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Amer Physical Soc |
Documentos disponibles de esta editorial (185)
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Peropadre, B. ; Zueco, D. ; Porras Torres, Diego ; Garc?´a-Ripoll, J. J. | Amer Physical Soc | 2013-12-09The time and space resolved dynamics of a qubit with an Ohmic coupling to propagating 1D photons is studied, from weak coupling to the ultrastrong coupling regime. A nonperturbative study based on matrix product states shows the following result[...]![]()
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Gómez Nicola, Ángel ; Peláez Sagredo, José Ramón ; Ruiz de Elvira, Jacobo | Amer Physical Soc | 2010-10-14Four-quark correlators and the factorization hypothesis are analyzed in the meson sector within chiral perturbation theory. We define the four-quark condensate as lim(x -> 0) , which is equivalent to ot[...]![]()
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We compute the spectrum, mixing and interaction structure of scalar models with a general coupling to the scalar curvature. As it is well known the perturbative states of these theories are given by two massive spin-0 modes in addition to one ma[...]![]()
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Misner space is generalized to have the nonorientable topology of a Klein bottle, and it is shown that, in a classical spacetime with multiply connected space slices having such a topology, closed timelike curves are formed. Different regions on[...]![]()
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We propose a new mechanism for the formation of dark matter clumps in the radiation era. We assume that a light scalar field is decoupled from matter and oscillates harmonically around its vacuum expectation value. We include self-interactions a[...]![]()
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We study static, spherically symmetric black holes supported by the Euler-Heisenberg theory of electrodynamics and coupled to two different modified theories of gravity. Such theories are the quadratic f (R) model and Eddington-inspired Born-Inf[...]![]()
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The symmetries of unimodular gravity are clarified somewhat.![]()
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Teo, Yong Siah ; Struchalin, G. I. ; Kovlakov, E. V. ; Ahn, Daekun ; Jeong, Hyunseok ; Straupe, S. S. ; Kulik, S. P. ; Leuchs, Gerd ; Sánchez Soto, Luis Lorenzo | Amer Physical Soc | 2020-02-01We present a compressive quantum process tomography scheme that fully characterizes any rank-deficient completely positive process with no spurious a priori information. It uses randomly chosen input states and adaptive output von Neumann measur[...]![]()
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A previous work about inclusive proton decay in a nucleus is critically analyzed. Explicit new calculations are carried out in the deuteron, which turn out to be consistent with previous evaluations by other authors. By relating the inclusive de[...]![]()
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Pachón, Leonardo A. ; Relaño Pérez, Armando ; Peropadre, Borja ; Aspuru-Guzik, Alán | Amer Physical Soc | 2018-10-19Based on the connection between the spectral form factor and the probability to return, the origin of the energy level fluctuation 1/f(alpha) noise in fully chaotic and fully integrable systems is traced to the quantum interference between invar[...]![]()
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It is well known that an extremely accurate parametrization of the growth function of matter density perturbations in ACDM cosmology, with errors below 0.25%, is given by f(a) = ?^(?)_(m)(a) with ? ? 0.55. In this work, we show that a simple mo[...]![]()
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Garay Elizondo, Luis Javier ; Halliwel, Jonathan J. ; Mena Marugán, Guillermo A. | Amer Physical Soc | 1991-04-15We study a class of minisuperspace models consisting of a homogenous isotropic universe with a minimally coupled homogenous scalar field with a potential alpha cosh(2-phi) + beta sinh(2-phi), where alpha and beta are arbitrary parameters. This i[...]![]()
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We present and analyze a new set of Ward Identities which shed light on the distinction between different patterns of chiral symmetry restoration in QCD, namely O(4) vs O(4) x U(1)_A. The degeneracy of chiral partners for all scalar and pseudosc[...]![]()
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%'e compute the divergent part of the three-point vertex function of the non-Abelian Yang-Mills gauge field theory within the stochastic quantization approach to the one-loop order. This calculation allows us to find four renormalization constan[...]![]()
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Alonso, J.L. ; Boucaud, Ph. ; Martín Mayor, Víctor ; van der Sijs, A.J. | Amer Physical Soc | 2000-02-01The phase diagram at zero temperature of a lattice SU(2) scalar-fermion model in 211 dimensions is studied numerically and with mean-field methods. Special attention is devoted to the strong coupling regime. We have developed a new method to ada[...]![]()
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Blázquez Salcedo, José Luis ; González Romero, Luis Manuel ; Navarro Lérida, Francisco | Amer Physical Soc | 2013-05-31Here we investigate the axial w quasinormal modes of neutron stars for 18 realistic equations of state, most of them satisfying the 2M condition. In particular, we study the influence of the presence of hyperons and quarks in the core of the ne[...]![]()
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Ruiz Cembranos, José Alberto ; Cruz Dombriz, Álvaro de la ; Dobado González, Antonio ; Lineros, R.A. ; López Maroto, Antonio | Amer Physical Soc | 2011-04-11If the present dark matter in the Universe annihilates into standard model particles, it must contribute to the fluxes of cosmic rays that are detected on the Earth and, in particular, to the observed gamma-ray fluxes. The magnitude of such a co[...]![]()
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In this work we provide simple and precise parametrizations of the existing ?K scattering data from threshold up to 1.6 GeV, which are constrained to satisfy forward dispersion relations as well as three additional threshold sum rules. We also p[...]![]()
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We improve, in the energy region between the K?K threshold and ~ 1.4 GeV, the energy-dependent phase shift analysis of ? ? scattering presented in a previous paper. For the S0 wave, we have included more data above the K?K threshold and we hav[...]![]()
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We complete and improve the fits to experimental ? ? scattering amplitudes, both at low and high energies, that we performed in the previous papers of this series. We then verify that the corresponding amplitudes satisfy analyticity requirements[...]![]()
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Garcia-Martin, R. ; Kami?ski, Robert ; Peláez Sagredo, José Ramón ; Ruiz de Elvira, Jacobo ; Yndurain, F.J. | Amer Physical Soc | 2011-04-04We improve our description of ? ? scattering data by imposing additional requirements on our previous fits, in the form of once-subtracted Roy-like equations, while extending our analysis up to 1100 MeV. We provide simple and ready to use parame[...]![]()
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Using unitarized chiral perturbation theory methods, we perform a detailed analysis of the ? ? scattering poles f_0(600) and ?(770) behavior when medium effects such as temperature or density drive the system towards chiral symmetry restoration.[...]![]()
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Blázquez Salcedo, José Luis ; González Romero, Luis Manuel ; Navarro Lérida, F. | Amer Physical Soc | 2014-02-06In this paper, we analyze the quasinormal mode spectrum of realistic neutron stars by studying the polar modes. In particular, we calculate the fundamental mode (f mode), the fundamental pressure mode (p mode), and the fundamental curvature mode[...]![]()
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We calculate the combination 2a?_(0)-5a?(^2) (the Olsson sum rule) and the scattering lengths and effective ranges a?,a?^(2) and b?,b?^(I) dispersively (with the Froissart-Gribov representation) using, at low energy, the phase shifts for ? ? sca[...]![]()
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Arqueros Martínez, Fernando ; Blanco Ramos, Francisco ; García Pinto, Diego ; Minaya Flores, Ignacio Andrés ; Ortiz Ramis, Montserrat ; Rosado Vélez, Jaime ; Vázquez Peñas, José Ramón | Amer Physical Soc | 2014-03-14The emission of radio waves from air showers has been attributed to the so-called geomagnetic emission process. At frequencies around 50 MHz this process leads to coherent radiation which can be observed with rather simple setups. The direction [...]