavity fields. For different initial cavity configurations, the temporal evolution of the final state of qubits and cavities is solved analytically. The effects of intrinsic decoherence and detuning strength on the dynamics of bipartite entropic uncertainty, purity

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Hall, Michael J. W. "Better Heisenberg Limits, Coherence Bounds, and Energy-Time Tradeoffs via Quantum Rényi Information." Entropy 24, no. 11 (2022): 1679. http://dx.doi.org/10.3390/e24111679.

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An uncertainty relation for the Rényi entropies of conjugate quantum observables is used to obtain a strong Heisenberg limit of the form RMSE≥f(α)/(⟨N⟩+12), bounding the root mean square error of any estimate of a random optical phase shift in terms of average photon number, where f(α) is maximised for non-Shannon entropies. Related simple yet strong uncertainty relations linking phase uncertainty to the photon number distribution, such as ΔΦ≥maxnpn, are also obtained. These results are significantly strengthened via upper and lower bounds on the Rényi mutual information of quantum communicati

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Caligiuri, Luigi Maxmilian. "QED coherence in matter, syntropy and the coherent domains as storing “devices”." Journal of Physics: Conference Series 2197, no. 1 (2022): 012004. http://dx.doi.org/10.1088/1742-6596/2197/1/012004.

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Abstract Several macroscopic systems, like in particular living organisms, are characterized by stability and high level of order at mesoscopic / macroscopic scale. These peculiar features cannot be explained by considering just short-range interactions among their elementary constituents (atoms / molecules) and the entropic dynamics governing it. The theory of QED coherence predicts that in condensed matter, when suitable boundary conditions about temperature and density are satisfied (as generally happens in living systems), a quantum phase transition spontaneously occurs, driving the system

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Sohns, Moritz. "Minimal Entropy and Entropic Risk Measures: A Unified Framework via Relative Entropy." Risks 13, no. 4 (2025): 70. https://doi.org/10.3390/risks13040070.

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We introduce a new coherent risk measure, the minimal-entropy risk measure, which is built on the minimal-entropy σ-martingale measure—a concept inspired by the well-known minimal-entropy martingale measure used in option pricing. While the minimal-entropy martingale measure is commonly used for pricing and hedging, the minimal-entropy σ-martingale measure has not previously been studied, nor has it been analyzed as a traditional risk measure. We address this gap by clearly defining this new risk measure and examining its fundamental properties. In addition, we revisit the entropic risk measur

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Hashimoto, Kazunari, and Chikako Uchiyama. "Effect of Quantum Coherence on Landauer’s Principle." Entropy 24, no. 4 (2022): 548. http://dx.doi.org/10.3390/e24040548.

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Landauer’s principle provides a fundamental lower bound for energy dissipation occurring with information erasure in the quantum regime. While most studies have related the entropy reduction incorporated with the erasure to the lower bound (entropic bound), recent efforts have also provided another lower bound associated with the thermal fluctuation of the dissipated energy (thermodynamic bound). The coexistence of the two bounds has stimulated comparative studies of their properties; however, these studies were performed for systems where the time-evolution of diagonal (population) and off-di

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FÖLLMER, HANS, and THOMAS KNISPEL. "ENTROPIC RISK MEASURES: COHERENCE VS. CONVEXITY, MODEL AMBIGUITY AND ROBUST LARGE DEVIATIONS." Stochastics and Dynamics 11, no. 02n03 (2011): 333–51. http://dx.doi.org/10.1142/s0219493711003334.

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We study a coherent version of the entropic risk measure, both in the law-invariant case and in a situation of model ambiguity. In particular, we discuss its behavior under the pooling of independent risks and its connection with a classical and a robust large deviations bound.

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Silver, Frederick H., Nikita Kelkar, and Tanmay Deshmukh. "Use of Vibrational Optical Coherence Tomography to Analyze the Mechanical Properties of Composite Materials." Sensors 21, no. 6 (2021): 2001. http://dx.doi.org/10.3390/s21062001.

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Energy storage and dissipation by composite materials are important design parameters for sensors and other devices. While polymeric materials can reversibly store energy by decreased chain randomness (entropic loss) they fail to be able to dissipate energy effectively and ultimately fail due to fatigue and molecular chain breakage. In contrast, composite tissues, such as muscle and tendon complexes, store and dissipate energy through entropic changes in collagen (energy storage) and viscous losses (energy dissipation) by muscle fibers or through fluid flow of the interfibrillar matrix. In thi

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Ye, Biao-Liang, Qi-Cheng Wu, Bao-Qing Guo, Jun-Long Zhao, Yu-Liang Fang, and Yan-Hui Zhou. "Steered quantum coherence and entropic uncertainty relation in the cluster Ising model." Journal of Statistical Mechanics: Theory and Experiment 2024, no. 9 (2024): 093102. http://dx.doi.org/10.1088/1742-5468/ad6df3.

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Abstract In this paper, we investigate the cluster Ising model (CIM) via steered quantum coherence (SQC) and entropic uncertainty relation (EUR). We present the behavior of SQC quantified by the L1 norm, relative entropy and quantum Jensen–Shannon divergence. We also demonstrate the properties of EUR in the CIM. In addition, we provide a comparative analysis of these measures and present detailed numerical results.

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Bhattacharyya, Arpan, Suddhasattwa Brahma, S. Shajidul Haque, Jacob S. Lund, and Arpon Paul. "Probing the self-coherence of primordial quantum fluctuations with complexity." Journal of Cosmology and Astroparticle Physics 2025, no. 07 (2025): 036. https://doi.org/10.1088/1475-7516/2025/07/036.

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Abstract A smoking gun for our current paradigm of the early universe would be direct evidence for the quantum mechanical origin of density perturbations which are conjectured to seed the large scale structure of our universe. A recently-proposed novel phenomenon is that of recoherence, wherein a specific interaction between the adiabatic and the entropic sector leads to the adiabatic mode retaining a coherent state after a transient increase in linear entropy. In this paper, we choose the Gaussian action allowing for both field-field and field-momentum coupling, and analyze the evolution of l

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Zhang, Zuo-Yuan, and Jin-Ming Liu. "Coherence and entropic uncertainty relation of dipole-coupled qubits under decoherence." Physica A: Statistical Mechanics and its Applications 589 (March 2022): 126639. http://dx.doi.org/10.1016/j.physa.2021.126639.

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Thèses sur le sujet "Entropic coherence"

Massaroppe, Lucas. "Caracterização da conectividade entre regiões cerebrais via entropia aproximada e causalidade de Granger." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/3/3142/tde-04112011-140951/.

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Essa dissertação apresenta o desenvolvimento métodos para caracterização da conectividade entre séries temporais neurofisiológicas. Utilizam-se metodologias provenientes da Teoria da Informação Entropias Aproximada e Amostral para representar a complexidade da série no tempo, o que permite inferir como sua variabilidade se transfere a outras sequências, através do uso da coerência parcial direcionada. Para cada sistema analisado: (1) Faz-se uma transformação em outro, relacionando-o às medidas de entropia, (2) Estima-se a conectividade pela coerência parcial direcionada e (3) Avalia-se a rob

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Bandyopadhyay, Jogia. "Optimal concentration for SU(1,1) coherent state transforms and an analogue of the Lieb-Wehrl conjecture for SU(1,1)." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/24801.

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Thesis (Ph.D.)--Physics, Georgia Institute of Technology, 2008.<br>Committee Chair: Eric A. Carlen; Committee Member: Jean Bellissard; Committee Member: Michael Loss; Committee Member: Predrag Cvitanovic.

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Locquet, Alexandre Daniel. "Chaotic optical communications using delayed feedback systems." Diss., Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/10431.

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Chaotic dynamics produced by optical delay systems have interesting applications in telecommunications. Optical chaos can be used to transmit secretly, in real-time, a message between an emitter and a receiver. The noise-like appearance of chaos is used to conceal the message, and the synchronization of the receiver with the chaotic emitter is used to decode the message. This work focuses on the study of two crucial topics in the field of chaotic optical communications. The first topic is the synchronization of chaotic external-cavity laser diodes, which are among the most promising chaotic

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Beny, Cedric. "Monte Carlo Study of the Magnetic Flux Lattice Fluctuations in High-T_c Superconductors." Thesis, University of Waterloo, 2005. http://hdl.handle.net/10012/1222.

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By allowing to measure the magnetic field distribution inside a material, muon spin rotation experiments have the potential to provide valuable information about microscopic properties of high-temperature superconductors. Nevertheless, information about the intrinsic superconducting properties of the material is masked by random thermal and static fluctuations of the magnetic field which penetrates the material in the form of vortices of quantized magnetic flux. A good understanding of the fluctuations of those vortices is needed for the correct determination of intrinsic properties, notab

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Fu, Ruijun. "Empirical RF Propagation Modeling of Human Body Motions for Activity Classification." Digital WPI, 2012. https://digitalcommons.wpi.edu/etd-theses/1130.

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"Many current and future medical devices are wearable, using the human body as a conduit for wireless communication, which implies that human body serves as a crucial part of the transmission medium in body area networks (BANs). Implantable medical devices such as Pacemaker and Cardiac Defibrillators are designed to provide patients with timely monitoring and treatment. Endoscopy capsules, pH Monitors and blood pressure sensors are used as clinical diagnostic tools to detect physiological abnormalities and replace traditional wired medical devices. Body-mounted sensors need to be investigated

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Sarabia, Francisco J. "Interfacial studies of Pt and Cu single-crystal electrodes modified by transition metal deposition." Doctoral thesis, Universidad de Alicante, 2021. http://hdl.handle.net/10045/118535.

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El conocimiento de las características interfaciales es de suma importancia para poder desarrollar materiales que sean capaces de dar lugar a reacciones electrocatalíticas eficientes. Por esta razón, en esta tesis se muestran diferentes estudios interfaciales sobre superficies monocristalinas de platino y cobre en diferentes electrolitos. Además se estudian las características de la interfase electrodoldisolución con superficies de platino modificadas con adátomos de hierro, cobalto y níquel. Para ello, se han empleado las técnicas de voltametría cíclica, espectroscopía infrarroja con transfor

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Calì, Camilla. "Past Lifetime and Inactivity Time: from Entropy to Coherent Systems." Tesi di dottorato, 2018. http://www.fedoa.unina.it/12609/1/Tesi_dottorato_Camilla_Cali.pdf.

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Information Theory was originally proposed by Claude Shannon in 1948 in the landmark paper entitled "A Mathematical Theory of Communication". In this paper the concept of entropy was adopted for the first time in a field other than thermodynamics and statistical mechanics. Since then, the interest in entropy has grown more and more and the current literature now focuses mainly on the analysis of residual lifetime. However, in recent years the interest has 'changed direction'. New notions of entropy have been introduced and are used to describe the past lifetime and the inactivity time of a giv

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Dorai, Arvind. "Automated Epileptic Seizure Onset Detection." Thesis, 2009. http://hdl.handle.net/10012/4342.

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Epilepsy is a serious neurological disorder characterized by recurrent unprovoked seizures due to abnormal or excessive neuronal activity in the brain. An estimated 50 million people around the world suffer from this condition, and it is classified as the second most serious neurological disease known to humanity, after stroke. With early and accurate detection of seizures, doctors can gain valuable time to administer medications and other such anti-seizure countermeasures to help reduce the damaging effects of this crippling disorder. The time-varying dynamics and high inter-individual varia

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Giesbrecht, James E. "Aspects of HF communications: HF noise and signal features." 2008. http://hdl.handle.net/2440/49489.

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To many, high-frequency (HF) radio communications is obsolete in this age of long distance satellite communications and undersea optical fiber. Yet despite this, the HF band is used by defence agencies for backup communications and spectrum surveillance, and is monitored by spectrum management organizations to enforce licensing. Such activity usually requires systems capable of locating distant transmitters, separating valid signals from interference and noise, and recognizing signal modulation. Research presented here targets the latter issue. The ultimate aim is to develop robust algorithms

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Hertz, Anaelle. "États cohérents et comprimés du potentiel de Morse et intrication créée par un miroir semi-transparent." Thèse, 2013. http://hdl.handle.net/1866/10305.

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Pour décrire les vibrations à l'intérieur des molécules diatomiques, le potentiel de Morse est une meilleure approximation que le système de l'oscillateur harmonique. Ainsi, en se basant sur la définition des états cohérents et comprimés donnée dans le cadre du problème de l'oscillateur harmonique, la première partie de ce travail suggère une construction des états cohérents et comprimés pour le potentiel de Morse. Deux types d’états seront construits et leurs différentes propriétés seront étudiées en portant une attention particulière aux trajectoires et aux dispersions afin de confirmer la q

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Livres sur le sujet "Entropic coherence"

Singh, Hanumant. An entropic framework for AUV sensor modelling. Massachusetts Institute of Technology, Woods Hole Oceanographic Institution, Joint Program in Oceanography/Applied Ocean Science and Engineering], 1995.

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Elze, Hans-Thomas. Decoherence and Entropy in Complex Systems: Selected Lectures from DICE 2002. Springer Berlin / Heidelberg, 2010.

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Treitler, Leo. Speaking of the I-Word. Edited by Benjamin Piekut and George E. Lewis. Oxford University Press, 2014. http://dx.doi.org/10.1093/oxfordhb/9780199892921.013.19.

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The chapter focuses on modern uses of “improvisation,” its derivatives (I-words), and its constitution with “composition” of a duality of opposites that—like many dualities—works as a hierarchy, valuing reason over impulse, order over entropy, coherence over incoherence, integration over disarticulation, organic wholeness over disjunction. It evaluates the effect of such a conception in accounts of music-making in the Middle Ages and the eighteenth century. It compares those accounts with language left by writers of the periods in view, finding contrariety by commission in the first and omissi

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Vermurlen, Brad. Reformed Resurgence. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780190073510.001.0001.

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One of the biggest movements in American Christianity, especially among younger Evangelicals, is a groundswell of interest in the Reformed tradition. In Reformed Resurgence, Vermurlen provides a comprehensive sociological account of this New Calvinist phenomenon—and what it entails for the broader Evangelical landscape in the United States. Vermurlen’s explanation of the Reformed resurgence develops a new theory for understanding how conservative religion can be strong and thriving in the hypermodern Western world. It is a paradigm using and expanding on strategic action field theory, a recent

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Chapitres de livres sur le sujet "Entropic coherence"

Yu, Francis T. S. "Coherence Theory of Optics." In Entropy and Information Optics. CRC Press, 2017. http://dx.doi.org/10.1201/b22443-9.

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Gamo, Hideya. "The Radiation Entropy in Laser Cooling Process." In Coherence and Quantum Optics VII. Springer US, 1996. http://dx.doi.org/10.1007/978-1-4757-9742-8_66.

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Barron, Tatyana, and Alexander Kazachek. "Coherent States and Entropy." In Lecture Notes in Computer Science. Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-38271-0_51.

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Tian, Fuyang, Yang Wang, Douglas L. Irving, and Levente Vitos. "Applications of Coherent Potential Approximation to HEAs." In High-Entropy Alloys. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-27013-5_9.

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He, Buwei, Yuhang Gao, and Yi Sun. "Colour Coherence Entropy for Ceramic Fragment Analysis." In Communications in Computer and Information Science. Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-1354-1_21.

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Perelomov, Askold. "Classical and Quantal Entropy." In Generalized Coherent States and Their Applications. Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-642-61629-7_28.

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Lin, Rui, Muyun Yang, Shujie Liu, Sheng Li, and Tiejun Zhao. "A Maximum Entropy Approach to Discourse Coherence Modeling." In Natural Language Processing and Chinese Computing. Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-25207-0_1.

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Styerwalt, D., and G. Heidbreder. "On a Bayesian Approach to Coherent Radar Imaging." In Maximum Entropy and Bayesian Methods. Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-017-2219-3_28.

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Jordan, Richard, and Bruce Turkington. "Maximum Entropy States and Coherent Structures in Magnetohydrodynamics." In Maximum Entropy and Bayesian Methods. Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-011-5430-7_43.

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Rajhans, Juhi, and A. N. Sekar Iyengar. "Differential Entropy Dynamics: A Possible Cause of Coherence Resonance." In Chaos, Complexity and Leadership 2013. Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-09710-7_9.

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Actes de conférences sur le sujet "Entropic coherence"

Rai, Jagdish, and Suranjana Rai. "Entropy content of squeezed states." In OSA Annual Meeting. Optica Publishing Group, 1987. http://dx.doi.org/10.1364/oam.1987.mq12.

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The entropy of an ensemble of systems is defined in classical statistical mechanics by the relation where k is the Boltzmann constant and p n is the probability of finding the system in state n. It is possible to generalize this definition of entropy to a quantum state ψ(x) with Fourier transform ϕ(p) by defining p n as1 The corresponding entropies for the two quadratures x ^ and p ^ are defined as For the coherent state S ( x ) = S ( p ) and has the minimum value. For the x quadrature squeezed state, S ( x ) decreases at the expense of S ( p ) and vice versa. This definition of entropy has ap

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Inguva, Ramarao, Steve Johnson, Bill Jones, and James Bilbro. "Maximum Entropy and Bayesian Methods for Processing of LAWS Data." In Coherent Laser Radar. Optica Publishing Group, 1991. http://dx.doi.org/10.1364/clr.1991.thd2.

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Harling, Mitchell, Varun Kelkar, Chukwuemeka Okoro, Mbaye Diouf, Ayman F. Abouraddy, and Kimani C. Toussaint. "A Reversible Optical-coherence Converter." In Frontiers in Optics. Optica Publishing Group, 2022. http://dx.doi.org/10.1364/fio.2022.jw4a.7.

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We demonstrate here that entropy, or random fluctuations, in an optical degree of freedom (DoF) can be reversibly swapped between different DoFs, such that coherence is converted back and forth between them without loss of energy.

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Kalashnikov, Vladimir L., Alexander Rudenkov, Evgeni Sorokin, and Irina T. Sorokina. "Energy Scalability Limits of mid-IR Femtosecond Pulse Oscillators." In Mid-Infrared Coherent Sources. Optica Publishing Group, 2024. http://dx.doi.org/10.1364/mics.2024.mth4c.1.

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Using statistical mechanics analysis we establish the two main limiting factors to the energy scaling of femtosecond pulses in a mid-IR chirped-pulsed-oscillator: system entropy increase with energy causing multiple pulsing, and a pulse phase homogeneity.

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Harling, Mitchell, Varun Kelkar, Kimani C. Toussaint, and Ayman F. Abouraddy. "Entropy Concentration in Partially Coherent Fields." In Frontiers in Optics. Optica Publishing Group, 2023. http://dx.doi.org/10.1364/fio.2023.jm4a.42.

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An optical field’s properties depend on the rank of its coherence matrix. The entropy of a rank-2 field can be concentrated into one degree-of-freedom. The entropy of a rank-3 field can never be concentrated.

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Cano-Andrade, Sergio, Michael R. von Spakovsky, and Gian Paolo Beretta. "Steepest-Entropy-Ascent Quantum Thermodynamic Non-Equilibrium Modeling of Decoherence of a Composite System of Two Interacting Spin-½ Systems." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-63596.

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The equation of motion of steepest-entropy-ascent quantum thermodynamics (SEA-QT) was first postulated in the early 1980s with the intent of modeling the non-linear dynamic behavior encountered in nature, which the unitary (linear) dynamics of the Schrödinger-von Neumann equation cannot. The SEA-QT equation is used here to model the decoherence phenomenon between two distinguishable and indivisible elementary constituents of type spin–½ (e.g., quantum bits or qubits). The resulting set of non-linear, first-order differential equations is solved with a fourth-order-Runge-Kutta routine provided

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Geaga, Jorge V. "Method for determining low entropy POLSAR coherence matrices." In Radar Sensor Technology XXIV, edited by Ann M. Raynal and Kenneth I. Ranney. SPIE, 2020. http://dx.doi.org/10.1117/12.2552211.

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Castricato, Louis, Spencer Frazier, Jonathan Balloch, and Mark Riedl. "Fabula Entropy Indexing: Objective Measures of Story Coherence." In Proceedings of the Third Workshop on Narrative Understanding. Association for Computational Linguistics, 2021. http://dx.doi.org/10.18653/v1/2021.nuse-1.9.

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Lee, J., D. McManus, and K. Chon. "Atrial Fibrillation detection using time-varying coherence function and Shannon Entropy." In 2011 33rd Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE, 2011. http://dx.doi.org/10.1109/iembs.2011.6091160.

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Petersen, Casper, Christina Lioma, Jakob Grue Simonsen, and Birger Larsen. "Entropy and Graph Based Modelling of Document Coherence using Discourse Entities." In ICTIR '15: ACM SIGIR International Conference on the Theory of Information Retrieval. ACM, 2015. http://dx.doi.org/10.1145/2808194.2809458.

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Rapports d'organisations sur le sujet "Entropic coherence"

Alwan, Iktimal, Dennis D. Spencer, and Rafeed Alkawadri. Comparison of Machine Learning Algorithms in Sensorimotor Functional Mapping. Progress in Neurobiology, 2023. http://dx.doi.org/10.60124/j.pneuro.2023.30.03.

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Objective: To compare the performance of popular machine learning algorithms (ML) in mapping the sensorimotor cortex (SM) and identifying the anterior lip of the central sulcus (CS). Methods: We evaluated support vector machines (SVMs), random forest (RF), decision trees (DT), single layer perceptron (SLP), and multilayer perceptron (MLP) against standard logistic regression (LR) to identify the SM cortex employing validated features from six-minute of NREM sleep icEEG data and applying standard common hyperparameters and 10-fold cross-validation. Each algorithm was tested using vetted feature

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