International Journal of Theoretical Physics (INT J THEOR PHYS )

Publisher: Springer Verlag

Description

International Journal of Theoretical Physics publishes original research and reviews in theoretical physics and neighboring fields such as mathematics and the biological sciences. Dedicated to the unification of the latest physics research this journal seeks to both map the direction of future research arising from new analytical methods including the latest progress in the use of computers as well as to complement traditional physics research by providing fresh inquiry into quantum measurement theory relativistic field theory and other similarly fundamental areas.

  • Impact factor
    1.09
    Show impact factor history
     
    Impact factor
  • 5-year impact
    0.82
  • Cited half-life
    8.50
  • Immediacy index
    0.26
  • Eigenfactor
    0.01
  • Article influence
    0.20
  • Website
    International Journal of Theoretical Physics website
  • Other titles
    International journal of theoretical physics (Online), International journal of theoretical physics
  • ISSN
    0020-7748
  • OCLC
    39501197
  • Material type
    Document, Periodical, Internet resource
  • Document type
    Internet Resource, Computer File, Journal / Magazine / Newspaper

Publisher details

Springer Verlag

  • Pre-print
    • Author can archive a pre-print version
  • Post-print
    • Author can archive a post-print version
  • Conditions
    • Authors own final version only can be archived
    • Publisher's version/PDF cannot be used
    • On author's website or institutional repository
    • On funders designated website/repository after 12 months at the funders request or as a result of legal obligation
    • Published source must be acknowledged
    • Must link to publisher version
    • Set phrase to accompany link to published version (The original publication is available at www.springerlink.com)
    • Articles in some journals can be made Open Access on payment of additional charge
  • Classification
    ​ green

Publications in this journal

  • [Show abstract] [Hide abstract]
    ABSTRACT: We investigate Hawking radiation of charged and magnetized (scalar /fermion) particles from Demiański-Newman (DN) black holes using Hamilton-Jacobi (HJ) ansatz. Taking into account conservation of energy and the backreaction of particles to the spacetime, we calculate the emission rate and find it proportional to the change of Bekenstein-Hawking entropy. The radiation spectrum deviates from the precisely thermal one and is accordant with that obtained by the null geodesic method, but its physical picture is more clear. The investigation specifies a quantum-corrected radiation temperature dependent on the black hole background and the radiation particle’s energy, angular momentum, and charges.
    International Journal of Theoretical Physics 11/2014; 53(11).
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    ABSTRACT: Inthe present work we show that the existence of non-vanishing torsion field may solve, at least, one of the problems FRW-cosmology, the particle horizons problem. The field equations of general relativity (GR) are written in a space having non-vanishing torsion, the absolute parallelism (AP) space. An AP-Structure, satisfying the cosmological principle, is used to construct a world model. Energy density and pressure, purely induced by torsion, are defined from the building blocks of the AP-geometry using GR. When these quantities are used in the FRW-dynamical equations, we get a world model free from particle horizons.
    International Journal of Theoretical Physics 11/2014; 53(11).
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    ABSTRACT: This tutorial review of fractal-Cantorian spacetime and fractional calculus begins with Leibniz’s notation for derivative without limits which can be generalized to discontinuous media like fractal derivative and q-derivative of quantum calculus. Fractal spacetime is used to elucidate some basic properties of fractal which is the foundation of fractional calculus, and El Naschie’s mass-energy equation for the dark energy. The variational iteration method is used to introduce the definition of fractional derivatives. Fractal derivative is explained geometrically and q-derivative is motivated by quantum mechanics. Some effective analytical approaches to fractional differential equations, e.g., the variational iteration method, the homotopy perturbation method, the exp-function method, the fractional complex transform, and Yang-Laplace transform, are outlined and the main solution processes are given.
    International Journal of Theoretical Physics 11/2014; 53(11).
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    ABSTRACT: We investigate the entanglement dynamics of the two-qubit entanglement quantum system when they transmitted through the Pauli channels and the depolarizing channel both independently or collectively. Making use of the concurrence we found that the entanglement of a kind of mixed two-qubit system defined in this paper can be preserved in the collective Pauli σ y noise channel, but the entanglement of the other kind of mixed two-qubit system can be preserved in the collective Pauli σ z noise channel. Meanwhile, our quantum systems will undergoing the entanglement sudden death (ESD) in collective depolarizing channel when they return to the maximally entangled Bell states. The reason is the Landblad operators in depolarizing channel are non-commuting operators and this finding is in accord with the previous study.
    International Journal of Theoretical Physics 11/2014; 53(11).
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    ABSTRACT: In this paper, we introduce a partially defined binary operation on the set \(S^{+}(\mathcal {H})\) of all positive self-adjoint linear operators on a complex Hilbert space \(\mathcal {H}\) , which makes the set into a generalized effect algebra. Moreover, we present two kinds of partial orders on \(S^{+}(\mathcal {H})\) and give the relationship of the two orders. We study two important topologies on \(S^{+}(\mathcal {H})\) , too.
    International Journal of Theoretical Physics 11/2014; 53(11).
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    ABSTRACT: We propose a seven-ion entangled channel that can be used to realize the deterministic controlled teleportation of an arbitrary three-ion state in ion-trap systems. We describe the construction of this channel and explicitly demonstrate how the protocol works. In our scheme, it does not involve Bell-state measurement and only needs to perform the single-ion measurements and single ion unitary operations.
    International Journal of Theoretical Physics 11/2014; 53(11).
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    ABSTRACT: We proposes an efficient scheme for deterministic generation of entangled coherent states (ECSs) of effective bosonic modes realized by collective excitations of two separate atomic ensembles in coupled cavities. Our protocol is fast compare to the convectional dispersive interaction induced operation in a cavity-assisted system. In addition, the implemented evolution is independent on the cavity field states with the assistance of strong classical fields, and thus not sensitive to the thermal states of the cavities. Our analysis shows that the protocol is robust against the main decoherence sources and unavoidable parameter variations. Moreover, current experimental design provides us the potential of extending this deterministic scheme to multimode case.
    International Journal of Theoretical Physics 11/2014; 53(11).
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    ABSTRACT: A super Heisenberg equation associated with a 3 × 3 matrix spectral problem is proposed take advantage of the zero-curvature equation. Its super bi-Hamiltonian structures are obtained through super trace identity and infinitely many conserved quantities of the super Heisenberg equation are constructed by means of spectral parameter expansions.
    International Journal of Theoretical Physics 11/2014; 53(11).
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    ABSTRACT: The field equation of higher dimensions theory, have been applied in the area of cosmology. The resulting differential equations are solved for open and closed. We derive a relation between the Einstein constant G(t) and the cosmological constant Λ(t) from the conservation law T μ ν ;ν =0. We give a specific form of Λ(t) to solve the non-linear differential equations. Some cosmological parameters are calculated and some relevant cosmological problems are discussed.
    International Journal of Theoretical Physics 11/2014; 53(11).
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    ABSTRACT: We study the generalized second law of thermodynamics in the presence of non-interacting magnetic field and new modified Chaplygin gas with FRW universe. In this scenario, we investigate the validity of this law on Hubble, apparent, particle and event horizons. It is found that this law is respected on all horizons for specific values of the model parameters except on the event horizon where it does not hold for short time but remains valid otherwise. Finally, we explore the statefinders and Om diagnostic to check the viability of the present cosmological model.
    International Journal of Theoretical Physics 11/2014; 53(11).
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    ABSTRACT: In this paper, we consider effective Hamiltonian of 2D dilatonic black hole adding Axion field and calculate closed 2-form by using geometric prequantization method. It yields to the Schrödinger equation which may be solved to obtain wave function. We obtained a condition on the cosmological constant to obtain appropriate Hamilton equation of motions.
    International Journal of Theoretical Physics 11/2014; 53(11).
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    ABSTRACT: We propose a scheme to generate W states of multiple separated nitrogen-vacancy centers coupled resonantly to a whispering-gallery mode cavity. This scheme is faster and simpler than the previous proposals and is reachable by the near future cavity QED techniques. The practical feasibility of this method is also discussed. Our scheme provides a building block based on solid-state technology.
    International Journal of Theoretical Physics 11/2014; 53(11).
  • [Show abstract] [Hide abstract]
    ABSTRACT: This paper is concerned with adaptive observer design problem for a class of nonlinear stochastic systems. Unknown constant parameters are assumed to be norm bounded. In order to better use the structural knowledge of the nonlinear part, a generalized Lipschitz condition is introduced to the adaptive observer design for a class of nonlinear stochastic systems for the first time. Based on a Lyapunov-Krasovskii functional approach and stochastic Lyapunov stability theory, we present a new adaptive observer design condition with ultimately exponentially bounded in sense of mean square for errors systems in terms of linear matrix inequality (LMI). A numerical example is exploited to show the validity and feasibility of the results.
    International Journal of Theoretical Physics 11/2014; 53(11).
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    ABSTRACT: Combining the idea of ping-pong protocol with Controlled-NOT operation, we propose a secure quantum dialogue protocol based on single-photonss. Bob obtains the information of the encrypted quantum state by performing Controlled-NOT operation on the auxiliary particle and the encrypted single-photonss. Unlike the previous quantum dialogue protocols based on single-photonss, the proposed protocol not only overcomes information leakage but also possesses an acceptable efficiency.
    International Journal of Theoretical Physics 11/2014; 53(11).
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    ABSTRACT: Dirac oscillator subjects to an external magnetic field is re-examined. We show that this model can be mapped onto different quantum optics models if one insists to introduce two kinds of phonons which associate with the excitations of Dirac oscillator and magnetic field respectively. The conclusion about chirality quantum phase transition in the paper “Chirality quantum phase transition in the Dirac oscillator” (Bermudez et al. Phys. Rev. A, 77, 063815 2008) is only valid for a specific mapped quantum optics models rather than the Dirac oscillator itself. Thus, the conclusions about chirality quantum phase transitions in this paper are not universal.
    International Journal of Theoretical Physics 11/2014; 53(11).
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    ABSTRACT: I investigate the dependence of phase sensitivity on the initial input states. By adopting frozen-spin approximation, I first derive the analytical expresses of the angular momentum operators and then of quantum Fisher information, the phase sensitivity. It is shown that the initial input state with smaller value of angular momentum has the better degree of entanglement and phase sensitivity beats the Heisenberg limit.
    International Journal of Theoretical Physics 11/2014; 53(11).
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    ABSTRACT: Quantum nondemolition measurement scheme for entangled atomic ensembles was presented when they are restricted in two distant coupled cavities. Under certain conditions, we showed that the entanglement evolution of both the atomic ensembles and cavity fields are of the same periods, which provides us with potential nondemolitionmeasurement of entangled atomic ensembles by experimentally detecting cavity fields. Including the dissipation of the cavity fields, the same steps of evolution still hold. Furthermore, it is shown that we can have the two-mode squeezing steady-states of both the cavity fields and the atomic ensembles, which really provides us with the quantum nondemolition measurement of the entangled atomic state.
    International Journal of Theoretical Physics 11/2014; 53(11).
  • International Journal of Theoretical Physics 10/2014;
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    ABSTRACT: This paper improves on the result in my (Bacciagaluppi in Eur. J. Philos. Sci. 3: 87–100, 2013), showing that within the framework of the unitary Schrödinger equation it is impossible to reproduce the phenomenological description of quantum mechanical measurements (in particular the collapse of the state of the measured system) by assuming a suitable mixed initial state of the apparatus. The result follows directly from the no-signalling theorem applied to the entangled state of measured system and ancilla. As opposed to many other ‘insolubility theorems’ for the measurement problem of quantum mechanics, it focuses on the impossibility of reproducing the phenomenological collapse of the state of the measured system.
    International Journal of Theoretical Physics 10/2014; 53(10).