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Nonlocal Fordy-Kulish equations on symmetric spaces
Dergi Makalesi

Dergi Makalesi Open Access
Kaynak :
DSpace Makaleler
Yayıncı :
Physics Letters A
Yazar(lar) :
Metin Gürses
Konu :
Fordy–Kulish system, Nonlinear Schrodinger equations, Nonlocal integrable equations
Yıl :
2017
Physics Letters A
Yayıncı Web Sitesi Tam Metin
Kaydet
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 :
2
Mesoscopic Fano effect in a spin splitter with a side-coupled quantum dot
Dergi Makalesi

Dergi Makalesi Open Access
Kaynak :
DSpace Makaleler
Yayıncı :
Physics Letters A
Yazar(lar) :
V. Moldoveanu , M. Tolea , Bilal Tanatar
Konu :
Fano effect, Mesoscopic rings, Rashba spin-orbit coupling
Yıl :
2012
Physics Letters A
Yayıncı Web Sitesi Tam Metin
Kaydet
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 Greens 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 :
3
Hamiltonian structure of the Lotka-Volterra equations
Dergi Makalesi

Dergi Makalesi Open Access
Kaynak :
DSpace Makaleler
Yayıncı :
Physics Letters A
Yazar(lar) :
Y. Nutku
Yıl :
1990
Physics Letters A
Yayıncı Web Sitesi Tam Metin
Kaydet
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 :
4
EXACT PATH INTEGRAL SOLUTION OF A CLASS OF POTENTIALS RELATED TO THE RIGID ROTATOR
Dergi Makalesi

Dergi Makalesi
Kaynak :
DSpace Makaleler
Yayıncı :
PHYSICS LETTERS A
Yazar(lar) :
NK PAK , I SOKMEN
Yıl :
1984
PHYSICS LETTERS A
Yayıncı Web Sitesi Piri Tam Metin Bulucu
Kaydet
DOI : 10.1016/0375-9601(84)90463-8
Anahtar Kelimeler : article

ISSN: 0375-9601
Sınıflandırma :
5
Generalization of the Kolmogorov-Sinai entropy: logistic-like and generalized cosine maps at the chaos threshold
Dergi Makalesi

Dergi Makalesi
Kaynak :
DSpace Makaleler
Yayıncı :
Physics Letters A
Yazar(lar) :
Tirnakli , U , Ananos , GFJ , Tsallis , C
Yıl :
2001
Physics Letters A
Yayıncı Web Sitesi
Kaydet
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

Dergi Makalesi
Kaynak :
DSpace Makaleler
Yayıncı :
Physics Letters A
Yazar(lar) :
Bagci G. Baris , Tirnakli Ugur
Konu :
Entropy maximization procedure, Generalized entropies
Yıl :
2009
Physics Letters A
Yayıncı Web Sitesi
Kaydet
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 :
7
The maximization of Tsallis entropy with complete deformed functions and the problem of constraints
Dergi Makalesi

Dergi Makalesi
Kaynak :
DSpace Makaleler
Yayıncı :
Physics Letters A
Yazar(lar) :
Oikonomou Thomas , Bagci G. Baris
Konu :
q-logarithm, q-exponential, Tsallis entropy, Ordinary average, Escort average
Yıl :
2010
Physics Letters A
Yayıncı Web Sitesi
Kaydet
By only requiring the q deformed logarithms (q exponentials) to possess arguments chosen from the entire set of positive real numbers (all real numbers), we show that the q-logarithm (q exponential) can be written in such a way that its argument varies between 0 and 1 (among negative real numbers) for 1 <= q < 2, while the interval 0 < q <= 1 corresponds to any real argument greater than 1 (positive real numbers). These two distinct intervals of the nonextensivity index q, also the expressions of the deformed functions associated with them, are related to one another through the relation (2 - q), which is so far used to obtain the ordinary stationary distributions from the corresponding escort distributions. and vice versa in an almost ad hoc manner. This shows that the escort distributions are only a means of extending the interval of validity of the deformed functions to the one of ordinary, undeformed ones. Moreover, we show that, since the Tsallis entropy is written in terms of the q-logarithm and its argument, being the inverse of microstate probabilities, takes values equal to or greater than 1, the resulting stationary solution is uniquely described by the one obtained from the ordinary constraint. Finally, we observe that even the escort stationary distributions can be obtained through the use of the ordinary averaging procedure if the argument of the q-exponential lies in (-infinity, 0]. However, this case corresponds to, although related, a different entropy expression than the Tsallis entropy. (C) 2010 Elsevier B.V. All rights reserved.
Anahtar Kelimeler : q-logarithm, q-exponential, Tsallis entropy, Ordinary average, Escort average, article
Cilt: 374
Sayı: 22
ISSN: 0375-9601
8
Numerical solution of 3D Green's function for the dynamic system of anisotropic elasticity
Dergi Makalesi

Dergi Makalesi
Kaynak :
DSpace Makaleler
Yayıncı :
Physics Letters A
Yazar(lar) :
Kocak Hueseyin , Yildirim Ahmet
Konu :
Homotopy perturbation method, 2D wave equation, Green's functions, Dynamic system of anisotropic elasticity
Yıl :
2009
Physics Letters A
Yayıncı Web Sitesi
Kaydet
In this Letter, we used homotopy perturbation method to obtain numerical solution of the 3D Greens function for the dynamic system of anisotropic elasticity. Application of homotopy perturbation method to this problem shows the rapid convergence of the sequence constructed by this method to the exact solution. The numerical results obtained from convolution of Greens function and data of the Cauchy problem are compared with the exact solution for cubic media. The results reveal that the proposed method is very effective and simple. (C) 2009 Elsevier B.V. All rights reserved.
Anahtar Kelimeler : Homotopy perturbation method, 2D wave equation, Green's functions, Dynamic system of anisotropic elasticity, article
Cilt: 373
Sayı: 35
ISSN: 0375-9601
Sınıflandırma :
9
Bound states of the Dirac equation for the PT-symmetric generalized Hulthen potential by the Nikiforov-Uvarov method
Dergi Makalesi

Dergi Makalesi
Kaynak :
DSpace Makaleler
Yayıncı :
Physics Letters A
Yazar(lar) :
Egrifes H , Sever R
Konu :
Dirac equation, non-Hermitian Hamiltonians, PT-symmetry, pseudo-hermiticity, Hulthen potential, bound-states, exact solutions
Yıl :
2005
Physics Letters A
Yayıncı Web Sitesi
Kaydet
The one-dimensional Dirac equation is solved for the PT-symmetric generalized Hulthen potential. The Nikiforov-Uvarov method which is based on solving the second-order linear differential equations by reduction to a generalized equation of hypergeometric type is used to obtain exact energy eigenvalues and corresponding eigenfunctions. (c) 2005 Elsevier B.V. All rights reserved.
Anahtar Kelimeler : Dirac equation, non-Hermitian Hamiltonians, PT-symmetry, pseudo-hermiticity, Hulthen potential, bound-states, exact solutions, article
Cilt: 344
Sayı: 02.Apr
ISSN: 0375-9601
Sınıflandırma :
10
An integrable family of Monge-Ampère equations and their multi-Hamiltonian structure
Dergi Makalesi

Dergi Makalesi Open Access
Kaynak :
DSpace Makaleler
Yayıncı :
Physics Letters A
Yazar(lar) :
Y. Nutku , Ö. Sarıoğlu
Yıl :
1993
Physics Letters A
Yayıncı Web Sitesi Tam Metin
Kaydet
We have identified a completely integrable family of Monge-Ampère equations through an examination of their Hamiltonian structure. Starting with a variational formulation of the Monge-Ampère equations we have constructed the first Hamiltonian operator through an application of Diracs theory of constraints. The completely integrable class of Monge-Ampère equations are then obtained by solving the Jacobi identities for a sufficiently general form of the second Hamiltonian operator that is compatible with the first. © 1993.
DOI : 10.1016/0375-9601(93)90277-7
Anahtar Kelimeler : Article
Cilt: 173
Sayı: 3
ISSN: 0375-9601
Sayfa: 270-274
Sınıflandırma :
Matematik %100
11
EXACT PATH INTEGRAL SOLUTION OF A CHARGED-PARTICLE IN A CLASS OF TIME-DEPENDENT, AXIALLY-SYMMETRICAL ELECTROMAGNETIC-FIELDS
Dergi Makalesi

Dergi Makalesi
Kaynak :
DSpace Makaleler
Yayıncı :
PHYSICS LETTERS A
Yazar(lar) :
I SOKMEN
Yıl :
1986
PHYSICS LETTERS A
Yayıncı Web Sitesi Piri Tam Metin Bulucu
Kaydet
DOI : 10.1016/0375-9601(86)90096-4
Anahtar Kelimeler : article

ISSN: 0375-9601
Sınıflandırma :
Fizik %49
12
EXACT PATH-INTEGRAL SOLUTION FOR A CHARGED-PARTICLE IN A COULOMB PLUS AHARONOV-BOHM POTENTIAL
Dergi Makalesi

Dergi Makalesi
Kaynak :
DSpace Makaleler
Yayıncı :
PHYSICS LETTERS A
Yazar(lar) :
I SOKMEN
Yıl :
1988
PHYSICS LETTERS A
Yayıncı Web Sitesi Piri Tam Metin Bulucu
Kaydet
DOI : 10.1016/0375-9601(88)90251-4
Anahtar Kelimeler : article

ISSN: 0375-9601
Sınıflandırma :
13
The effect of an intense laser field on magneto donors in semiconductors
Dergi Makalesi

Dergi Makalesi
Kaynak :
DSpace Makaleler
Yayıncı :
PHYSICS LETTERS A
Yazar(lar) :
H Sari , E Kasapoglu , I Sokmen
Konu :
quantum wells, impurities, intense field
Yıl :
2003
PHYSICS LETTERS A
Yayıncı Web Sitesi Piri Tam Metin Bulucu
Kaydet
The laser-field dependence of the binding energy of shallow-donor impurities in graded, and square quantum wells under the external magnetic field is calculated by a variational method and in the effective mass approximation. We have shown that, not only the dressed potential, but also the shape of the confinement potential, the strength of the external magnetic field parallel to the growth direction, and the impurity position play very important roles in the determining the binding energy of a hydrogenic impurity. (C) 2003 Elsevier Science B.V. All rights reserved.
DOI : 10.1016/S0375-9601(03)00456-0
Anahtar Kelimeler : quantum wells, impurities, intense field, article

ISSN: 0375-9601
Sınıflandırma :
Fizik %100
Fizik %20
14
Classical memoryless noise-induced maximally discordant mixed separable steady states
Dergi Makalesi

Dergi Makalesi
Kaynak :
DSpace Makaleler
Yayıncı :
Physics Letters A
Yazar(lar) :
Ferdi Altintas , Arzu Kurt , Resul Eryigit
Konu :
Quantum discord, Classical noise, Maximally discordant mixed state
Yıl :
2012
Physics Letters A
Yayıncı Web Sitesi
Kaydet
We have investigated the dynamics of quantum discord and entanglement for two qubits subject to independent global transverse and/or longitudinal memoryless noisy classical fields. Global transverse and/or longitudinal random fields are found to drive the system to maximally discordant mixed separable steady states for suitable initial conditions. Moreover, two independent noises in the system are found to enhance both the steady state randomness and quantum discord in the absence of entanglement for some initial states. (C) 2012 Elsevier B.V. All rights reserved.
Anahtar Kelimeler : Quantum discord, Classical noise, Maximally discordant mixed state, article
Cilt: 377
Sayı: 1-2
ISSN: 0375-9601
Sınıflandırma :
15
Time-dependent PT symmetric problems
Dergi Makalesi

Dergi Makalesi
Kaynak :
DSpace Makaleler
Yayıncı :
Physics Letters A
Yazar(lar) :
C Yuce
Yıl :
2005
Physics Letters A
Yayıncı Web Sitesi
Kaydet
In this Letter, we study the exactly solvable generalized PT symmetric harmonic oscillator problem. Some transformations are introduced for this problem to make the potential time-dependent. PT symmetry and the reality of energy eigenvalues are studied under these transformations. (C) 2005 Elsevier B.V. All rights reserved.
Cilt: 336
Sayı: 4-5
ISSN: 0375-9601
Sınıflandırma :
16
Analytical study of thermal entanglement in a two-dimensional J(1)-J(2) model
Dergi Makalesi

Dergi Makalesi
Kaynak :
DSpace Makaleler
Yayıncı :
Physics Letters A
Yazar(lar) :
Recep Eryigit , Irigit Gunduc , Resul Eryigit
Yıl :
2006
Physics Letters A
Yayıncı Web Sitesi
Kaydet
We have investigated the ground-state and the thermal entanglement properties of a two-dimensional frustrated spin 1/2 cluster by calculating the pairwise concurrence and negativity. It is found that an increase in temperature can lead to an enhancement of pairwise entanglement for a certain range of the frustration parameter. We have, also, found that negativity is equal to the half of the concurrence for the model considered here. (c) 2006 Elsevier B.V. All rights reserved.
Cilt: 358
Sayı: 5-6
ISSN: 0375-9601
Sınıflandırma :
17
A statistical mechanical approach to generalized statistics of quantum and classical gases
Dergi Makalesi

Dergi Makalesi
Kaynak :
DSpace Makaleler
Yayıncı :
Physics Letters A
Yazar(lar) :
Büyükiliç F. , Demirhan D. , Güleç A.
Yıl :
1995
Physics Letters A
Yayıncı Web Sitesi
Kaydet
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 {n1, n2, ..., nk, ...}. As the entropy of the ensemble, one of the fractal inspired entropies, namely Tsallis entropy, has been considered and expressed for the ensemble. The probability PR of the ensemble to be in the state 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 PR, 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. © 1995 Elsevier Science B.V. All rights reserved.
Anahtar Kelimeler : article
Cilt: 197
Sayı: 3
ISSN: 0375-9601
Sınıflandırma :
18
A fractal approach to entropy and distribution functions
Dergi Makalesi

Dergi Makalesi
Kaynak 1:
DSpace Makaleler
Kaynak 2:
DSpace Makaleler
Yayıncı :
Physics Letters A
Yazar(lar) :
Büyükkiliç F. , Demirham D.
Yıl :
1993
Physics Letters A
Kaydet
The spectrum of fractal dimensions Dq of non-interacting classical and quantum gases in non-equilibrium, whose states are described by the set of occupation numbers {n1, n2, ...nK}, has been obtained. With this point of departure, the fractal inspired entropies of the related gases have beem deduced. The generalized non-exponential forms of the distribution functions have been found by the application of Boltzmanns H-theorem. © 1993.
Anahtar Kelimeler : article
Cilt: 181
Sayı: 1
ISSN: 0375-9601
Sınıflandırma :
19
Solutions of singular IVPs of Lane-Emden type by homotopy perturbation method
Dergi Makalesi

Dergi Makalesi
Kaynak :
DSpace Makaleler
Yayıncı :
Physics Letters A
Yazar(lar) :
Yildirim Ahmet , Oezis Turgut
Konu :
He's homotopy perturbation method, singular IVPs, Lane-Emden equation
Yıl :
2007
Physics Letters A
Yayıncı Web Sitesi
Kaydet
A new scheme, deduced from Hes 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 :
20
Operational approach to quantum limits on polarization measurement
Dergi Makalesi

Dergi Makalesi Open Access
Kaynak :
DSpace Makaleler
Yayıncı :
Physics Letters A
Yazar(lar) :
T. Hakioğlu , A. S. Shumovsky , O. Aytür
Yıl :
1994
Physics Letters A
Yayıncı Web Sitesi Tam Metin
Kaydet
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
21
On the stability of delayed feedback controllers for discrete time systems
Dergi Makalesi

Dergi Makalesi Open Access
Kaynak :
DSpace Makaleler
Yayıncı :
Physics Letters A
Yazar(lar) :
Ö. Morgül
Konu :
Chaos control, Chaotic systems, Delayed feedback, Pyragas controller
Yıl :
2005
Physics Letters A
Yayıncı Web Sitesi Tam Metin
Kaydet
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 :
22
Conditions for observation of Rabi oscillations in an exciton-polariton system
Dergi Makalesi

Dergi Makalesi Open Access
Kaynak :
DSpace Makaleler
Yayıncı :
Physics Letters A
Yazar(lar) :
A. S. Shumovsky , Ö. E. Müstecaplioǧlu
Konu :
Excitons, Microcavities, Polaritons, Rabi oscillations
Yıl :
1995
Physics Letters A
Yayıncı Web Sitesi Tam Metin
Kaydet
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 :
23
Relation between quantum statistics of phonons and scattered light
Dergi Makalesi

Dergi Makalesi Open Access
Kaynak :
DSpace Makaleler
Yayıncı :
Physics Letters A
Yazar(lar) :
A. S. Shumovsky , Bilal Tanatar
Yıl :
1993
Physics Letters A
Yayıncı Web Sitesi Tam Metin
Kaydet
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. Mandels 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 :
24
Many-body effects in a two-component, one-dimensional electron gas with repulsive, short-range interactions
Dergi Makalesi

Dergi Makalesi Open Access
Kaynak :
DSpace Makaleler
Yayıncı :
Physics Letters A
Yazar(lar) :
Bilal Tanatar
Konu :
A Two-component, One-dimensional Electron Gas, Repulsive, Electron, Interaction energy, Interactions
Yıl :
1998
Physics Letters A
Yayıncı Web Sitesi Tam Metin
Kaydet
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 :
25
EXACT PATH INTEGRAL SOLUTION TO THE INFINITE SQUARE-WELL
Dergi Makalesi

Dergi Makalesi
Kaynak :
DSpace Makaleler
Yayıncı :
PHYSICS LETTERS A
Yazar(lar) :
I SOKMEN
Yıl :
1984
PHYSICS LETTERS A
Yayıncı Web Sitesi Piri Tam Metin Bulucu
Kaydet
DOI : 10.1016/0375-9601(84)91010-7
Anahtar Kelimeler : article

ISSN: 0375-9601
Sınıflandırma :
26
Peculiarities of biphasic regions at phase transitions in oriented textures of 4-cyano-4 '-n-pentylbiphenyl
Dergi Makalesi

Dergi Makalesi
Kaynak :
DSpace Makaleler
Yayıncı :
Physics Letters A
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
Yayıncı Web Sitesi
Kaydet
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 :
27
Fourth-order master equation for a charged harmonic oscillator interacting with the electromagnetic field
Dergi Makalesi

Dergi Makalesi
Kaynak :
DSpace Makaleler
Yayıncı :
Physics Letters A
Yazar(lar) :
Arzu Kurt , Resul Eryigit
Konu :
Charged harmonic oscillator, Fourth-order master equation, Velocity-coupling
Yıl :
2015
Physics Letters A
Yayıncı Web Sitesi
Kaydet
The master equation for a charged harmonic oscillator coupled to an electromagnetic reservoir is investigated up to fourth order in the interaction strength by using Krylov averaging method. The interaction is in the velocity-coupling form and includes a diamagnetic term. Exact analytical expressions for the second-, the third-, and the fourth-order contributions to mass renormalization, decay constant, normal and anomalous diffusion coefficients are obtained for the blackbody type environment. It is found that, generally, the third- and the fourth-order contributions have opposite signs when their magnitudes are comparable to that of the second-order one. (C) 2015 Elsevier B.V. All rights reserved.
Anahtar Kelimeler : Charged harmonic oscillator, Fourth-order master equation, Velocity-coupling, article
Cilt: 379
Sayı: 47-48
ISSN: 0375-9601
Sınıflandırma :
Fizik %97
28
Quantum correlations in non-Markovian environments
Dergi Makalesi

Dergi Makalesi
Kaynak :
DSpace Makaleler
Yayıncı :
Physics Letters A
Yazar(lar) :
Ferdi Altintas , Resul Eryigit
Konu :
Entanglement, Bell inequality violation, Quantum discord
Yıl :
2010
Physics Letters A
Yayıncı Web Sitesi
Kaydet
We have studied the analytical Markovian and non-Markovian dynamics of quantum correlations, such as entanglement, quantum discord and Bell nonlocalities for three noisy qubits. Quantum correlation as measured by quantum discord is found to be immune to death contrary to entanglement and Bell nonlocality for initial GHZ- or W-type mixed states. (c) 2010 Elsevier B.V. All rights reserved.
Anahtar Kelimeler : Entanglement, Bell inequality violation, Quantum discord, article
Cilt: 374
Sayı: 42
ISSN: 0375-9601
Sınıflandırma :
29
Fractional diffusion-wave problem in cylindrical coordinates
Dergi Makalesi

Dergi Makalesi Open Access
Kaynak :
DSpace Makaleler
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
Yayıncı Web Sitesi Tam Metin
Kaydet
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

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