scholarly journals Entropy Growth and Formation of Stationary Entanglement due to Intrinsic Noise in the Two-Mode JC Model

2013 ◽  
Vol 2 (1) ◽  
pp. 1-9 ◽  
Author(s):  
H. A Hessian
Keyword(s):  
Intrinsic Noise ◽  
Jc Model ◽  
Entropy Growth ◽  
Stationary Entanglement

ENTROPY GROWTH AND DEGRADATION OF ENTANGLEMENT DUE TO DAMPING OF THE ATOMIC DECAY IN THE JC MODEL

2008 ◽  
Vol 22 (23) ◽  
pp. 4017-4025 ◽  
Author(s):  
H. A. HESSIAN
Keyword(s):  
Exact Solution ◽  
Temporal Evolution ◽  
Single Mode ◽  
Total Entropy ◽  
High Q ◽  
Negative Eigenvalues ◽  
Level Atom ◽  
Jc Model ◽  
Entropy Growth ◽  
Degree Of Entanglement

In this presentation, we considered the atomic decay (but not for the cavity) for a two-level atom interacting with a single mode of electromagnetic field. The exact solution of the master equation in the case of a high-Q cavity with atomic decay is found. The effects of the atomic damping for a thermal reservoir on the temporal evolution of partial entropies of the atom or the field, and the total entropy as a quantitative entanglement, was measured. The degree of entanglement, through the sum of the negative eigenvalues of the partially transposed density matrix and the negative mutual information, has been studied and compared with other measures.

scholarly journals Postquench entropy growth in a chiral clock model

2021 ◽  
Vol 103 (19) ◽  
Author(s):  
Naveen Nishad ◽  
M. Santhosh ◽  
G. J. Sreejith
Keyword(s):  
Clock Model ◽  
Entropy Growth

scholarly journals Chaotic Time-Delay Signature Suppression and Entropy Growth Enhancement Using Frequency-Band Extractor

Entropy ◽  
2021 ◽  
Vol 23 (5) ◽  
pp. 516
Author(s):  
Yanqiang Guo ◽  
Tong Liu ◽  
Tong Zhao ◽  
Haojie Zhang ◽  
Xiaomin Guo
Keyword(s):  
Time Delay ◽  
Frequency Band ◽  
Secure Communication ◽  
Optical Feedback ◽  
Random Number Generation ◽  
Permutation Entropy ◽  
Growth Enhancement ◽  
Dynamical Process ◽  
Promising Tool ◽  
Entropy Growth

By frequency-band extracting, we experimentally and theoretically investigate time-delay signature (TDS) suppression and entropy growth enhancement of a chaotic optical-feedback semiconductor laser under different injection currents and feedback strengths. The TDS and entropy growth are quantified by the peak value of autocorrelation function and the difference of permutation entropy at the feedback delay time. At the optimal extracting bandwidth, the measured TDS is suppressed up to 96% compared to the original chaos, and the entropy growth is higher than the noise-dominated threshold, indicating that the dynamical process is noisy. The effects of extracting bandwidth and radio frequencies on the TDS and entropy growth are also clarified experimentally and theoretically. The experimental results are in good agreements with the theoretical results. The skewness of the laser intensity distribution is effectively improved to 0.001 with the optimal extracting bandwidth. This technique provides a promising tool to extract randomness and prepare desired entropy sources for chaotic secure communication and random number generation.

Numerical Modeling of Tube Hydropiercing Using Phenomenological and Micro-Mechanical Damage Criteria

2013 ◽  
Vol 549 ◽  
pp. 172-179 ◽  
Author(s):  
Amir Hassannejadasl ◽  
Daniel E. Green
Keyword(s):  
Experimental Studies ◽  
Three Dimensional ◽  
Equivalent Plastic Strain ◽  
Mechanical Damage ◽  
High Strength ◽  
Dimensional Finite Element ◽  
Steel Dp600 ◽  
Three Dimensional Finite Element ◽  
Jc Model ◽  
Damage Criteria

Hydropiercing is an efficient way of piercing holes in mass produced hydroformed parts with complex geometries. By driving piercing punches radially into a hydroformed and fully pressurized tube, holes will be pierced and extruded into the tube-wall. Recent experimental studies have shown that the formability of advanced high strength steel (AHSS) tubes can be increased with the application of internal pressure. In this study, three-dimensional finite element simulations of a tube hydropiercing process of a dual phase steel (DP600) were performed in LS-DYNA, using phenomenological, micromechanical and combined damage criteria. Damage was included in the numerical analysis by applying constant equivalent plastic strain (CEPS), the Gurson-Tvergaard-Needleman (GTN), and the Extended GTN (GTN+JC) model. In order to calibrate the parameters in each model, a specialized hole-piercing fixture was designed and piercing tests were carried out on non-pressurized tube specimens. Of the various ductile fracture criteria, the results predicted with the GTN+JC model, such as the punch load-displacement, the roll-over depth, and the quality of the clearance zone correlated the best with the experimental data.

scholarly journals Entropy growth in emotional online dialogues

2013 ◽  
Vol 410 ◽  
pp. 012096 ◽  
Author(s):  
J Sienkiewicz ◽  
M Skowron ◽  
G Paltoglou ◽  
Janusz A Hołyst
Keyword(s):  
Entropy Growth

scholarly journals End-to-End Image Simulator for Optical Imaging Systems: Equations and Simulation Examples

2013 ◽  
Vol 2013 ◽  
pp. 1-23 ◽  
Author(s):  
Peter Coppo ◽  
Leandro Chiarantini ◽  
Luciano Alparone
Keyword(s):  
Optical Design ◽  
Software Tool ◽  
Intrinsic Noise ◽  
Classification Performance ◽  
Theoretical Description ◽  
Hyperspectral Data ◽  
Software Environment ◽  
Future Design ◽  
Optical Instruments ◽  
End To End

The theoretical description of a simplified end-to-end software tool for simulation of data produced by optical instruments, starting from either synthetic or airborne hyperspectral data, is described and some simulation examples of hyperspectral and panchromatic images for existing and future design instruments are also reported. High spatial/spectral resolution images with low intrinsic noise and the sensor/mission specifications are used as inputs for the simulations. The examples reported in this paper show the capabilities of the tool for simulating target detection scenarios, data quality assessment with respect to classification performance and class discrimination, impact of optical design on image quality, and 3D modelling of optical performances. The simulator is conceived as a tool (during phase 0/A) for the specification and early development of new Earth observation optical instruments, whose compliance to user’s requirements is achieved through a process of cost/performance trade-off. The Selex Galileo simulator, as compared with other existing image simulators for phase C/D projects of space-borne instruments, implements all modules necessary for a complete panchromatic and hyper spectral image simulation, and it allows excellent flexibility and expandability for new integrated functions because of the adopted IDL-ENVI software environment.

Influence of intrinsic noise generated by a thermotesting device on thermal sensory detection and thermal pain detection thresholds

2009 ◽  
Vol 40 (2) ◽  
pp. 257-263 ◽  
Author(s):  
G. Pavlaković ◽  
K. Züchner ◽  
A. Zapf ◽  
C.G. Bachmann ◽  
B.M. Graf ◽  
...  
Keyword(s):  
Intrinsic Noise ◽  
Detection Thresholds ◽  
Thermal Pain ◽  
Pain Detection
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