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131,775 research outcomes, page 1 of 13,178
  • publication . Article . 1994
    Closed Access
    Authors:
    Jaroszynski, D. A.; Prazeres, R.; Glotin, F.; Ortega, J. M.;
    Persistent Identifiers
    Publisher: American Physical Society (APS)

    We present the first observation of two-color free-electron laser (FEL) operation using a single electron beam, single optical cavity, and a stepped undulator. The undulator is divided into two sections, each having different deflection parameters, ${\mathit{K}}_{1}$ an...

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  • publication . Article . Preprint . 2011
    Open Access English
    Authors:
    Olga Kruglova; Fabian Brau; D. Villers; Pascal Damman;
    Persistent Identifiers
    Country: Belgium

    Flaps can be detached from a thin film glued on a solid substrate by tearing and peeling. For flat substrates, it has been shown that these flaps spontaneously narrow and collapse in pointy triangular shapes. Here we show that various shapes, triangular, elliptic, acumi...

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  • publication . Article . 2007
    Open Access
    Authors:
    Francesco Marino; Francesco Marin; Salvador Balle; Oreste Piro;
    Persistent Identifiers
    Publisher: American Physical Society (APS)

    We introduce a new class of excitable systems with two-dimensional fast dynamics that includes inertia. A novel transition from excitability to relaxation oscillations is discovered where the usual Hopf bifurcation is followed by a cascade of period doubled and chaotic ...

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  • publication . Article . 1997
    Closed Access
    Authors:
    D. Yesilleten; A. N. Berker;
    Persistent Identifiers
    Publisher: American Physical Society (APS)

    We show that extensive statistical mechanics information can be obtained by the calculation of local densities such as local magnetizations and neighbor correlations, made possible by renormalization-group theory. This is illustrated with quenched random-bond, random-fi...

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  • publication . Article . Preprint . 2015
    Open Access English
    Authors:
    Proesmans, Karel; Van den Broeck, Christian;
    Persistent Identifiers
    Country: Belgium

    We evaluate the Onsager matrix for a system under time-periodic driving by considering all its Fourier components. By application of the second law, we prove that all the fluxes converge to zero in the limit of zero dissipation. Reversible efficiency can never be reache...

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  • publication . Article . 1992
    Closed Access
    Authors:
    J. C. Zink; J. Reif; Eckart Matthias;
    Persistent Identifiers
    Publisher: American Physical Society (APS)

    Water adsorption on polished (111) surfaces of ${\mathrm{BaF}}_{2}$ and ${\mathrm{CaF}}_{2}$ was studied at room temperature under ultrahigh vacuum conditions by optical second-harmonic generation. Above ${10}^{4}$ langmuirs, the total second-harmonic yield decreases wi...

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  • publication . Preprint . Article . 2008
    Open Access English
    Authors:
    Pérez García, David; Wolf, M.M.; Sanz, M.; Verstraete, F.; Cirac, J.I.;
    Persistent Identifiers
    Countries: Spain, Belgium

    We show that the existence of string order in a given quantum state is intimately related to the presence of a local symmetry by proving that both concepts are equivalent within the framework of finitely correlated states. Once this connection is established, we provide...

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  • publication . Preprint . Article . 2021
    Open Access English
    Authors:
    Paul Fisher; Robert Cernansky; Ben Haylock; Mirko Lobino;
    Persistent Identifiers
    Project: ARC | ARC Future Fellowships - ... (FT180100055)

    High-speed long-range quantum communication requires combining frequency multiplexed photonic channels with quantum memories. We experimentally demonstrate an integrated quantum frequency conversion protocol that can convert between wavelength division multiplexing chan...

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  • publication . Preprint . Article . Other literature type . 2001
    Open Access English
    Authors:
    Gang Su; M. K. Suzuki;

    On the basis of gauge invariance, it is proven in an elementary and straightforward manner, but without invoking any {\it ad hoc} assumption, that the existence of off-diagonal long-range order in one-particle reduced density matrix in Bose liquids implies both the irro...

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  • publication . Article . Preprint . 2003
    Open Access
    Authors:
    Neto, A. H. Castro; Novais, E.; Borda, L.; Zarand, Gergely; Affleck, I.;
    Persistent Identifiers
    Publisher: American Physical Society (APS)
    Project: NSF | Topics in Quantum Magneti... (0203159), NSF | U.S.-Hungary Materials Th... (0130446)

    We discuss the problem of a spin 1/2 impurity immersed in a spin S magnetically ordered background. We show that the problem maps onto a generalization of the dissipative two level system (DTLS) with two independent heat baths, associated with the Goldstone modes of the...

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131,775 research outcomes, page 1 of 13,178