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" ... The energy levels of a nanogram-scale disk of osmium, and how the effect of self-gravitation will ... [+] (right) or won't (left) affect the specific values of those energy levels. The disk's wavefunction, and how it's affected by gravitation, may lead to the first experimental test of whether gravity is truly a quantum force. ... "
" ... The energy levels of a nanogram-scale disk of osmium, and how the effect of self-gravitation will... [+] (right) or won't (left) affect the specific values of those energy levels. The disk's wavefunction, and how it's affected by gravitation, may lead to the first experimental test of whether gravity is truly a quantum force. ... "
" ... What's interesting is that these two approaches to gravity make fundamentally different predictions, even for weak gravitational fields. Either gravity is a classical background in which quantum objects interact, or both gravity and objects are quantized. This proposed experiment could determine which approach matches reality. Their idea is to take a charged disk of osmium with a mass of about a billionth of a gram and suspend it an electric field. This is small enough that its energy levels in the electric field would take on quantum behavior when cooled to temperatures a fraction of a Kelvin above absolute zero, but its also massive enough that its gravitational pull would affect the quantum behavior. ... "