scholarly journals Quantum Quantifiers for an Atom System Interacting with a Quantum Field Based on Pseudoharmonic Oscillator States

Entropy ◽  
2018 ◽  
Vol 20 (8) ◽  
pp. 607 ◽  
Author(s):  
Bahaaudin Raffah ◽  
Kamal Berrada
Keyword(s):  
Coherent States ◽  
Temporal Evolution ◽  
Physical Parameters ◽  
Quantum Field ◽  
Field System ◽  
Level Atom ◽  
Coherent Field ◽  
The Relationship ◽  
Physical Quantities ◽  
Atom System

We develop a useful model considering an atom-field system interaction in the framework of pseudoharmonic oscillators. We examine qualitatively the different physical quantities for a two-level atom (TLA) system interacting with a quantized coherent field in the context of photon-added coherent states of pseudoharmonic oscillators. Using these coherent states, we solve the model that exhibits the interaction between the TLA and field associated with these kinds of potentials. We analyze the temporal evolution of the entanglement, statistical properties, geometric phase and squeezing entropies. Finally, we show the relationship between the physical quantities and their dynamics in terms of the physical parameters.

scholarly journals Einstein-Podolsky-Rosen Steering for Mixed Entangled Coherent States

Entropy ◽  
2021 ◽  
Vol 23 (11) ◽  
pp. 1442
Author(s):  
Sayed Abdel-Khalek ◽  
Kamal Berrada ◽  
Mariam Algarni ◽  
Hichem Eleuch
Keyword(s):  
Coherent States ◽  
Temporal Evolution ◽  
Bell Inequality ◽  
Dynamical Behavior ◽  
Photon Number ◽  
Einstein Podolsky Rosen ◽  
Quantum Steering ◽  
Bell Nonlocality ◽  
The Relationship ◽  
Entangled Coherent States

By using the Born Markovian master equation, we study the relationship among the Einstein–Podolsky–Rosen (EPR) steering, Bell nonlocality, and quantum entanglement of entangled coherent states (ECSs) under decoherence. We illustrate the dynamical behavior of the three types of correlations for various optical field strength regimes. In general, we find that correlation measurements begin at their maximum and decline over time. We find that quantum steering and nonlocality behave similarly in terms of photon number during dynamics. Furthermore, we discover that ECSs with steerability can violate the Bell inequality, and that not every ECS with Bell nonlocality is steerable. In the current work, without the memory stored in the environment, some of the initial states with maximal values of quantum steering, Bell nonlocality, and entanglement can provide a delayed loss of that value during temporal evolution, which is of interest to the current study.

The relationship between physical parameters and wear of dental composites

Wear ◽  
2007 ◽  
Vol 263 (7-12) ◽  
pp. 1138-1146 ◽  
Author(s):  
S.D. Heintze ◽  
G. Zellweger ◽  
G. Zappini
Keyword(s):  
Dental Composites ◽  
Physical Parameters ◽  
The Relationship

INTERACTION OF MESOSCOPIC JOSEPHSON JUNCTION WITH A SUCCESSIVE SQUEEZED COHERENT FIELD

2000 ◽  
Vol 14 (16) ◽  
pp. 609-618
Author(s):  
V. A. POPESCU
Keyword(s):  
Coherent State ◽  
Josephson Junction ◽  
Coherent States ◽  
Quantum Noise ◽  
Shapiro Steps ◽  
Superconducting Ring ◽  
Coherent Field ◽  
Current Voltage ◽  
Quantum Current ◽  
The Difference

Signal-to-quantum noise ratio for quantum current in mesoscopic Josephson junction of a circular superconducting ring can be improved if the electromagnetic field is in a successive squeezed coherent state. The mesoscopic Josephson junctions can feel the difference between the successive squeezed coherent states and other types of squeezed coherent states because their current–voltage Shapiro steps are different. We compare our method with another procedure for superposition of two squeezed coherent states (a squeezed even coherent state) and consider the effect of different large inductances on the supercurrent.

scholarly journals Field Squeezing in a Quantum-Dot Molecule Jaynes-Cummings Model

2014 ◽  
Vol 2014 ◽  
pp. 1-7
Author(s):  
Xu Chu ◽  
Xiaodong Ma ◽  
Ying Wang ◽  
Qingchun Zhou ◽  
Yu Zhou
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Number Field ◽  
Electron Tunneling ◽  
Photon Number ◽  
Electron Interaction ◽  
Coherent Field ◽  
Physical Quantities

We investigate the field squeezing in a system composed of an initial coherent field interacting with two quantum dots coupled by electron tunneling. An approximate quantum-dot molecule Jaynes-Cummings model describing the system is given, and the effects of physical quantities, such as the temperature, phonon-electron interaction, mean photon number, field detuning, and tunneling-level detuning, are discussed in detail.

scholarly journals Infrared Spectroscopy of Jupiter and Saturn

2002 ◽  
Vol 12 ◽  
pp. 96-98
Author(s):  
Pierre Drossart
Keyword(s):  
Remote Sensing ◽  
Infrared Spectroscopy ◽  
Thermal Emission ◽  
Temporal Evolution ◽  
Imaging Spectroscopy ◽  
Giant Planets ◽  
Infrared Range ◽  
Physical Parameters ◽  
Temperature Structure ◽  
Reflected Light

AbstractThe spectroscopy of giant planets in the infrared range gives access to a remote sensing of many physical parameters. The composition, pressure/temperature structure, and the cloud structure all contribute to the spectrum, in solar reflected light below 3 micrometer as well as thermal emission above, from atmospheric levels ranging from the mesosphere down to the troposphere. Imaging spectroscopy revealing the variability of the atmosphere gives access to spatial and temporal evolution of these parameters, constraining the meteorological evolution of the planets.

scholarly journals The Relationship Between Cloud Cover and Outgoing Longwave Radiation in the Southern of Vietnam

2018 ◽  
Vol 34 (1S) ◽  
Author(s):  
Chu Thi Thu Huong ◽  
Bui Thi Hop ◽  
Tran Dinh Linh ◽  
Vu Thanh Hang
Keyword(s):  
Spatial Distribution ◽  
Rainy Season ◽  
Outgoing Longwave Radiation ◽  
Cloud Cover ◽  
Temporal Evolution ◽  
El Nino ◽  
Longwave Radiation ◽  
Downward Trend ◽  
La Nina ◽  
The Relationship

Abstract: Based on the data that has the resolution is 1,00×1,00of the Outgoing Longwave Radiation (OLR) and the cloud cover from NCEP/NCAR in the 1981 – 2012 period, the relationship between the cloud cover and the OLR in the Southern of Vietnam wasinvestigated when analyze and compare the spatial distribution, temporal evolution and their correlation. The results show that the characteristics of the spatial distribution and the year cycle of cloud cover and OLR are inversely correlated. The region or time that the cloud cover is great, the OLR is small and vice versa. In the Southern of Vietnam, the OLR value isgreatest(or smallest) in the dry (or rainy) season and in the El-Nino (La-Nina) years. In addition, during the 1981-2012period, the OLR in this region shows a downward trend about 3.6 W/m2/decade, while the cloud cover tends to increase by 0.2%/decade. Keywords: Cloud cover, Outgoing Longwave Radiation, the Southern of Vietnam.

scholarly journals The use of an adaptive mesh based on a quad tree for modeling the final state of a quantum field system under pulsed external action

2020 ◽  
Vol 11 (1) ◽  
pp. 79-92
Author(s):  
Анатолий Дмитриевич Панферов ◽  
Алексей Владимирович Маханьков ◽  
Александр Алексеевич Трунов
Keyword(s):  
Adaptive Mesh ◽  
External Action ◽  
Quantum Field ◽  
Final State ◽  
Field System ◽  
Quad Tree

Успешность использования математических моделей, определяющих поведение квантово-полевых систем в параметрических пространствах, критически зависит от уровня оптимизации процедуры получения решения. В работе рассматривается задача вычисления плотности носителей, возникающих в графене в результате действия импульсного электрического поля. Основой модели является система кинетических уравнений, обеспечивающих вычисление остаточной функции распределения. Её интегрирование по импульсному пространству даёт искомую плотность носителей. Проблема заключается в высокой вычислительной сложности покрытия импульсного пространства равномерной сеткой, обеспечивающей точное вычисление плотности для различных параметров импульса поля. При этом модель не содержит критериев определения удовлетворительных параметров сетки. В работе предложена и реализована процедура построения адаптивной сетки в форме квадродерева, имеющего переменный размер покрывающих квадратов. Построение реализовано в форме итерационной процедуры, совмещенной с процессом вычисления значений функции распределения.

Study on the Relationship between Canal System Conveyance Efficiency and Basic Physical Parameters of Gravity Irrigation Districts

2014 ◽  
Vol 955-959 ◽  
pp. 3422-3426
Author(s):  
Hong Wei Jia ◽  
Ke Ke Hu ◽  
Fei Su
Keyword(s):  
Physical Parameters ◽  
Irrigation Canal ◽  
Canal System ◽  
Positive Role ◽  
Engineering Construction ◽  
Irrigation Districts ◽  
Basic Parameters ◽  
Irrigation Engineering ◽  
Operation Status ◽  
The Relationship

Canal system conveyance efficiency (CSCE ) is a basic parameter of engineering construction and water management of the irrigation districts, either the response of operation status of an irrigation canal system. It plays great significance in searching quantity relationship between ICSCE and other basic parameters reflecting the condition of irrigation engineering. This paper, gravity irrigation districts in Zhejiang province as an example, sets up the relationship between basic parameters such as irrigation canal lining rate, canal flow and the CSCE, based on determining the CSCE in 61 typical gravity irrigation districts. And it also reflects the influence of basic parameters on CSCE, having a certain accuracy. This result plays a positive role on the further research and actual work on CSCE.

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