**Commenced**in January 2007

**Frequency:**Monthly

**Edition:**International

**Paper Count:**210

# Search results for: Quantum Plasma

##### 210 Instability of Electron Plasma Waves in an Electron-Hole Bounded Quantum Dusty Plasma

**Authors:**
Basudev Ghosh,
Sailendranath Paul,
Sreyasi Banerjee

**Abstract:**

Using quantum hydrodynamical (QHD) model the linear dispersion relation for the electron plasma waves propagating in a cylindrical waveguide filled with a dense plasma containing streaming electron, hole and stationary charged dust particles has been derived. It is shown that the effect of finite boundary and stream velocity of electrons and holes make some of the possible modes of propagation linearly unstable. The growth rate of this instability is shown to depend significantly on different plasma parameters.

**Keywords:**
Electron Plasma wave,
Quantum plasma,
Quantum Hydrodynamical model.

##### 209 Propagation of Nonlinear Surface Waves in Relativistically Degenerate Quantum Plasma Half-Space

**Authors:**
Swarniv Chandra,
Parthasona Maji,
Basudev Ghosh

**Abstract:**

The nonlinear self-interaction of an electrostatic surface wave on a semibounded quantum plasma with relativistic degeneracy is investigated by using quantum hydrodynamic (QHD) model and the Poisson’s equation with appropriate boundary conditions. It is shown that a part of the second harmonic generated through self-interaction does not have a true surface wave character but propagates obliquely away from the plasma-vacuum interface into the bulk of plasma.

**Keywords:**
Harmonic Generation,
Quantum Plasma,
Quantum Hydrodynamic Model,
Relativistic Degeneracy,
Surface waves.

##### 208 Nonlinear Solitary Structures of Electron Plasma Waves in a Finite Temperature Quantum Plasma

**Authors:**
Swarniv Chandra,
Basudev Ghosh

**Abstract:**

**Keywords:**
Electron Plasma Waves,
Finite Temperature Model,
Modulational Instability,
Quantum Plasma,
Solitary structure

##### 207 Nonplanar Ion-acoustic Waves in a Relativistically Degenerate Quantum Plasma

**Authors:**
Swarniv Chandra,
Sibarjun Das,
Agniv Chandra,
Basudev Ghosh,
Apratim Jash

**Abstract:**

**Keywords:**
Kadomtsev-Petviashvili equation,
Ion-acoustic
Waves,
Relativistic Degeneracy,
Quantum Plasma,
Quantum
Hydrodynamic Model.

##### 206 Modulational Instability of Electron Plasma Waves in Finite Temperature Quantum Plasma

**Authors:**
Swarniv Chandra,
Basudev Ghosh

**Abstract:**

Using the quantum hydrodynamic (QHD) model for quantum plasma at finite temperature the modulational instability of electron plasma waves is investigated by deriving a nonlinear Schrodinger equation. It was found that the electron degeneracy parameter significantly affects the linear and nonlinear properties of electron plasma waves in quantum plasma.

**Keywords:**
Amplitude Modulation,
Electron Plasma Waves,
Finite Temperature Model,
Modulational Instability,
Quantum
Plasma.

##### 205 The Magnetized Quantum Breathing in Cylindrical Dusty Plasma

**Authors:**
A. Abdikian

**Abstract:**

**Keywords:**
The linear quantum hydrodynamic model,
the magnetized quantum breathing mode,
the quantum dispersion relation of rotation mode,
void structure.

##### 204 Quantum Ion Acoustic Solitary and Shock Waves in Dissipative Warm Plasma with Fermi Electron and Positron

**Authors:**
Hamid Reza Pakzad

**Abstract:**

**Keywords:**
Ion acoustic shock waves; Quantum plasmas

##### 203 Propagation of Electron-Acoustic Solitary Waves in Weakly Relativistically Degenerate Fermi Plasma

**Authors:**
Swarniv Chandra,
Basudev Ghosh,
S. N. Paul

**Abstract:**

**Keywords:**
Relativistic Degeneracy,
Electron-Acoustic Waves,
Quantum Plasma,
KdV Equation.

##### 202 A Programmer’s Survey of the Quantum Computing Paradigm

**Authors:**
Philippe Jorrand

**Abstract:**

Research in quantum computation is looking for the consequences of having information encoding, processing and communication exploit the laws of quantum physics, i.e. the laws which govern the ultimate knowledge that we have, today, of the foreign world of elementary particles, as described by quantum mechanics. This paper starts with a short survey of the principles which underlie quantum computing, and of some of the major breakthroughs brought by the first ten to fifteen years of research in this domain; quantum algorithms and quantum teleportation are very biefly presented. The next sections are devoted to one among the many directions of current research in the quantum computation paradigm, namely quantum programming languages and their semantics. A few other hot topics and open problems in quantum information processing and communication are mentionned in few words in the concluding remarks, the most difficult of them being the physical implementation of a quantum computer. The interested reader will find a list of useful references at the end of the paper.

**Keywords:**
Quantum information processing,
quantum algorithms,
quantum programming languages.

##### 201 Numerical Calculation of the Ionization Energy of Donors in a Cubic Quantum well and Wire

**Authors:**
Sara Sedaghat,
Mahmood Barati,
Iraj Kazeminezhad

**Abstract:**

**Keywords:**
quantum well,
quantum wire,
quantum dot,
impuritystate

##### 200 An Authentication Protocol for Quantum Enabled Mobile Devices

**Authors:**
Natarajan Venkatachalam,
Subrahmanya V. R. K. Rao,
Vijay Karthikeyan Dhandapani,
Swaminathan Saravanavel

**Abstract:**

**Keywords:**
Quantum cryptography,
quantum key distribution,
wireless quantum communication,
authentication protocol,
quantum
enabled device,
trusted third party.

##### 199 A Post Processing Method for Quantum Prime Factorization Algorithm based on Randomized Approach

**Authors:**
Mir Shahriar Emami,
Mohammad Reza Meybodi

**Abstract:**

**Keywords:**
Quantum Prime Factorization,
RandomizedAlgorithms,
Quantum Computer Simulation,
Quantum Computation.

##### 198 Plasma Properties Effect on Fluorescent Tube Plasma Antenna Performance

**Authors:**
A. N. Dagang,
E. I. Ismail,
Z. Zakaria

**Abstract:**

This paper presents the analysis on the performance of monopole antenna with fluorescent tubes. In this research, the simulation and experimental approach is conducted. The fluorescent tube with different length and size is designed using Computer Simulation Technology (CST) software and the characteristics of antenna parameter are simulated throughout the software. CST was used to simulate antenna parameters such as return loss, resonant frequency, gain and directivity. Vector Network Analyzer (VNA) was used to measure the return loss of plasma antenna in order to validate the simulation results. In the simulation and experiment, the supply frequency is set starting from 1 GHz to 10 GHz. The results show that the return loss of plasma antenna changes when size of fluorescent tubes is varied, correspond to the different plasma properties. It shows that different values of plasma properties such as plasma frequency and collision frequency gives difference result of return loss, gain and directivity. For the gain, the values range from 2.14 dB to 2.36 dB. The return loss of plasma antenna offers higher value range from -22.187 dB to -32.903 dB. The higher the values of plasma frequency and collision frequency, the higher return loss can be obtained. The values obtained are comparative to the conventional type of metal antenna.

**Keywords:**
Plasma antenna,
fluorescent tube,
computer simulation technology,
plasma parameters.

##### 197 A Computer Model of Quantum Field Theory

**Authors:**
Hans H. Diel

**Abstract:**

This paper describes a computer model of Quantum Field Theory (QFT), referred to in this paper as QTModel. After specifying the initial configuration for a QFT process (e.g. scattering) the model generates the possible applicable processes in terms of Feynman diagrams, the equations for the scattering matrix, and evaluates probability amplitudes for the scattering matrix and cross sections. The computations of probability amplitudes are performed numerically. The equations generated by QTModel are provided for demonstration purposes only. They are not directly used as the base for the computations of probability amplitudes. The computer model supports two modes for the computation of the probability amplitudes: (1) computation according to standard QFT, and (2) computation according to a proposed functional interpretation of quantum theory.

**Keywords:**
Computational Modeling,
Simulation of Quantum Theory,
Quantum Field Theory,
Quantum Electrodynamics

##### 196 Proposal of Optimality Evaluation for Quantum Secure Communication Protocols by Taking the Average of the Main Protocol Parameters: Efficiency, Security and Practicality

**Authors:**
Georgi Bebrov,
Rozalina Dimova

**Abstract:**

**Keywords:**
Quantum cryptography,
quantum secure
communcation,
quantum secure direct communcation security,
quantum secure direct communcation efficiency,
quantum secure
direct communcation practicality.

##### 195 Effect of Pre-Plasma Potential on Laser Ion Acceleration

**Authors:**
Djemai Bara,
Mohamed Faouzi Mahboub,
Djamila Bennaceur-Doumaz

**Abstract:**

**Keywords:**
Cairns-Gurevich Equation,
ion acceleration,
plasma expansion,
pre-plasma.

##### 194 Behavior of Current in a Semiconductor Nanostructure under Influence of Embedded Quantum Dots

**Authors:**
H. Paredes Gutiérrez,
S. T. Pérez-Merchancano

**Abstract:**

Motivated by recent experimental and theoretical developments, we investigate the influence of embedded quantum dot (EQD) of different geometries (lens, ring and pyramidal) in a double barrier heterostructure (DBH). We work with a general theory of quantum transport that accounts the tight-binding model for the spin dependent resonant tunneling in a semiconductor nanostructure, and Rashba spin orbital to study the spin orbit coupling. In this context, we use the second quantization theory for Rashba effect and the standard Green functions method. We calculate the current density as a function of the voltage without and in the presence of quantum dots. In the second case, we considered the size and shape of the quantum dot, and in the two cases, we worked considering the spin polarization affected by external electric fields. We found that the EQD generates significant changes in current when we consider different morphologies of EQD, as those described above. The first thing shown is that the current decreases significantly, such as the geometry of EQD is changed, prevailing the geometrical confinement. Likewise, we see that the current density decreases when the voltage is increased, showing that the quantum system studied here is more efficient when the morphology of the quantum dot changes.

**Keywords:**
Quantum semiconductors,
nanostructures,
quantum dots,
spin polarization.

##### 193 1/f Noise in Quantum-Size Heteronanostructures Based On GaAs and Alloys

**Authors:**
Alexey V. Klyuev,
Arkady. V. Yakimov

**Abstract:**

The 1/f noise investigation in nanoscale light-emitting diodes and lasers, based on GaAs and alloys, is presented here. Leakage and additional (to recombination through quantum wells and/or dots) nonlinear currents were detected and it was shown that these currents are the main source of the 1/f noise in devices studied.

**Keywords:**
Lasers,
light-emitting diodes,
quantum dots,
quantum wells,
1/f noise.

##### 192 A method of Authentication for Quantum Networks

**Authors:**
Stefan Rass

**Abstract:**

**Keywords:**
Meet-in-the-middle attack,
quantum key distribution,
quantum networks,
unconditionally secure authentication.

##### 191 Nonlinear Propagation of Acoustic Soliton Waves in Dense Quantum Electron-Positron Magnetoplasma

**Authors:**
A. Abdikian

**Abstract:**

**Keywords:**
Bifurcation theory,
magnetized electron-positron plasma,
phase portrait,
the Zakharov-Kuznetsov equation.

##### 190 Water Vapor Plasma Torch: Design, Characteristics and Applications

**Authors:**
A. Tamošiūnas,
P. Valatkevičius,
V. Grigaitiene,
V. Valinčius

**Abstract:**

**Keywords:**
Arc discharge,
atmospheric pressure thermal plasma,
plasma torch,
water vapor.

##### 189 Entanglement-based Quantum Computing by Diagrams of States

**Authors:**
Sara Felloni,
Giuliano Strini

**Abstract:**

**Keywords:**
Diagrams of states,
entanglement,
quantum circuits,
quantum information.

##### 188 Unconditionally Secure Quantum Payment System

**Authors:**
Essam Al-Daoud

**Abstract:**

A potentially serious problem with current payment systems is that their underlying hard problems from number theory may be solved by either a quantum computer or unanticipated future advances in algorithms and hardware. A new quantum payment system is proposed in this paper. The suggested system makes use of fundamental principles of quantum mechanics to ensure the unconditional security without prior arrangements between customers and vendors. More specifically, the new system uses Greenberger-Home-Zeilinger (GHZ) states and Quantum Key Distribution to authenticate the vendors and guarantee the transaction integrity.

**Keywords:**
Bell state,
GHZ state,
Quantum key distribution,
Quantum payment system.

##### 187 Plasma Arc Burner for Pulverized Coal Combustion

**Authors:**
Gela Gelashvili,
David Gelenidze,
Sulkhan Nanobashvili,
Irakli Nanobashvili,
George Tavkhelidze,
Tsiuri Sitchinava

**Abstract:**

**Keywords:**
Coal combustion,
plasma arc,
plasma torches,
pulverized coal.

##### 186 Feasibility of Leukemia Cancer Treatment (K562) by Atmospheric Pressure Plasma Jet

**Authors:**
Mashayekh Amir Shahriar,
Akhlaghi Morteza,
Rajaee Hajar,
Khani Mohammad Reza,
Shokri Babak

**Abstract:**

A new and novel approach in medicine is the use of cold plasma for various applications such as sterilization blood coagulation and cancer cell treatment. In this paper a pin-to-hole plasma jet suitable for biological applications is investigated and characterized and the possibility and feasibility of cancer cell treatment is evaluated. The characterization includes power consumption via Lissajous method, thermal behavior of plasma using Infra-red camera as a novel method, Optical Emission Spectroscopy (OES) to determine the species that are generated. Treatment of leukemia cancer cells is also implemented and MTT assay is used to evaluate viability.

**Keywords:**
Atmospheric Pressure Plasma Jet (APPJ),
Plasma
Medicine,
Cancer cell treatment,
leukemia.

##### 185 Quantum Computing: A New Era of Computing

**Authors:**
Jyoti Chaturvedi Gursaran

**Abstract:**

Nature conducts its action in a very private manner. To reveal these actions classical science has done a great effort. But classical science can experiment only with the things that can be seen with eyes. Beyond the scope of classical science quantum science works very well. It is based on some postulates like qubit, superposition of two states, entanglement, measurement and evolution of states that are briefly described in the present paper. One of the applications of quantum computing i.e. implementation of a novel quantum evolutionary algorithm(QEA) to automate the time tabling problem of Dayalbagh Educational Institute (Deemed University) is also presented in this paper. Making a good timetable is a scheduling problem. It is NP-hard, multi-constrained, complex and a combinatorial optimization problem. The solution of this problem cannot be obtained in polynomial time. The QEA uses genetic operators on the Q-bit as well as updating operator of quantum gate which is introduced as a variation operator to converge toward better solutions.

**Keywords:**
Quantum computing,
qubit,
superposition,
entanglement,
measurement of states,
evolution of states,
Scheduling
problem,
hard and soft constraints,
evolutionary algorithm,
quantum
evolutionary algorithm.

##### 184 Plasma Density Distribution in Asymmetric Geometry Capacitive Coupled Plasma Discharge System

**Authors:**
Yinchang Du,
Yangfang Li

**Abstract:**

**Keywords:**
Capacitive coupled discharge,
asymmetric discharge,
homogeneous plasma.

##### 183 Novel Design of Quantum Dot Arrays to Enhance Near-Fields Excitation Resonances

**Authors:**
N. H. Ismail,
A. A. A. Nassar,
K. H. Baz

**Abstract:**

Semiconductor crystals smaller than about 10 nm, known as quantum dots, have properties that differ from large samples, including a band gap that becomes larger for smaller particles. These properties create several applications for quantum dots. In this paper new shapes of quantum dot arrays are used to enhance the photo physical properties of gold nano-particles. This paper presents a study of the effect of nano-particles shape, array, and size on their absorption characteristics.

**Keywords:**
Quantum Dots,
Nano-Particles,
LSPR.

##### 182 A Functional Interpretation of Quantum Theory

**Authors:**
Hans H. Diel

**Abstract:**

**Keywords:**
Computability,
Foundation of Quantum Mechanics,
Measurement Problem,
Models of Physics.

##### 181 The Hall Coefficient and Magnetoresistance in Rectangular Quantum Wires with Infinitely High Potential under the Influence of a Laser Radiation

**Authors:**
Nguyen Thu Huong,
Nguyen Quang Bau

**Abstract:**

**Keywords:**
Hall coefficient,
rectangular quantum wires,
electron-optical phonon interaction,
quantum kinetic equation.