Geweld in de polder

Distinguishing de Sitter universe from thermal Minkowski spacetime by Casimir-Polder-like force

We demonstrate that the static ground state atom, which interacts with a conformally coupled massless scalar field in the de Sitter invariant vacuum, can obtain a position-dependent energy-level shift and this shift could cause a Casimir-Polder-like force on it. Interestingly no such force arises on the inertial atom bathed in a thermal radiation in the Minkowski universe. Thus, although the en...

Results of POLDER in-flight calibration

POLDER is a CNES instrument on board NASDA’s ADEOS polar orbiting satellite, which was successfully launched in August 1996. On October 30, 1996, POLDER entered its nominal acquisition phase and worked perfectly until ADEOS’s early end of service on June 30, 1997. POLDER is a multispectral imaging radiometer/polarimeter designed to collect global and repetitive observations of the solar radiati...

Results of POLDER in-flight absolute calibration

POLDER is a CNES instrument on-board ADEOS polar orbiting satellite, which was succesfully launched in august 1996. In november 1996, POLDER entered its nominal acquisition phase and functionned perfectly until ADEOS early end of service in june 1997. POLDER is a multispectral imaging radiometer/polarimeter designed to collect global and repetitive observations of the solar radiation reflected ...

Polder terminal By: Kasper Lendering

Lateral Casimir-Polder force with corrugated surfaces

We derive the lateral Casimir-Polder force on a ground state atom on top of a corrugated surface, up to first order in the corrugation amplitude. Our calculation is based on the scattering approach, which takes into account nonspecular reflections and polarization mixing for electromagnetic quantum fluctuations impinging on real materials. We compare our first order exact result with two common...