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Há 5 dias · Physicists have struggled to understand the nature of time since the field began. But a new theoretical study suggests time could be an illusion woven at the quantum level.
Há 2 dias · The Nature of Space and Time (with Roger Penrose) (1996) The Large, the Small and the Human Mind (with Roger Penrose, Abner Shimony and Nancy Cartwright) (1997) The Future of Spacetime (with Kip Thorne, Igor Novikov, Timothy Ferris and introduction by Alan Lightman, Richard H. Price) (2002) A Briefer History of Time (with Leonard Mlodinow) (2005)
Há 4 dias · In physics, the special theory of relativity, or special relativity for short, is a scientific theory of the relationship between space and time. In Albert Einstein 's 1905 treatment, the theory is presented as being based on just two postulates: [p 1] [1] [2]
Há 1 dia · This approach consists of an ADM \(3+1\) decomposition , so that Hamiltonian and momentum constraints naturally emerge on three dimensional space-like hypersurfaces at constant times. Applying the standard rules of canonical quantization, the Hamiltonian constraint gives rise to the Wheeler–DeWitt equation [ 21 , 22 ] with a wave function depending on the metric variables of the three ...
Há 3 dias · The universe is all of space and time and their contents. It comprises all of existence, any fundamental interaction, physical process and physical constant, and therefore all forms of energy and matter, and the structures they form, from sub-atomic particles to entire galactic filaments.
Há 3 dias · What Is a Planet? New Proposal. How Galaxy 'Heart and Lungs' Extend Its Life. Mars Likely Had Cold and Icy Past. Increasing Militarization of Outer Space. The Origins of Dark Comets. Building...
Há 4 dias · A quantum theory of gravity implies a fine-grained structure of spacetime, which can be conveniently modeled as some form of ``pixelation'' at the Planck scale, with potentially observable consequences. In this work, we build upon previous results to investigate the effect of pixelation on the quantum vacuum, making use of the framework of doubly special relativity (DSR). At the center of the ...
