The Experts below are selected from a list of 1272 Experts worldwide ranked by ideXlab platform
Mario G Silveirinha - One of the best experts on this subject based on the ideXlab platform.
-
spontaneous lateral atomic recoil force close to a photonic topological material
2018Co-Authors: Ali Hassani S Gangaraj, George W Hanson, Mauro Antezza, Mario G SilveirinhaAbstract:We investigate the quantum recoil force acting on an excited atom close to the surface of a nonreciprocal photonic topological insulator (PTI). The main atomic emission channel is the unidirectional surface plasmon propagating at the PTI-vacuum interface, and we show that it enables a spontaneous lateral recoil force that scales at short distances as 1/d^4, where d is the atom-PTI separation. Remarkably, the sign of the recoil force is polarization and orientation independent, and it occurs in a translation-invariant homogeneous system in thermal equilibrium. Surprisingly, the recoil force persists for very small values of the gyration Pseudovector, which, for a biased plasma, corresponds to very low cyclotron frequencies. The ultrastrong recoil force is rooted in the quasihyperbolic dispersion of the surface plasmons. We consider both an initially excited atom and a continuous pump scenario, the latter giving rise to a steady lateral force whose direction can be changed at will by simply varying the orientation of the biasing magnetic field. Our predictions may be tested in experiments with cold Rydberg atoms and superconducting qubits.
Masatoshi Yamamura - One of the best experts on this subject based on the ideXlab platform.
-
spin polarizations under a Pseudovector interaction between quarks with the kobayashi maskawa t hooft term in high density quark matter
2020Co-Authors: Masatoshi Morimoto, Yasuhiko Tsue, J Da Providencia, Constanca Providencia, Masatoshi YamamuraAbstract:A possibility of a quark spin polarization originating from a Pseudovector condensate is investigated in the three-flavor Nambu–Jona–Lasinio model with the Kobayashi–Maskawa–’t Hooft interaction wh...
-
spin polarizations under a Pseudovector interaction between quarks with the kobayashi maskawa t hooft term in high density quark matter
2019Co-Authors: Masatoshi Morimoto, Yasuhiko Tsue, J Da Providencia, Constanca Providencia, Masatoshi YamamuraAbstract:A possibility of a quark spin polarization originated from a Pseudovector condensate is investigated in the three-flavor Nambu-Jona-Lasinio model with the Kobayashi-Maskawa-'t Hooft interaction which leads to flavor mixing. It is shown that a Pseudovector condensate related to the strange quark easily occurs compared with Pseudovector condensate related to light quarks. Further, it is shown that the Pseudovector condensate related to the strange quark appears at a slightly small chemical potential by the effect of the flavor mixing due to the Kobayashi-Maskawa-'t Hooft interaction.
-
spontaneous magnetization under a Pseudovector interaction between quarks in high density quark matter
2018Co-Authors: Masatoshi Morimoto, Yasuhiko Tsue, J Da Providencia, Constanca Providencia, Masatoshi YamamuraAbstract:Spontaneous magnetization and magnetic susceptibility originated from the Pseudovector-type four-point interaction between quarks are calculated in quark matter with zero temperature and finite qua...
-
spontaneous magnetization under a Pseudovector interaction between quarks in high density quark matter
2018Co-Authors: Masatoshi Morimoto, Yasuhiko Tsue, J Da Providencia, Constanca Providencia, Masatoshi YamamuraAbstract:Spontaneous magnetization and magnetic susceptibility originated from the Pseudovector-type four-point interaction between quarks are calculated in quark matter with zero temperature and finite quark chemical potential by using the two-flavor Nambu-Jona-Lasinio model. It is shown that both the chiral condensate and spin polarized condensate coexist in a narrow region of the quark chemical potential. And then, it is also shown that, in this narrow region, the spontaneous magnetization appears. Also, the magnetic susceptibility due to quarks with the positive energy is evaluated in the spin polarized phase.
Arkady Vainshtein - One of the best experts on this subject based on the ideXlab platform.
-
hadronic light by light scattering in muonium hyperfine splitting
2008Co-Authors: Savely G Karshenboim, Valery A Shelyuto, Arkady VainshteinAbstract:We consider an impact of hadronic light-by-light scattering on the muonium hyperfine structure. A shift of the hyperfine interval {delta}{nu}(Mu){sub HLBL} is calculated with the light-by-light scattering approximated by the exchange of pseudoscalar and Pseudovector mesons. Constraints from the operator product expansion in QCD are used to fix parameters of the model similar to the one used earlier for the hadronic light-by-light scattering in calculations of the muon anomalous magnetic moment. The Pseudovector exchange is dominant in the resulting shift, {delta}{nu}(Mu){sub HLBL}=-0.0065(10) Hz. Although the effect is tiny it is useful in understanding the level of hadronic uncertainties.
Savely G Karshenboim - One of the best experts on this subject based on the ideXlab platform.
-
hyperfine structure interval of the 2s state of hydrogenlike atoms and a constraint on a Pseudovector boson with mass below 1 kev c2
2011Co-Authors: Savely G KarshenboimAbstract:A constraint on a spin-dependent interaction, induced by a Pseudovector light boson, is presented. The interaction includes a Yukawa-type contribution $\ensuremath{\alpha}{}^{\ensuremath{''}}({\mathbf{s}}_{1}\ifmmode\cdot\else\textperiodcentered\fi{}{\mathbf{s}}_{2}){e}^{\ensuremath{-}\ensuremath{\lambda}r}/r$ and a contact spin-spin term. To disentangle the long-range and contact terms we utilize experimental data on the $1s$ and $2s$ hyperfine intervals for light two-body atoms and construct a specific difference $8\ifmmode\times\else\texttimes\fi{}{E}_{\mathrm{hfs}}(2s)\ensuremath{-}{E}_{\mathrm{hfs}}(1s)$. That allows one to constrain the spin-dependent coupling constant $\ensuremath{\alpha}{}^{\ensuremath{''}}$ of an electron-nucleus Yukawa-type interaction in hydrogen, deuterium, and the helium-3 ion at the level below a part in ${10}^{16}$. The derived constraint is related to the range of masses below $4 \mathrm{keV}/{c}^{2}$. The combined constraint including the contact terms is also presented.
-
hadronic light by light scattering in muonium hyperfine splitting
2008Co-Authors: Savely G Karshenboim, Valery A Shelyuto, Arkady VainshteinAbstract:We consider an impact of hadronic light-by-light scattering on the muonium hyperfine structure. A shift of the hyperfine interval {delta}{nu}(Mu){sub HLBL} is calculated with the light-by-light scattering approximated by the exchange of pseudoscalar and Pseudovector mesons. Constraints from the operator product expansion in QCD are used to fix parameters of the model similar to the one used earlier for the hadronic light-by-light scattering in calculations of the muon anomalous magnetic moment. The Pseudovector exchange is dominant in the resulting shift, {delta}{nu}(Mu){sub HLBL}=-0.0065(10) Hz. Although the effect is tiny it is useful in understanding the level of hadronic uncertainties.
E M Khokha - One of the best experts on this subject based on the ideXlab platform.
-
heavy light mesons in the nonrelativistic quark model using laplace transformation method
2018Co-Authors: M Abushady, E M KhokhaAbstract:An analytic solution of the N-dimensional radial Schrodinger equation with the combination of vector and scalar potentials via the Laplace transformation method (LTM) is derived. The current potential is extended to encompass the spin hyperfine, spin-orbit, and tensor interactions. The energy eigenvalues and the corresponding eigenfunctions have been obtained in the N-dimensional space. The present results are employed to study the different properties of the heavy-light mesons (HLM). The masses of the scalar, vector, pseudoscalar, and Pseudovector for B, Bs, D, and Ds mesons have been calculated in the three-dimensional space. The effect of the dimensional number space is discussed on the masses of the HLM. We observed that the meson mass increases with increasing dimensional space. The decay constants of the pseudoscalar and vector mesons have been computed. In addition, the leptonic decay widths and branching ratio for the B+, D+, and mesons have been studied. Therefore, the used method with the current potential gives good results which are in good agreement with experimental data and are improved in comparison with recent theoretical studies.
-
heavy light mesons in the non relativistic quark model using laplace transformation method
2018Co-Authors: M Abushady, E M KhokhaAbstract:An analytic solution of the N-dimensional radial Schr\"odinger equation with the mixture of vector and scalar potentials via the Laplace transformation method (LTM) is studied. The present potential is extended to include the spin hyperfine, spin-orbit and tensor interactions. The energy eigenvalues and the corresponding eigenfunctions have been determined in the N-dimensional space. The present results are employed to study the different properties of the heavy-light mesons. The masses of the scalar, vector, pseudoscalar and Pseudovector of B, Bs, D and Ds mesons have been calculated in the three dimensional space. The effect of the dimensional number space is studied on the masses of the heavy-light mesons. We find that the meson mass increases with increasing dimensional space. The decay constants of the pseudoscalar and vector mesons have been computed. In addition, the leptonic decay widths and branching ratio for the B+, D+ and Ds+ mesons have been studied. Therefore, the present method with the present potential gives good results which are in good agreement with experimental data and are improved in comparison with recently theoretical works.
