Month: September 2022

GRAVITY SINKS. “Black holes, though exotic, are, in a way, the simplest gravitational systems.” https://www.mdpi.com/1099-4300/21/11/1035/htm View in LinkedIn

FRAMING UP. “To examine the properties of black hole computers, we can start with a more general discussion of aspects of quantum gravity, the synthesis of quantum mechanics and general relativity.” https://www.mdpi.com/1099-4300/21/11/1035/htm View in LinkedIn

SPACE BUBBLES. “If space-time, like every thing else, undergoes quantum mechanical fluctuations, then space is composed of an ever-changing arrangement of bubbles which John Wheeler called spacetime foam, also known as quantum foam.” https://www.mdpi.com/1099-4300/21/11/1035/htm View in LinkedIn

PHENOMENAL PREMISE. “Quantum fluctuations of spacetime determine the precision with which the geometry of spacetime can be measured and they limit the power of computers in general, black hole computers in particular.” https://www.mdpi.com/1099-4300/21/11/1035/htm View in LinkedIn

TRANSMUTATION. “The first unquestionable proofs of the transformation of elements into different chemical elements have been provided by the study of the phenomena of radioactivity. There is no doubt that radium is transformed spontaneously into an active gas, radon, emitting at the same time alpha particles, or helions.” (By Frédéric Joliot-Curie on his Nobel Lecture, December 12, 1935). https://lnkd.in/eHfSCm_2 View in LinkedIn

FOAM AND DARK MATTER. “Applied to cosmology, spacetime foam physics leads to the prediction of a dark energy component in the current Universe (of the correct magnitude). Combined with ideas from gravitational thermodynamics and entropic gravity, we are led to a phenomenological model of dark matter in which a critical acceleration parameter, related to the (effective) cosmological constant, emerges.” https://www.mdpi.com/1099-4300/21/11/1035/htm View in LinkedIn

QUANTUM FLUCTUATIONS. “At small scales, spacetime is fuzzy and foamy due to quantum fluctuations. One manifestation of the fluctuations is in the induced uncertainties in any distance measurement. We will derive the uncertainties or fluctuations by two independent methods.” https://www.mdpi.com/1099-4300/21/11/1035/htm View in LinkedIn

PROBABILITY CURVES. “Since quantum fluctuations of spacetime manifest themselves in the form of uncertainties in the geometry of spacetime, the structure of spacetime foam can be inferred from the accuracy with which we can measure that geometry.” https://www.mdpi.com/1099-4300/21/11/1035/htm View in LinkedIn

GEDANKENEXPERIMENT. “One way to map out the geometry of this spacetime region is to fill the space with clocks, exchanging signals with other clocks and measuring the signals’ times of arrival. This process of mapping the geometry is a sort of computation.” https://www.mdpi.com/1099-4300/21/11/1035/htm View in LinkedIn

BLACK HOLE RAM. “We will show that the properties of black holes are inextricably intertwined with those of spacetime. For example, the strange scaling of space fluctuations with the cube root of distances provide a back-door way to derive the Bekenstein-Hawking formula for black hole memory.” https://www.mdpi.com/1099-4300/21/11/1035/htm View in LinkedIn