Piri Keşif Aracı

Özet Ek Bilgiler

We present nonlocal integrable reductions of the Fordy–Kulish system of nonlinear Schrodinger equations and the Fordy system of derivative nonlinear Schrodinger equations on Hermitian symmetric spaces. Examples are given on the symmetric space SU(4)SU(2)×SU(2).

DOI : 10.1016/j.physleta.2017.03.051

Anahtar Kelimeler : Fordyu2013Kulish system, Nonlinear Schrodinger equations, Nonlocal integrable equations, Article

Cilt: 381
Sayı: 21
ISSN: 0375-9601
Sayfa: 1791-1794

Sınıflandırma :

Matematik %100

Topolojik Gruplar %100

2

Mesoscopic Fano effect in a spin splitter with a side-coupled quantum dot

Dergi Makalesi

Kaynak :

DSpace Makaleler

Dergi:

Physics Letters A

Yayıncı:

Elsevier B.V.

Yazar(lar) :

V. Moldoveanu , M. Tolea , Bilal Tanatar

Konu :

Fano effect, Mesoscopic rings, Rashba spin-orbit coupling

Yıl :

2012

Physics Letters A

Özet Ek Bilgiler

We investigate the interplay between the spin interference and the Fano effect in a three-lead mesoscopic ring with a side-coupled quantum dot (QD). A uniform Rashba spin-orbit coupling and a perpendicular magnetic field are tuned such that the ring operates as a spin splitter in the absence of the QD: one lead is used to inject unpolarized electrons and the remaining (output) leads collect almost polarized spin currents. By applying a gate potential to the quantum dot a pair of spin-split levels sweeps the bias window and leads to Fano interference. The steady-state spin and charge currents in the leads are calculated for a finite bias applied across the ring via the non-equilibrium Green's function formalism. When the QD levels participate to transport we find that the spin currents exhibit peaks and dips whereas the charge currents present Fano lineshapes. The location of the side-coupled quantum dot and the spin splitting of its levels also affect the interference and the output currents. The opposite response of output currents to the variation of the gate potential allows one to use this system as a single parameter current switch. We also analyze the dependence of the splitter efficiency on the spin splitting on the QD.

DOI : 10.1016/j.physleta.2012.02.017

Anahtar Kelimeler : Fano effect, Mesoscopic rings, Rashba spin-orbit coupling, Article

Cilt: 376
Sayı: 10-11
ISSN: 0375-9601
Sayfa: 1078-1083

Sınıflandırma :

Fizik %100

Kuantum Hesaplama %69

3

Hamiltonian structure of the Lotka-Volterra equations

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Kaynak :

DSpace Makaleler

Dergi:

Physics Letters A

Yayıncı:

Elsevier

Yazar(lar) :

Y. Nutku

Yıl :

1990

Physics Letters A

Özet Ek Bilgiler

The Lotka-Volterra equations governing predator-prey relations are shown to admit Hamiltonian structure with respect to a generalized Poisson bracket. These equations provide an example of a system for which the naive criterion for the existence of Hamiltonian structure fails. We show further that there is a three-component generalization of the Lotka-Volterra equations which is a bi-Hamiltonian system. © 1990.

DOI : 10.1016/0375-9601(90)90270-X

Anahtar Kelimeler : Article

Cilt: 145
Sayı: 1
ISSN: 0375-9601
Sayfa: 27-28

Sınıflandırma :

Matematik %100

Sıradan Diferansiyel Denklemler %25

4

EXACT PATH INTEGRAL SOLUTION OF A CLASS OF POTENTIALS RELATED TO THE RIGID ROTATOR

Dergi Makalesi

Kaynak :

DSpace Makaleler

Dergi:

PHYSICS LETTERS A

Yayıncı:

ELSEVIER SCIENCE BV

Yazar(lar) :

NK PAK , I SOKMEN

Yıl :

1984

PHYSICS LETTERS A

Piri Tam Metin Bulucu Ek Bilgiler

DOI : 10.1016/0375-9601(84)90463-8

Anahtar Kelimeler : article

ISSN: 0375-9601

Sınıflandırma :

Matematik %58

Fizik %32

Matematiksel ve Hesaplamalı Fizik %40

İstatistik Fizik ve Dinamik Sistemler %36

5

Generalization of the Kolmogorov-Sinai entropy: logistic-like and generalized cosine maps at the chaos threshold

Dergi Makalesi

Kaynak :

DSpace Makaleler

Dergi:

Physics Letters A

Yayıncı:

Elsevier Science Bv

Yazar(lar) :

Tirnakli , U , Ananos , GFJ , Tsallis , C

Yıl :

2001

Physics Letters A

Özet Ek Bilgiler

We numerically calculate, at the edge of chaos, the time evolution of the nonextensive entropic form S-q equivalent to [1 - Sigma (W)(i=1) P-i(q)]/[q-1] (with S-1 equivalent to -Sigma (W)(i=1) pi ln pi) for two families of one-dimensional dissipative maps, namely a logistic-like and a generalized cosine with arbitrary inflexion z at their maximum. At t = 0 we choose N initial conditions inside one of the W small windows in which the accessible phase space is partitioned; to neutralize large fluctuations we conveniently average over a large amount of initial windows. We verify that one and only one value q* < 1 exists such that the lim(t --> infinity)limW(--> infinity) limN(--> infinity) S-q (t)/t is finite, thus generalizing the (ensemble version of the) Kolmogorov-Sinai entropy (which corresponds to q* = 1 in the present formalism). This special, z-dependent, value q* numerically coincides, for both families of maps and all z, with the one previously found through two other independent procedures (sensitivity to the initial conditions and multifractal 0 f (alpha) function). (C) 2001 Elsevier Science B.V. All rights reserved.

Anahtar Kelimeler : article

Cilt: 289
Sayı: 01.Feb
ISSN: 0375-9601

6

On the way towards a generalized entropy maximization procedure

Dergi Makalesi

Kaynak :

DSpace Makaleler

Dergi:

Physics Letters A

Yayıncı:

Elsevier Science Bv

Yazar(lar) :

Bagci G. Baris , Tirnakli Ugur

Konu :

Entropy maximization procedure, Generalized entropies

Yıl :

2009

Physics Letters A

Özet Ek Bilgiler

We propose a generalized entropy maximization procedure, which takes into account the generalized averaging procedures and information gain definitions underlying the generalized entropies. This novel generalized procedure is then applied to Renyi and Tsallis entropies. The generalized entropy maximization procedure for Renyi entropies results in the exponential stationary distribution asymptotically for q is an element of (0, 1] in contrast to the stationary distribution of the inverse power law obtained through the ordinary entropy maximization procedure. Another result of the generalized entropy maximization procedure is that one can naturally obtain all the possible stationary distributions associated with the Tsallis entropies by employing either ordinary or q-generalized Fourier transforms in the averaging procedure. (C) 2009 Elsevier B.V. All rights reserved.

Anahtar Kelimeler : Entropy maximization procedure, Generalized entropies, article

Cilt: 373
Sayı: 36
ISSN: 0375-9601

Sınıflandırma :

İstatistik %97

İstatistik %78

7

Bond distortions in armchair type single wall carbon nanotubes

Dergi Makalesi

Kaynak :

DSpace Makaleler

Dergi:

Physics Letters A

Yayıncı:

Elsevier Science Bv

Yazar(lar) :

N Sunel , E Rizaoglu , K Harigaya , O Ozsoy

Konu :

SSH Hamiltonian, armchair nanotube, constraint, bond alternations

Yıl :

2005

Physics Letters A

Özet Ek Bilgiler

The energy band gap structure and stability of (3, 3) and (10, 10) nanotubes have been comparatively investigated in the frameworks of the traditional form of the Su-Schrieffer-Heeger (SSH) model and a toy model including the contributions of bonds of different types to the SSH Hamiltonian differently. Both models give the same energy band gap structure but bond length distortions in different characters for the nanotubes. (c) 2005 Published by Elsevier B.V.

Anahtar Kelimeler : SSH Hamiltonian, armchair nanotube, constraint, bond alternations, article

Cilt: 338
Sayı: 3-5
ISSN: 0375-9601

Sınıflandırma :

Fizik %98

Nano Ölçekli Bilim ve Teknoloji %100

8

Dimensionality effects for the spin-3

Dergi Makalesi

Kaynak :

DSpace Makaleler

Dergi:

Physics Letters A

Yayıncı:

Elsevier

Yazar(lar) :

C Ekiz

Konu :

Blume-Capel model, Bethe lattice, exact recursion relations

Yıl :

2004

Physics Letters A

Özet Ek Bilgiler

The antiferromagnetic spin-3/2 Blume-Capel model in an external magnetic field is formulated on the Bethe lattice by means of the exact recursion relations. This allows one to study the critical properties of the model as the properties of the iteration sequence (x(n), y(n), z(n)) in the limit n --> infinity. It is shown that the decomposition of the tricritical point into a critical end point and a double critical point for coordination number q = 6. (C) 2004 Elsevier B.V. All rights reserved.

Anahtar Kelimeler : Blume-Capel model, Bethe lattice, exact recursion relations, article

Cilt: 325
Sayı: 2
ISSN: 0375-9601

Sınıflandırma :

Fizik %100

Matematiksel ve Hesaplamalı Fizik %48

9

Hysteretic behavior in an Ising model with crystal-field potential: A Bethe lattice approach

Dergi Makalesi

Kaynak :

DSpace Makaleler

Dergi:

Physics Letters A

Yayıncı:

Elsevier

Yazar(lar) :

C Ekiz

Konu :

critical phenomena, hysteresis, Ising model, Bethe lattice

Yıl :

2006

Physics Letters A

Özet Ek Bilgiler

The low-temperature behavior of the hysteresis loop in the Ising model with crystal-field under uniform longitudinal magnetic field is studied by exact recursion relations on the Bethe lattice. The field dependences of the magnetization are examined in detail. The hysteresis curves are obtained for different temperatures (T): It is found that the hysteresis loops disappear in a certain temperature value. A number of characteristic behaviors for field variations are obtained especially for antiferromagnetic interaction. (c) 2005 Elsevier B.V. All rights reserved.

Anahtar Kelimeler : critical phenomena, hysteresis, Ising model, Bethe lattice, article

Cilt: 349
Sayı: 1-4
ISSN: 0375-9601

Sınıflandırma :

Fizik %100

Süperiletkenlik %67

Karmaşık Sistemler %23

10

Sound attenuation in a spin-1 Ising system near the critical temperature

Dergi Makalesi

Kaynak :

DSpace Makaleler

Dergi:

Physics Letters A

Yayıncı:

Elsevier Science Bv

Yazar(lar) :

R Erdem , M Keskin

Konu :

spin-1 Ising system, onsager theory of irreversible thermodynamics, sound attenuation, attenuation peaks

Yıl :

2001

Physics Letters A

Özet Ek Bilgiler

Sound attenuation coefficient is calculated for a spin-1 Ising system on the basis of Onsager theory of irreversible processes and its behaviour near the second-order phase transition point or the critical point is analyzed according to various values of Onsager or phenomenological rate coefficients (gamma (ij)). For all gamma (S) and gamma (Q) values it is observed that the sound attenuation peaks occur below T-C and depend on frequency (omega) and on the value of the off-diagonal Onsager coefficient (gamma). On the other hand, in the hydrodynamic regime the attenuation converges to zero with a mean field exponent (lambda = 1.0) just below the transition, while it vanishes above the critical temperature and then remains temperature-independent. Moreover, the behaviour of the sound attenuation as a function of frequency is also investigated and omega (2) dependence is observed for the attenuation coefficient. These results are in a good agreement with ultrasonic investigations of some magnetic systems, such as MnF2, qFeF(2), and RbMnF3. (C) 2001 Elsevier Science B.V. All rights reserved.

Anahtar Kelimeler : spin-1 Ising system, onsager theory of irreversible thermodynamics, sound attenuation, attenuation peaks, article

Cilt: 291
Sayı: 2-3
ISSN: 0375-9601

Sınıflandırma :

Fizik %100

Optik ve Plazma Fiziği %35

11

Fractional diffusion-wave problem in cylindrical coordinates

Dergi Makalesi

Kaynak :

DSpace Makaleler

Dergi:

Physics Letters A

Yayıncı:

Physics Letters A

Yazar(lar) :

Necati Özdemir , Derya Karadeniz

Konu :

Fractional Derivative, Fractional Diffusion-Wave System, Axial Symmetry, Grunwald-Letnikov Approach, Cylindrical Coordinates

Yıl :

2008

Physics Letters A

Özet Ek Bilgiler

in this Letter, we present analytical and numerical solutions for an axis-symmetric diffusion-wave equation. For problem formulation. the fractional time derivative is described in the sense of Riemann-Liouville. The analytical solution of the problem is determined by using the method of separation of variables. Eigenfunctions whose linear combination constitute the closed form of the solution are obtained. For numerical computation, the fractional derivative is approximated using the Grunwald-Letnikov scheme. Simulation results are given for different values of order of fractional derivative. We indicate the effectiveness of numerical scheme by comparing the numerical and the analytical results for alpha = 1 which represents the order of derivative.

Anahtar Kelimeler : Fractional Derivative, Fractional Diffusion-Wave System, Axial Symmetry, Grunwald-Letnikov Approach, Cylindrical Coordinates, article

ISSN: 0375-9601

12

A Fractal Approach To Entropy and Distribution-Functions

Dergi Makalesi

Kaynak 1:

DSpace Makaleler

Kaynak 2:

DSpace Makaleler

Dergi:

Physics Letters A

Yayıncı:

Elsevier Science Bv

Yazar(lar) :

Buyukkilic , F , Demirhan , D

Yıl :

1993

Physics Letters A

Yayıncı Web Siteleri

Özet Ek Bilgiler

The spectrum of fractal dimensions D(q) of non-interacting classical and quantum gases in non-equilibrium, whose states are described by the set of occupation number {n1, n2, ..., n(K)}, has been obtained. With this point of departure, the fractal inspired entropies of the related gases have been deduced. The generalized non-exponential forms of the distribution functions have been found by the application of Boltzmann's H-theorem.

Kaynak 1: https://acikerisim.ege.edu.tr/xmlui/handle/11454/33801 arayıcılığı görüntüle.
Kaynak 2: https://acikerisim.ege.edu.tr/xmlui/handle/11454/28281 arayıcılığı görüntüle.

Anahtar Kelimeler : article

Cilt: 181
Sayı: 1
ISSN: 0375-9601

Sınıflandırma :

Fizik %58

Karmaşık Sistemler %48

Matematik %36

Dinamik Sistemler ve Ergodik Teori %26

13

Exact solutions of the Schrodinger equation for the deformed hyperbolic potential well and the deformed four-parameter exponential type potential

Dergi Makalesi

Kaynak :

DSpace Makaleler

Dergi:

Physics Letters A

Yayıncı:

Elsevier Science Bv

Yazar(lar) :

Egrifes , H , Demirhan , D , Buyukkilic , F

Yıl :

2000

Physics Letters A

Özet Ek Bilgiler

Exact solutions of the Schrodinger equation for two 'deformed hyperbolic potentials' that were introduced by Arai [J. Math. Anal. Appl. 158 (1991) 63] have been obtained by using an analytical solution method which has been developed by Nikiforov and Uvarov [Special Functions of Mathematical Physics, Birkhauser, Basel, 1988] for the solutions of the differential equations of hypergeometric type in which the solutions are special functions. (C) 2000 Published by Elsevier Science B.V.

Anahtar Kelimeler : article

Cilt: 275
Sayı: 4
ISSN: 0375-9601

Sınıflandırma :

Matematik %100

14

A Statistical-Mechanical Approach To Generalized Statistics of Quantum and Classical Gases

Dergi Makalesi

Kaynak 1:

DSpace Makaleler

Kaynak 2:

DSpace Makaleler

Dergi:

Physics Letters A

Yayıncı:

Elsevier Science Bv

Yazar(lar) :

Buyukkilic , F , Demirhan , D , Gulec , A

Yıl :

1995

Physics Letters A

Yayıncı Web Siteleri

Özet Ek Bilgiler

For many particle non-interacting gases which are in heat and particle baths the grand canonical ensemble concept has been set out. The set of occupation numbers of the R quantum states of the gas is described by {n(1), n(2),..., n(k),...}. As the entropy of the ensemble, one of the fractal inspired entropies, namely T sallis entropy, has been considered and expressed for the ensemble. The probability P-R of the ensemble to be in the slate R has been investigated for the equilibrium state, by making use of the Boltzmann H-theorem with the techniques of calculus of variations. Having obtained the probability P-R, the generalized distribution functions of the quantum gases have been established. On the other hand, the generalized distribution functions of the classical gases have been found as a special case of one of the quantum gases, namely the boson gas.

Kaynak 1: https://acikerisim.ege.edu.tr/xmlui/handle/11454/33636 arayıcılığı görüntüle.
Kaynak 2: https://acikerisim.ege.edu.tr/xmlui/handle/11454/28161 arayıcılığı görüntüle.

Anahtar Kelimeler : article

Cilt: 197
Sayı: 3
ISSN: 0375-9601

Sınıflandırma :

Fizik %84

İstatistik Fizik ve Dinamik Sistemler %56

15

On the stabilization of periodic orbits for discrete time chaotic systems

Dergi Makalesi

Kaynak :

DSpace Makaleler

Dergi:

Physics Letters A

Yayıncı:

Elsevier

Yazar(lar) :

Ö. Morgül

Konu :

Chaos control, Chaotic systems, Delayed feedback, Pyragas controller, Article, Mathematical analysis, Oscillation, Physics, Simulation

Yıl :

2005

Physics Letters A

Özet Ek Bilgiler

In this Letter we consider the stabilization problem of unstable periodic orbits of discrete time chaotic systems. We propose a novel and simple periodic delayed feedback law and present some stability results. These results show that all hyperbolic periodic orbits as well as some non-hyperbolic periodic orbits can be stabilized with the proposed method. The stability proofs also give the possible feedback gains which achieve stabilization. We will also present some simulation results.

DOI : 10.1016/j.physleta.2004.11.057

Anahtar Kelimeler : Chaos control, Chaotic systems, Delayed feedback, Pyragas controller, Article, Mathematical analysis, Oscillation, Physics, Simulation, Article

Cilt: 335
Sayı: 2-3
ISSN: 0375-9601
Sayfa: 127-138

Sınıflandırma :

Matematik %100

Dinamik Sistemler ve Ergodik Teori %62

Fark ve Fonksiyonel Denklemler %35

16

EXACT PATH-INTEGRAL SOLUTION OF THE RING-SHAPED POTENTIAL

Dergi Makalesi

Kaynak :

DSpace Makaleler

Dergi:

PHYSICS LETTERS A

Yayıncı:

ELSEVIER SCIENCE BV

Yazar(lar) :

I SOKMEN

Yıl :

1986

PHYSICS LETTERS A

Piri Tam Metin Bulucu Ek Bilgiler

DOI : 10.1016/0375-9601(86)90546-3

Anahtar Kelimeler : article

ISSN: 0375-9601

Sınıflandırma :

Matematik %44

Fizik %29

17

Dynamics of a spin-boson model with structured spectral density

Dergi Makalesi

Kaynak :

DSpace Makaleler

Dergi:

Physics Letters A

Yayıncı:

Elsevier Science Bv

Yazar(lar) :

Arzu Kurt , Resul Eryigit

Konu :

Structured spectral density, Spin-boson model, Bath correlation functions

Yıl :

2018

Physics Letters A

Özet Ek Bilgiler

We report the results of a study of the dynamics of a two-state system coupled to an environment with peaked spectral density. An exact analytical expression for the bath correlation function is obtained. Validity range of various approximations to the correlation function for calculating the population difference of the system is discussed as function of tunneling splitting, oscillator frequency, coupling constant, damping rate and the temperature of the bath. An exact expression for the population difference, for a limited range of parameters, is derived. (C) 2018 Elsevier B.V. All rights reserved.

Anahtar Kelimeler : Structured spectral density, Spin-boson model, Bath correlation functions, article

Cilt: 382
Sayı: 19
ISSN: 0375-9601

Sınıflandırma :

Fizik %80

Kuantum Fiziği %19

18

Ising model with dipole-quadrupole interaction on a Cayley tree: reentrant phase transitions

Dergi Makalesi

Kaynak :

DSpace Makaleler

Dergi:

Physics Letters A

Yayıncı:

Elsevier

Yazar(lar) :

C Ekiz

Konu :

Ising model, Cayley tree, bethe lattice, dipole-quadrupole interaction

Yıl :

2004

Physics Letters A

Özet Ek Bilgiler

We formulate the Ising model with dipole-quadrupole interaction on a Cayley tree. As a function of coordination number, we discuss the reentrant character of phase boundaries. A critical line separates the disordered and antiferromagnetic phases. An interesting fact is that the model does not have any tricritical and multicritical points. (C) 2004 Elsevier B.V. All rights reserved.

Anahtar Kelimeler : Ising model, Cayley tree, bethe lattice, dipole-quadrupole interaction, article

Cilt: 332
Sayı: 1-2
ISSN: 0375-9601

Sınıflandırma :

Fizik %99

İstatistik Fizik ve Dinamik Sistemler %79

19

Effect of the off-diagonal Onsager rate coefficient on the relaxation times in a spin-1 Ising system

Dergi Makalesi

Kaynak :

DSpace Makaleler

Dergi:

Physics Letters A

Yayıncı:

Elsevier Science Bv

Yazar(lar) :

M Keskin , R Erdem

Konu :

spin-1 Ising system, relaxation times, Onsager coefficients

Yıl :

2002

Physics Letters A

Özet Ek Bilgiler

As a continuation of our previously published works, we used the lowest approximation of the cluster variation method that is identical to the mean-field approximation and linearized equations of motions which are obtained by the Onsager reciprocity theorem to study the effect of the off-diagonal Onsager rate coefficient (gamma) on the relaxation times tau(1) and tau(2) near the critical point of the spin-1 Ising system. The temperature variations of the relaxation times have been studied for different values of the kinetic coefficient (gamma) which couples the dipolar and quadrupolar order currents in the system. Below and above the critical temperature (T-C), a maximum of tau(2) is observed according to the values of off-diagonal coefficient (gamma). (C) 2002 Elsevier Science B.V. All rights reserved.

Anahtar Kelimeler : spin-1 Ising system, relaxation times, Onsager coefficients, article

Cilt: 297
Sayı: 5-6
ISSN: 0375-9601

Sınıflandırma :

Fizik %99

Optik ve Plazma Fiziği %25

İstatistik Fizik ve Dinamik Sistemler %22

20

Solutions of singular IVPs of Lane-Emden type by homotopy perturbation method

Dergi Makalesi

Kaynak :

DSpace Makaleler

Dergi:

Physics Letters A

Yayıncı:

Elsevier Science Bv

Yazar(lar) :

Yildirim Ahmet , Oezis Turgut

Konu :

He's homotopy perturbation method, singular IVPs, Lane-Emden equation

Yıl :

2007

Physics Letters A

Özet Ek Bilgiler

A new scheme, deduced from He's homotopy perturbation method, is presented for solving Lane-Emden type singular IVPs problem. The scheme is shown to be highly accurate, and only a few terms are required to obtain accurate computable solutions. (C) 2007 Elsevier B.V. All rights reserved.

Anahtar Kelimeler : He's homotopy perturbation method, singular IVPs, Lane-Emden equation, article

Cilt: 369
Sayı: 01.Feb
ISSN: 0375-9601

Sınıflandırma :

Matematik %100

Matematik Uygulamaları %35

21

Operational approach to quantum limits on polarization measurement

Dergi Makalesi

Kaynak :

DSpace Makaleler

Dergi:

Physics Letters A

Yayıncı:

Elsevier

Yazar(lar) :

T. Hakioğlu , A. S. Shumovsky , O. Aytür

Yıl :

1994

Physics Letters A

Özet Ek Bilgiler

We discuss the polarization measurement of a fully polarized coherent field in the weak intensity quantum limit within the framework of operational approach which was recently discussed by Noh, Fougéres and Mandel. We mainly focus on the fluctuations in the measurement of the parameters of polarization and on the uncertainty relations between them. A dependence of these parameters and their quantum fluctuations on the parameters of the initial coherent field is found. © 1994.

DOI : 10.1016/0375-9601(94)91255-6

Anahtar Kelimeler : Article

Cilt: 194
Sayı: 4
ISSN: 0375-9601
Sayfa: 304-309

Sınıflandırma :

Fizik %98

22

On the stability of delayed feedback controllers for discrete time systems

Dergi Makalesi

Kaynak :

DSpace Makaleler

Dergi:

Physics Letters A

Yayıncı:

Elsevier

Yazar(lar) :

Ö. Morgül

Konu :

Chaos control, Chaotic systems, Delayed feedback, Pyragas controller

Yıl :

2005

Physics Letters A

Özet Ek Bilgiler

We consider the stability of delayed feedback control (DFC) scheme for multi-dimensional discrete time systems. We first construct a map whose fixed points correspond to the periodic orbits of the uncontrolled system. Then the stability of the DFC is analyzed as the stability of the corresponding equilibrium point of the constructed map. For each periodic orbit, we construct a characteristic polynomial whose Schur stability corresponds to the stability of DFC scheme. © 2005 Elsevier B.V. All rights reserved.

DOI : 10.1016/j.physleta.2004.12.006

Anahtar Kelimeler : Chaos control, Chaotic systems, Delayed feedback, Pyragas controller, Article

Cilt: 335
Sayı: 1
ISSN: 0375-9601
Sayfa: 31-42

Sınıflandırma :

Matematik %100

Fark ve Fonksiyonel Denklemler %92

23

Conditions for observation of Rabi oscillations in an exciton-polariton system

Dergi Makalesi

Kaynak :

DSpace Makaleler

Dergi:

Physics Letters A

Yayıncı:

Elsevier BV

Yazar(lar) :

A. S. Shumovsky , Ö. E. Müstecaplioǧlu

Konu :

Excitons, Microcavities, Polaritons, Rabi oscillations

Yıl :

1995

Physics Letters A

Özet Ek Bilgiler

The pure quantum model describing Rabi oscillations of exciton-polaritons (EP) in a micro-cavity with finite quality is considered. It is shown that the oscillations can be observed if the cavity damping rate does not exceed some critical value depending on the EP coupling constant and the detuning of the cavity mode. An explicit expression for the renormalized Rabi frequency is found. Comparison of the results with experimental data shows a good agreement. © 1995.

DOI : 10.1016/0375-9601(95)00753-5

Anahtar Kelimeler : Excitons, Microcavities, Polaritons, Rabi oscillations, Article

Cilt: 209
Sayı: 1-2
ISSN: 0375-9601
Sayfa: 88-94

Sınıflandırma :

Fizik %100

Kuantum Gazları ve Kondensatları %56

24

Relation between quantum statistics of phonons and scattered light

Dergi Makalesi

Kaynak :

DSpace Makaleler

Dergi:

Physics Letters A

Yayıncı:

Elsevier BV

Yazar(lar) :

A. S. Shumovsky , Bilal Tanatar

Yıl :

1993

Physics Letters A

Özet Ek Bilgiler

The resonance model of the Raman process with the generation of a Stokes component is solved exactly. The asymptotic behavior of the solution is discussed. Mandel's Q-factor is calculated as a function of time both for the Stokes and the Rayleigh components for their dependence on the quantum statistical properties of the vibration mode (phonons). A qualitative difference between the cases of uncorrelated and correlated phonons is found which may have interesting experimental implications. © 1993.

DOI : 10.1016/0375-9601(93)90417-X

Anahtar Kelimeler : Article

Cilt: 182
Sayı: 4-6
ISSN: 0375-9601
Sayfa: 411-416

Sınıflandırma :

Fizik %99

Klasik Mekanik %31

25

Many-body effects in a two-component, one-dimensional electron gas with repulsive, short-range interactions

Dergi Makalesi

Kaynak :

DSpace Makaleler

Dergi:

Physics Letters A

Yayıncı:

Elsevier

Yazar(lar) :

Bilal Tanatar

Konu :

A Two-component, One-dimensional Electron Gas, Repulsive, Electron, Interaction energy, Interactions

Yıl :

1998

Physics Letters A

Özet Ek Bilgiler

We investigate the correlation effects in a two-component, one-dimensional electron gas interacting via repulsive δ function interactions. Electron correlations are treated within the approximation scheme of Singwi, Tosi, Land, and Sjölander (STLS) which yields analytical expressions for the local-field corrections. The static structure factors, pair distribution functions, collective excitation modes, and interaction energy in a two-component system are discussed. © 1998 Elsevier Science B.V.

DOI : 10.1016/S0375-9601(98)00029-2

Anahtar Kelimeler : A Two-component, One-dimensional Electron Gas, Repulsive, Electron, Interaction energy, Interactions, Article

Cilt: 239
Sayı: 4-5
ISSN: 0375-9601
Sayfa: 300-306

Sınıflandırma :

Fizik %94

Kuantum Gazları ve Kondensatları %20

26

EXACT PATH INTEGRAL SOLUTION TO THE INFINITE SQUARE-WELL

Dergi Makalesi

Kaynak :

DSpace Makaleler

Dergi:

PHYSICS LETTERS A

Yayıncı:

ELSEVIER SCIENCE BV

Yazar(lar) :

I SOKMEN

Yıl :

1984

PHYSICS LETTERS A

Piri Tam Metin Bulucu Ek Bilgiler

DOI : 10.1016/0375-9601(84)91010-7

Anahtar Kelimeler : article

ISSN: 0375-9601

Sınıflandırma :

Matematik %74

Fizik %24

Kuantum Alan Teorileri %20

27

Peculiarities of biphasic regions at phase transitions in oriented textures of 4-cyano-4 '-n-pentylbiphenyl

Dergi Makalesi

Kaynak :

DSpace Makaleler

Dergi:

Physics Letters A

Yayıncı:

Elsevier

Yazar(lar) :

Arif Nesrullajev , Nejmettin Avci , Sener Oktik

Konu :

liquid crystal, nematic, thermotropic properties, optical transmission, phase transition, biphasic region, texture

Yıl :

2007

Physics Letters A

Özet Ek Bilgiler

Peculiarities of the biphasic regions at the direct and reverse phase transitions between homeotropic oriented nematic mesophase and isotropic liquid have been investigated in detail in this work. The shift of phase transition temperatures to the low temperatures by the reverse phase transitions have been observed for this mesophase. Nonlinearity of thermotropic and thermo-optical properties at the phase transitions between nematic mesophase, and isotropic liquid have been found. (c) 2006 Elsevier B.V. All rights reserved.

Anahtar Kelimeler : liquid crystal, nematic, thermotropic properties, optical transmission, phase transition, biphasic region, texture, article

Cilt: 364
Sayı: 6
ISSN: 0375-9601

Sınıflandırma :

Fizik %100

Spektroskopi ve Spektrometri %61

Optik Cihazlar %32

28

Fourth-order master equation for a charged harmonic oscillator interacting with the electromagnetic field

Dergi Makalesi

Kaynak :

DSpace Makaleler

Dergi:

Physics Letters A

Yayıncı:

Elsevier Science Bv

Yazar(lar) :

Arzu Kurt , Resul Eryigit

Konu :

Charged harmonic oscillator, Fourth-order master equation, Velocity-coupling

Yıl :

2015

Physics Letters A

Özet Ek Bilgiler