The Experts below are selected from a list of 237 Experts worldwide ranked by ideXlab platform
Mauro Antezza - One of the best experts on this subject based on the ideXlab platform.
-
casimir lifshitz force out of thermal equilibrium
Physical Review A, 2008Co-Authors: Mauro Antezza, Lev P. Pitaevskii, Sandro Stringari, Vitaly B. SvetovoyAbstract:We study the Casimir-Lifshitz interaction out of thermal equilibrium, when the interacting objects are at different temperatures. The analysis is focused on the Surface-Surface, Surface-rarefied body, and Surface-Atom configurations. A systematic investigation of the contributions to the force coming from the propagating and evanescent components of the electromagnetic radiation is performed. The large distance behaviors of such interactions is discussed, and both analytical and numerical results are compared with the equilibrium ones. A detailed analysis of the crossing between the Surface-Surface and the Surface-rarefied body, and finally the Surface-Atom force is shown, and a complete derivation and discussion of the recently predicted nonadditivity effects and asymptotic behaviors is presented.
-
Thermal effects of the Surface-Atom interaction : theory and recent experimental results with ultra-cold gases
2007Co-Authors: Mauro AntezzaAbstract:Thermal effects of the Surface-Atom interaction : theory and recent experimental results with ultra-cold gases
-
Casimir-Lifshitz Force Out of Thermal Equilibrium and Asymptotic Nonadditivity
Physical review letters, 2006Co-Authors: Mauro Antezza, Lev P. Pitaevskii, Sandro Stringari, Vitaly B. SvetovoyAbstract:We investigate the force acting between two parallel plates held at different temperatures. The force reproduces, as limiting cases, the well-known Casimir-Lifshitz Surface-Surface force at thermal equilibrium and the Surface-Atom force out of thermal equilibrium recently derived by M. Antezza et al., Phys. Rev. Lett. 95, 113202 (2005). The asymptotic behavior of the force at large distances is explicitly discussed. In particular when one of the two bodies is a rarefied gas the force is not additive, being proportional to the square root of the density. Nontrivial crossover regions at large distances are also identified.
-
Surface–Atom force out of thermal equilibrium and its effect on ultra-cold Atoms
Journal of Physics A: Mathematical and General (1975 - 2006), 2006Co-Authors: Mauro AntezzaAbstract:The Surface-Atom Casimir-Polder-Lifshitz force out of thermal equilibrium is investigated in the framework of macroscopic electrodynamics. Particular attention is devoted to its large distance limit that shows a new, stronger behaviour with respect to the equilibrium case. The frequency shift produced by the Surface-Atom force on the the center-of-mass oscillations of a harmonically trapped Bose-Einstein condensate and on the Bloch oscillations of an ultra-cold fermionic gas in an optical lattice are discussed for configurations out of thermal equilibrium.
-
Surface-Atom force out of thermal equilibrium and its effect on ultra-cold Atoms
Journal of Physics A: Mathematical and General, 2006Co-Authors: Mauro AntezzaAbstract:The Surface-Atom Casimir-Polder-Lifshitz force out of thermal equilibrium is investigated in the framework of macroscopic electrodynamics. Particular attention is devoted to its large distance limit that shows a new, stronger behaviour with respect to the equilibrium case. The frequency shift produced by the Surface-Atom force on the the center-of-mass oscillations of a harmonically trapped Bose-Einstein condensate and on the Bloch oscillations of an ultra-cold fermionic gas in an optical lattice are discussed for configurations out of thermal equilibrium.
Fumihiko Ohtani - One of the best experts on this subject based on the ideXlab platform.
-
topmost Surface analysis of srtio3 001 by coaxial impact collision ion scattering spectroscopy
Applied Physics Letters, 1994Co-Authors: Mamoru Yoshimoto, Tatsuro Maeda, Kazuki Shimozono, Osamu Ishiyama, Makoto Shinohara, Hideomi Koinuma, Fumihiko OhtaniAbstract:The terminating Atomic plane of SrTiO3 (001) Surface was investigated by means of coaxial impact‐collision ion scattering spectroscopy (CAICISS). CAICISS spectra proved that SrTiO3 (001) Surfaces of as‐supplied substrates as well as of O2‐annealed substrates were predominantly terminated with TiO2 Atomic plane, while the SrO Atomic plane came at the topmost Surface of SrTiO3 (001) homoepitaxial film. This indicates the structural conversion of the topmost Atomic layer from TiO2 to SrO occurred during the SrTiO3 homoepitaxial growth. The azimuth rotational CAICISS spectra exhibited a fourfold symmetry in the Surface Atom alignments, showing the square lattice structure of a terminating plane.
-
Topmost Surface analysis of SrTiO3 (001) by coaxial impact‐collision ion scattering spectroscopy
Applied Physics Letters, 1994Co-Authors: Mamoru Yoshimoto, Tatsuro Maeda, Kazuki Shimozono, Osamu Ishiyama, Makoto Shinohara, Hideomi Koinuma, Fumihiko OhtaniAbstract:The terminating Atomic plane of SrTiO3 (001) Surface was investigated by means of coaxial impact‐collision ion scattering spectroscopy (CAICISS). CAICISS spectra proved that SrTiO3 (001) Surfaces of as‐supplied substrates as well as of O2‐annealed substrates were predominantly terminated with TiO2 Atomic plane, while the SrO Atomic plane came at the topmost Surface of SrTiO3 (001) homoepitaxial film. This indicates the structural conversion of the topmost Atomic layer from TiO2 to SrO occurred during the SrTiO3 homoepitaxial growth. The azimuth rotational CAICISS spectra exhibited a fourfold symmetry in the Surface Atom alignments, showing the square lattice structure of a terminating plane.
Mamoru Yoshimoto - One of the best experts on this subject based on the ideXlab platform.
-
in situ determination of the terminating layer of la0 7sr0 3mno3 thin films using coaxial impact collision ion scattering spectroscopy
Applied Physics Letters, 1998Co-Authors: Mamoru Yoshimoto, Hidenori Maruta, T Ohnishi, Kenji Sasaki, Hideomi KoinumaAbstract:In situ analysis of the terminating Atomic plane of c-axis oriented La0.7Sr0.3MnO3 thin films grown epitaxially on SrTiO3(100) substrate by laser molecular beam epitaxy has been carried out employing coaxial impact-collision ion scattering spectroscopy (CAICISS). The CAICISS time-of-flight spectroscopic studies reveal that the (001) Surface of c-axis oriented La0.7Sr0.3MnO3 thin films is predominantly terminated with MnO2 plane. The azimuth rotational CAICISS measurements show a fourfold symmetry in the Surface Atom alignments establishing the square lattice structure of the terminating plane.
-
topmost Surface analysis of srtio3 001 by coaxial impact collision ion scattering spectroscopy
Applied Physics Letters, 1994Co-Authors: Mamoru Yoshimoto, Tatsuro Maeda, Kazuki Shimozono, Osamu Ishiyama, Makoto Shinohara, Hideomi Koinuma, Fumihiko OhtaniAbstract:The terminating Atomic plane of SrTiO3 (001) Surface was investigated by means of coaxial impact‐collision ion scattering spectroscopy (CAICISS). CAICISS spectra proved that SrTiO3 (001) Surfaces of as‐supplied substrates as well as of O2‐annealed substrates were predominantly terminated with TiO2 Atomic plane, while the SrO Atomic plane came at the topmost Surface of SrTiO3 (001) homoepitaxial film. This indicates the structural conversion of the topmost Atomic layer from TiO2 to SrO occurred during the SrTiO3 homoepitaxial growth. The azimuth rotational CAICISS spectra exhibited a fourfold symmetry in the Surface Atom alignments, showing the square lattice structure of a terminating plane.
-
Topmost Surface analysis of SrTiO3 (001) by coaxial impact‐collision ion scattering spectroscopy
Applied Physics Letters, 1994Co-Authors: Mamoru Yoshimoto, Tatsuro Maeda, Kazuki Shimozono, Osamu Ishiyama, Makoto Shinohara, Hideomi Koinuma, Fumihiko OhtaniAbstract:The terminating Atomic plane of SrTiO3 (001) Surface was investigated by means of coaxial impact‐collision ion scattering spectroscopy (CAICISS). CAICISS spectra proved that SrTiO3 (001) Surfaces of as‐supplied substrates as well as of O2‐annealed substrates were predominantly terminated with TiO2 Atomic plane, while the SrO Atomic plane came at the topmost Surface of SrTiO3 (001) homoepitaxial film. This indicates the structural conversion of the topmost Atomic layer from TiO2 to SrO occurred during the SrTiO3 homoepitaxial growth. The azimuth rotational CAICISS spectra exhibited a fourfold symmetry in the Surface Atom alignments, showing the square lattice structure of a terminating plane.
Sandro Stringari - One of the best experts on this subject based on the ideXlab platform.
-
casimir lifshitz force out of thermal equilibrium
Physical Review A, 2008Co-Authors: Mauro Antezza, Lev P. Pitaevskii, Sandro Stringari, Vitaly B. SvetovoyAbstract:We study the Casimir-Lifshitz interaction out of thermal equilibrium, when the interacting objects are at different temperatures. The analysis is focused on the Surface-Surface, Surface-rarefied body, and Surface-Atom configurations. A systematic investigation of the contributions to the force coming from the propagating and evanescent components of the electromagnetic radiation is performed. The large distance behaviors of such interactions is discussed, and both analytical and numerical results are compared with the equilibrium ones. A detailed analysis of the crossing between the Surface-Surface and the Surface-rarefied body, and finally the Surface-Atom force is shown, and a complete derivation and discussion of the recently predicted nonadditivity effects and asymptotic behaviors is presented.
-
Casimir-Lifshitz Force Out of Thermal Equilibrium and Asymptotic Nonadditivity
Physical review letters, 2006Co-Authors: Mauro Antezza, Lev P. Pitaevskii, Sandro Stringari, Vitaly B. SvetovoyAbstract:We investigate the force acting between two parallel plates held at different temperatures. The force reproduces, as limiting cases, the well-known Casimir-Lifshitz Surface-Surface force at thermal equilibrium and the Surface-Atom force out of thermal equilibrium recently derived by M. Antezza et al., Phys. Rev. Lett. 95, 113202 (2005). The asymptotic behavior of the force at large distances is explicitly discussed. In particular when one of the two bodies is a rarefied gas the force is not additive, being proportional to the square root of the density. Nontrivial crossover regions at large distances are also identified.
-
New Asymptotic Behavior of the Surface-Atom Force out of Thermal Equilibrium
Physical Review Letters, 2005Co-Authors: Mauro Antezza, Lev P. Pitaevskii, Sandro StringariAbstract:The Casimir-Polder-Lifshitz force felt by an Atom near the Surface of a substrate is calculated out of thermal equilibrium in terms of the dielectric function of the material and of the Atomic polarizability. The new force decays like 1=z 3 at large distances (i.e., slower than at equilibrium), exhibits a sizable temperature dependence, and is attractive or repulsive depending on whether the temperature of the substrate is higher or smaller than the one of the environment. Our predictions can be relevant for experiments with ultracold Atomic gases. Both dielectric and metal substrates are considered.
Hideomi Koinuma - One of the best experts on this subject based on the ideXlab platform.
-
in situ determination of the terminating layer of la0 7sr0 3mno3 thin films using coaxial impact collision ion scattering spectroscopy
Applied Physics Letters, 1998Co-Authors: Mamoru Yoshimoto, Hidenori Maruta, T Ohnishi, Kenji Sasaki, Hideomi KoinumaAbstract:In situ analysis of the terminating Atomic plane of c-axis oriented La0.7Sr0.3MnO3 thin films grown epitaxially on SrTiO3(100) substrate by laser molecular beam epitaxy has been carried out employing coaxial impact-collision ion scattering spectroscopy (CAICISS). The CAICISS time-of-flight spectroscopic studies reveal that the (001) Surface of c-axis oriented La0.7Sr0.3MnO3 thin films is predominantly terminated with MnO2 plane. The azimuth rotational CAICISS measurements show a fourfold symmetry in the Surface Atom alignments establishing the square lattice structure of the terminating plane.
-
topmost Surface analysis of srtio3 001 by coaxial impact collision ion scattering spectroscopy
Applied Physics Letters, 1994Co-Authors: Mamoru Yoshimoto, Tatsuro Maeda, Kazuki Shimozono, Osamu Ishiyama, Makoto Shinohara, Hideomi Koinuma, Fumihiko OhtaniAbstract:The terminating Atomic plane of SrTiO3 (001) Surface was investigated by means of coaxial impact‐collision ion scattering spectroscopy (CAICISS). CAICISS spectra proved that SrTiO3 (001) Surfaces of as‐supplied substrates as well as of O2‐annealed substrates were predominantly terminated with TiO2 Atomic plane, while the SrO Atomic plane came at the topmost Surface of SrTiO3 (001) homoepitaxial film. This indicates the structural conversion of the topmost Atomic layer from TiO2 to SrO occurred during the SrTiO3 homoepitaxial growth. The azimuth rotational CAICISS spectra exhibited a fourfold symmetry in the Surface Atom alignments, showing the square lattice structure of a terminating plane.
-
Topmost Surface analysis of SrTiO3 (001) by coaxial impact‐collision ion scattering spectroscopy
Applied Physics Letters, 1994Co-Authors: Mamoru Yoshimoto, Tatsuro Maeda, Kazuki Shimozono, Osamu Ishiyama, Makoto Shinohara, Hideomi Koinuma, Fumihiko OhtaniAbstract:The terminating Atomic plane of SrTiO3 (001) Surface was investigated by means of coaxial impact‐collision ion scattering spectroscopy (CAICISS). CAICISS spectra proved that SrTiO3 (001) Surfaces of as‐supplied substrates as well as of O2‐annealed substrates were predominantly terminated with TiO2 Atomic plane, while the SrO Atomic plane came at the topmost Surface of SrTiO3 (001) homoepitaxial film. This indicates the structural conversion of the topmost Atomic layer from TiO2 to SrO occurred during the SrTiO3 homoepitaxial growth. The azimuth rotational CAICISS spectra exhibited a fourfold symmetry in the Surface Atom alignments, showing the square lattice structure of a terminating plane.