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7. Lee Da-Shin (李大興)
Department of Physics
National Dong Hwa University,
1 Da Hseuh
Rd, Sec 2, Shoufeng,
Hwalien 974
Taiwan
Email: dslee@phys.ndhu.edu.tw
Fax: +886-3-8633690
Title of talk: Influence on electron
coherence from quantum electromagnetic fields in the presence of conducting
plates
Abstract: The influence of electromagnetic
vacuum fluctuations in the presence of the perfectly conducting plate on
electrons is studied with an interference experiment. The evolution of the
reduced density matrix of the electron is derived by the method of influence
functional. We find that the plate boundary anisotropically
modifies vacuum fluctuations that in turn affect the electron coherence. The
path plane of the interference is chosen either parallel or normal to the plate.
In the vicinity of the plate, we show that the coherence between electrons due
to the boundary is enhanced in the parallel configuration, but reduced in the
normal case. The presence of the second parallel plate is found to boost these
effects. The potential relation between
the amplitude change and phase shift of interference fringes is pointed out.
The finite conductivity effect on electron coherence is discussed.
8. Lee, Wolung (李沃龍)
Department of Physics
Taiwan Normal University
88,Sec.4, Ting-Chou Rd,
Taipei, 116
Taiwan
Email: leewl@mail.sinica.edu.tw
Fax: +86 10 13522150873
Title of talk: Quantum noise and a low
cosmic microwave background quadrupole
Abstract: Considering the coupling of the inflaton to the quantum environment, we propose that cosmological
density perturbations may arise from inflationary fluctuations induced by the
colored quantum noise. A time scale for
the growth of
fluctuations naturally emerges in response to the driving force of
the noise, resulting in a suppression of large-scale density perturbation. This
may explain the observed low quadrupole in the WMAP
cosmic microwave background anisotropy data and potentially unveil the initial
time of inflation.
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