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E. C. Marino - One of the best experts on this subject based on the ideXlab platform.

  • Statistical transmutation of quantum bosonic strings coupled to general four-dimensional Chern-Simons theory
    Physical Review D, 2002
    Co-Authors: J. Barcelos-neto, E. C. Marino
    Abstract:

    A bosonic string coupled to the generalized Chern-Simons theory in 3+1D acquires a magnetic field along itself, when it is closed, and a topological charge at its extremity, when it is open. We construct the Creation Operators for the full quantum field states associated to these strings and determine the dual algebra satisfied by them. We show that the Creation Operator fo the composite state of a quantum closed bosonic string, bearing a magnetic flux, and a topologically charged open bosonic string, possesses generalized statistics. The relation of our results with previous approaches to the problem is also established.

  • Charge and Magnetic Flux Correlations in Chern-Simons Theory with Fermions
    Physical Review D, 1997
    Co-Authors: E. C. Marino
    Abstract:

    Charge and magnetic flux-bearing Operators are introduced in Chern-Simons theory both in its pure form and when it is coupled to fermions. The magnetic flux Creation Operator turns out to be the Wilson line. The Euclidean correlation functions of these Operators are shown to be local. They are evaluated exactly in pure Chern-Simons theory and through an inverse fermion mass expansion when the fermions are coupled. Physical states only occur in the presence of fermions and consist of composite charge-magnetic flux-carrying states which are in general anyonic. The large distance behavior of the correlation functions indicates the condensation of charge and magnetic flux. {copyright} {ital 1997} {ital The American Physical Society}

M. I. Polikarpov - One of the best experts on this subject based on the ideXlab platform.

  • Monopole Creation Operators as confinement–deconfinement order parameters
    Physics Letters B, 2003
    Co-Authors: V. A. Belavin, M. N. Chernodub, M. I. Polikarpov
    Abstract:

    Abstract We study numerically two versions of the monopole Creation Operators proposed by Frohlich and Marchetti. The disadvantage of the old version of the monopole Creation Operator is due to visibility of the Dirac string entering the definition of the Creation Operator in the theories with coexisting electric and magnetic charges. This problem does not exist for the new Creation Operator which is rather complicated. Using the Abelian Higgs model with a compact gauge field we show that both definitions of the monopole Creation Operator can serve as order parameters for the confinement–deconfinement phase transition. The value of the monopole condensate for the old version depends on the length of Dirac string. However, as soon as the length is fixed the old Operator certainly discriminates between the phases with condensed and noncondensed monopoles.

  • Monopole Creation Operator in the presence of matter
    Journal of Experimental and Theoretical Physics Letters, 2002
    Co-Authors: V. A. Belavin, M. N. Chernodub, M. I. Polikarpov
    Abstract:

    The monopole Creation Operator proposed recently by Fröhlich and Marchetti is investigated in the Abelian Higgs model with compact gauge field. We show numerically that the Creation Operator detects the condensation of monopoles in the presence of the dynamical matter field.

  • Confinement-Deconfinement Order Parameters
    Confinement Topology and Other Non-Perturbative Aspects of QCD, 2002
    Co-Authors: V. A. Belavin, M. N. Chernodub, M. I. Polikarpov
    Abstract:

    We study numerically the monopole Creation Operator proposed recently by Frohlich and Marchetti. The Operator is defined with the help of a three dimensional model which generates random Mandelstam strings. These strings imitate the Coulombic magnetic field around the monopole. We show that if the Mandelstam strings are condensed the Creation Operator discriminates between the phases with condensed and non-condensed monopoles in the Abelian Higgs model with the compact gauge field.

  • Numerical study of Frohlich and Marchetti monopole Creation Operator
    arXiv: High Energy Physics - Lattice, 2001
    Co-Authors: V. A. Belavin, M. N. Chernodub, M. I. Polikarpov
    Abstract:

    The monopole Creation Operator proposed recently by Frohlich and Marchetti is investigated in the Abelian Higgs model with compact gauge field. We show numerically that the Creation Operator detects the condensation of monopoles in the presence of the dynamical matter field.

M Bellini - One of the best experts on this subject based on the ideXlab platform.

  • single photon excitation of a coherent state catching the elementary step of stimulated light emission
    Physical Review A, 2005
    Co-Authors: Alessandro Zavatta, Silvia Viciani, M Bellini
    Abstract:

    When a single quantum of electromagnetic field excitation is added to the same spatiotemporal mode of a coherent state, a new field state is generated that exhibits intermediate properties between those of the two parents. Such a single-photon-added coherent state is obtained by the action of the photon Creation Operator on a coherent state and can thus be regarded as the result of the most elementary excitation process of a classical light field. Here we present and describe in depth the experimental realization of such states and their complete analysis by means of a novel ultrafast, time-domain, quantum homodyne tomography technique clearly revealing their nonclassical character.

  • catching the elementary step of excitation of a coherent light state by a single photon
    Proceedings of SPIE, 2005
    Co-Authors: M Bellini, Alessandro Zavatta, Silvia Viciani
    Abstract:

    A new class of non-classical light states has been experimentally generated and their complete phase-space characterization has been achieved by quantum homodyne tomography. Such states are produced by the action of the photon Creation Operator on a coherent light field and are thus the result of the elementary excitation process of a classical field by a single quantum. Being intermediate between a single-photon Fock state and a coherent one, they offer the unique opportunity to closely follow the smooth evolution between the particle-like and the wave-like behavior of the light field.

V. A. Belavin - One of the best experts on this subject based on the ideXlab platform.

  • On projection (in)dependence of the dual superconductor mechanism of confinement
    Journal of Experimental and Theoretical Physics Letters, 2004
    Co-Authors: V. A. Belavin, M. N. Chernodub, M. I. Polikarpov
    Abstract:

    We study the temperature dependence of the monopole condensate in different Abelian projections of the SU (2) gauge theory on the lattice. Using the Fröhlich-Marchetti monopole Creation Operator, we show numerically that the monopole condensate depends on the choice of the Abelian projection.

  • Monopole Creation Operators as confinement–deconfinement order parameters
    Physics Letters B, 2003
    Co-Authors: V. A. Belavin, M. N. Chernodub, M. I. Polikarpov
    Abstract:

    Abstract We study numerically two versions of the monopole Creation Operators proposed by Frohlich and Marchetti. The disadvantage of the old version of the monopole Creation Operator is due to visibility of the Dirac string entering the definition of the Creation Operator in the theories with coexisting electric and magnetic charges. This problem does not exist for the new Creation Operator which is rather complicated. Using the Abelian Higgs model with a compact gauge field we show that both definitions of the monopole Creation Operator can serve as order parameters for the confinement–deconfinement phase transition. The value of the monopole condensate for the old version depends on the length of Dirac string. However, as soon as the length is fixed the old Operator certainly discriminates between the phases with condensed and noncondensed monopoles.

  • Monopole Creation Operator in the presence of matter
    Journal of Experimental and Theoretical Physics Letters, 2002
    Co-Authors: V. A. Belavin, M. N. Chernodub, M. I. Polikarpov
    Abstract:

    The monopole Creation Operator proposed recently by Fröhlich and Marchetti is investigated in the Abelian Higgs model with compact gauge field. We show numerically that the Creation Operator detects the condensation of monopoles in the presence of the dynamical matter field.

  • Confinement-Deconfinement Order Parameters
    Confinement Topology and Other Non-Perturbative Aspects of QCD, 2002
    Co-Authors: V. A. Belavin, M. N. Chernodub, M. I. Polikarpov
    Abstract:

    We study numerically the monopole Creation Operator proposed recently by Frohlich and Marchetti. The Operator is defined with the help of a three dimensional model which generates random Mandelstam strings. These strings imitate the Coulombic magnetic field around the monopole. We show that if the Mandelstam strings are condensed the Creation Operator discriminates between the phases with condensed and non-condensed monopoles in the Abelian Higgs model with the compact gauge field.

  • Numerical study of Frohlich and Marchetti monopole Creation Operator
    arXiv: High Energy Physics - Lattice, 2001
    Co-Authors: V. A. Belavin, M. N. Chernodub, M. I. Polikarpov
    Abstract:

    The monopole Creation Operator proposed recently by Frohlich and Marchetti is investigated in the Abelian Higgs model with compact gauge field. We show numerically that the Creation Operator detects the condensation of monopoles in the presence of the dynamical matter field.

S. P. Strong - One of the best experts on this subject based on the ideXlab platform.

  • Creation Operator for spinons in one dimension
    Physical Review B, 1997
    Co-Authors: J. C. Talstra, S. P. Strong
    Abstract:

    We propose a definition for a Creation Operator for the spinon, the fractional statistics elementary excitation of the Haldane-Shastry model, and give numerical and analytical evidence that our Operator creates a single spinon with nearly unit amplitude in the Heisenberg model with inverse squared exchange. We then discuss how the Operator is useful in more general contexts such as studying the underlying spinons of other spin-chain models, like the XXX and XY model, and of the one-dimensional Hubbard model. {copyright} {ital 1997} {ital The American Physical Society}

  • A Creation Operator for Spinons in One Dimension
    arXiv: Strongly Correlated Electrons, 1997
    Co-Authors: S. P. Strong, J. C. Talstra
    Abstract:

    We propose a definition for a Creation Operator for the spinon, the fractional statistics elementary excitation of the Haldane-Shastry model, and give numerical and analytical evidence that our Operator creates a single spinon with nearly unit amplitude in the ISE model. We then discuss how the Operator is useful in more general contexts such as studying the underlying spinons of other spin chain models, like the XXX- and XY-model, and of the one dimensional Hubbard model.