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Nonlocal de Broglie Wavelength of a Two-Photon System E. J. S. Fonseca3, Zoltan Paulinia, P. Nussenzveigb, C. H. Monkena, and S. Paduaa,c a Departamento de Fisica, Universidade Federal de Minas Gerais, Caixa Postal 702, Belo Horizonte, MG 30123-970, Brazil b Instituto de Fisica, Universidade de Säo Paulo, Caixa Postal 66318, Säo Paulo, SP 05315-970, Brazil c Dipartimento di Fisica, Universitä degli Studi di Roma “La Sapienza”, Roma, 00185, Italy Reprint requests to Prof. S. P.; E-mail: spadua@fisica.ufmg.br Z. Naturforsch. 56 a, 191-196 (2001); received

particle interference. The same idea can be used to test the local pilot wave interpretation, to test quantum nonlocality under new condi­ tions, and to devise an interferometer for a two-photon wave packet. This last result strongly suggests that there must be some connection between the deBroglie wavelength of an N-particle wave packet and entanglement. Key words: Interaction-free Measurement; Pilot-wave Interpretation; Quantum Nonlocality; de Broglie Wavelength of an /V-particle Wave Packet. 1. Introduction Measurements in which reduction of the state vector is

, 2013 The influence of the dynamic plasma shielding on the collisional entanglement fidelity is investi- gated in strongly coupled semiclassical plasmas. The partial wave analysis with the effective dynamic screening length is employed to obtain the dynamic entanglement fidelity as a function of collision energy, de Broglie wavelength, Debye length, and thermal energy. The results show that the col- lisional entanglement fidelity increases with increasing plasma temperature as well as de Broglie wavelength and, however, decreases with an increase of the Debye length

corrected Kelbg potential, taking into account the quantum effects, is applied to describe the electron-positron interaction potential in electron-positron plasmas. The Bom approximation is considered to obtain high-energy electron-positron scattering cross sections. The results show that the differential electron-positron scattering cross sections increase with increasing thermal de Broglie wavelength, i.e., decreasing plasma temperature. The differential electron-positron scattering cross sections decreases with increasing collision energy. It is also found that

plasmas since charge screening is important for determining the transport and collision properties as well as the physical characteristics of the plasma. It would also be expected that the truncated limit of the integral should contain all the information for the nonisothermal quantum screening effects in dense plasmas. Hence, in (9), the upper limit of the integration is given by λ ¯ e i ( = λ ¯ T ¯ 1 / 4 ) ${\bar \lambda _{ei}}( = \bar \lambda {\bar T^{1/4}})$ since the de Broglie wavelength is greater than the Debye length in these semiclassical plasmas. In

employed to obtain the bremsstrahlung radiation cross section as a function of the de Broglie wavelength, Debye length, impact parameter, radiation photon energy, projectile energy, and thermal energy. The result shows that the dynamic screening effect enhances the transi- tion bremsstrahlung radiation cross section. It is found that the maximum position of the transition bremsstrahlung process approaches to the center of the shielding cloud with increasing thermal en- ergy. It is also found that the dynamic screening effect on the bremsstrahlung radiation cross section

impact parameters equal to the de Broglie-wavelength 2 . In this range the classical description of the perturbing electrons is assumed to be still valid. In the dipole-only case the solution can be expressed exactly by elementary functions. The line profile clearly shows how important it is to consider the strong collisions. All the different ways of doing this lead to nearly the same results. 1. E in le itung Unabhängig voneinander haben BARANGER 1 und Griem und K o lb 2 eine Theorie entwickelt, um die Verbreiterung (und Verschiebung3) der Spektral­ linien

Zeitschrift für Physikalische Chemie, 214, 2, S. 1872205 (2000)  by Oldenbourg Wissenschaftsverlag, München Particle Entropies and Entropy Quanta. I. The Ideal Gas By H. W. Zimmermann Institut für Physikalische Chemie der Universität Freiburg, Albertstr. 21, D-79104 Freiburg, Germany (Received March 24, 1999; accepted April 21, 1999) Entropy quanta / Bose-Einstein and Boltzmann Distribution / Ideal Gas at Ordinary and Low Temperatures / Bose-Einstein Condensation / Thermal and Actual de Broglie Wavelength We consider an ideal gas of monatomic independent

–10 nm. From [ 9 ]. Reprinted with permission from AAAS. As the accelerating voltages of SEMs are mostly restricted to 30 kV, the STEM-investigation of thicker specimens is left to TEM devices. Here accelerating voltages of several hundred kilovolts are available. 2 Transmission electron microscopy: high-resolution morphology and microstructure TEM [ 20 , 21 , 22 ] gives the opportunity to investigate the specimen volume. Due to the higher accelerating voltages and hence smaller de-Broglie wavelengths of the electrons it offers even higher resolution and thus higher

functions of the collision energy, Debye length, electron de Broglie wavelength, polarisability, and atomic scattering length. Furthermore, the variations of the Ramsauer energy and the collision cross-section due to the quantum shielding effect are also discussed. 2 Theory and Calculations Recently, the Buckingham form of the screened polarisation interaction potential [ 3 ] between the electron and the neutral atom in partially ionised plasmas was obtained on the basis of the quantum defect theory including the influence of plasma screening corrections through the Debye