Browsing Mathematics, Statistics & Physics by Publisher "American Physical Society"
Now showing items 1-12 of 12
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Asymptotic freedom, dimensional transmutation, and an infrared conformal fixed point for the ? -function potential in one-dimensional relativistic quantum mechanics
( American Physical Society , 2014 , Article)We consider the Schr?dinger equation for a relativistic point particle in an external one-dimensional ?-function potential. Using dimensional regularization, we investigate both bound and scattering states, and we obtain ... -
Correlated decay of triplet excitations in the shastry-sutherland compound SrCu2 (BO3)2
( American Physical Society , 2014 , Article)The temperature dependence of the gapped triplet excitations (triplons) in the 2D Shastry-Sutherland quantum magnet SrCu2(BO3)2 is studied by means of inelastic neutron scattering. The excitation amplitude rapidly decreases ... -
Dark solitons near potential and nonlinearity steps
( American Physical Society , 2016 , Article)We study dark solitons near potential and nonlinearity steps and combinations thereof, forming rectangular barriers. This setting is relevant to the contexts of atomic Bose-Einstein condensates (where such steps can be ... -
Dynamics of charge evolution in glass capillaries for 230-keV Xe23 + ions
( American Physical Society , 2012 , Article)We have measured the transmission of 230-keV (10-keV/q) Xe23+ ions through insulating tapered glass capillaries of microscopic dimensions. The dynamics of charging and discharging processes have been investigated, evidencing ... -
Electron-impact ionization of W5+
( American Physical Society , 2019 , Article)Electron-impact single-ionization cross sections for the W5+ ion have been studied experimentally and theoretically. Measurements of a detailed ionization spectrum and of absolute cross sections were performed employing ... -
Ion-impact-induced interatomic Coulombic decay in neon and argon dimers
( American Physical Society , 2013 , Article)We investigate the contribution of interatomic Coulombic decay induced by ion impact in neon and argon dimers (Ne2 and Ar2) to the production of low-energy electrons. Our experiments cover a broad range of perturbation ... -
K-shell photoionization of O+ and O2+ ions: Experiment and theory
( American Physical Society , 2015 , Article)Absolute cross sections for the single and double K-shell photoionization of carbon like O2+ and nitrogen like O+ ions were measured in the 526–620-eV photon energy range by employing the ion-photon merged-beam technique ... -
Majorana fermions in a box
( American Physical Society , 2017 , Article)Motivated by potential applications to ultracold matter, we perform a theoretical study of Majorana fermions confined to a finite volume, whose boundary conditions are characterized by self-adjoint extension parameters. ... -
Orientation dependence in multiple ionization of He 2 and Ne 2 induced by fast, highly charged ions: Probing the impact-parameter-dependent ionization probability in 11.37-MeV/u S 14 + collisions with He and Ne
( American Physical Society , 2014 , Article)We investigate orientation effects in the fragmentation of He2 and Ne2 induced by S14+ projectiles at an impact energy of 11.37 MeV/u. Multiple ionization shows a strong dependence on the orientation of the dimer axis with ... -
𝜆-point anomaly in view of the seven-loop hypergeometric resummation for the critical exponent 𝜈 of the 𝑂(2) 𝜙4 model
( American Physical Society , 2020 , Article)In this work, we use a specific parametrization of the hypergeometric approximants [the one by Mera et al. in Phys. Rev. Let. 115, 143001 (2015)] to approximate the seven-loop critical exponent 𝜈 for the 𝑂(2)-symmetric ... -
Universal large-order asymptotic behavior of the strong-coupling and high-temperature series expansions
( American Physical Society , 2022 , Article)For theories that exhibit second-order phase transition, we conjecture that the large-order asymptotic behavior of the strong-coupling (high-temperature) series expansion takes the form σnnb where b is a universal ... -
Vacuum structure and PT -symmetry breaking of the non-Hermetian (iϕ3) theory
( American Physical Society , 2017 , Article)In this work, we study the PT -symmetric (iϕ3) theory using the effective action formalism. To test the accuracy of the used technique, we apply it first to the PT -symmetric (−ϕ4) theory, where we reproduce the same results ...
