نتایج جستجو برای: observers

تعداد نتایج: 20463  

Journal: :Monthly Notices of the Royal Astronomical Society 1889

Journal: :Physical Review A 2021

The Projection Postulate from Standard Quantum Mechanics relies fundamentally on measurements. But measurements implicitly suggest the existence of anthropocentric notions like measuring devices, which should rather emerge theory. This article proposes an alternative formulation Mechanics, in is replaced with a version and observations are not assumed as fundamental. More precisely, Wigner func...

Journal: :Linear Algebra and its Applications 2007

Journal: :Journal of Mathematical Physics 2008

Journal: :Psychonomic Bulletin & Review 2003

Journal: :Mathematical Problems in Engineering 2000

Journal: :European Physical Journal C 2021

Geodesic observers in cosmology are revisited. The coordinates based on freely falling introduced by Gautreau de Sitter and Einstein-de spaces (and, previously, Hoffmann Schwarzschild space) extended to general FLRW universes. We identify situations which the relation between geodesic comoving can be expressed explicitly terms of elementary functions. In general, turn out rather cumbersome limi...

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