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Hace 3 días · Noether provided the resolution of this paradox, and a fundamental tool of modern theoretical physics, with Noether's first theorem, which she proved in 1915, but did not publish until 1918. She not only solved the problem for general relativity, but also determined the conserved quantities for every system of physical laws that possesses some continuous symmetry. [183]
Hace 5 días · 2007. John H. Schwarz is the Harold Brown Professor of Theoretical Physics Emeritus at the California Institute of Technology. He is a member of the National Academy of Sciences and a MacArthur Foundation Fellow (1987) and a winner of the Breakthrough Prize in Fundamental Physics (2014). Schwarz is regarded as one of the creators of string theory.
Hace 3 días · Resistivity and conductivity are intensive properties of materials, giving the opposition of a standard cube of material to current. Electrical resistance and conductance are corresponding extensive properties that give the opposition of a specific object to electric current.
Hace 4 días · Weak arrow of time: preference for a certain time direction of weak force in particle physics (see violation of CP symmetry); Cosmological arrow of time, which follows the accelerated expansion of the Universe after the Big Bang. The relationship(s) between these different Arrows of Time is a hotly debated topic in theoretical physics.
Hace 4 días · The physics controlling this very early period (including quantum gravity in the Planck epoch) is not understood, so we cannot say what, if anything, happened before time zero. Since the Planck epoch, the universe has been expanding to its present scale, with a very short but intense period of cosmic inflation speculated to have occurred within the first 10 −32 seconds. [40]
Hace 2 días · Physics News. Read interesting physics news and the latest physics research discoveries on SciTechDaily. Your premier source for the latest revelations, innovations, and research in the captivating world of physics includes recent breakthroughs from sources like Harvard, MIT, Los Alamos, Rice University, Princeton, and Lawrence Berkeley.
Hace 3 días · Quantum mechanics. Quantum entanglement is the phenomenon of a group of particles being generated, interacting, or sharing spatial proximity in such a way that the quantum state of each particle of the group cannot be described independently of the state of the others, including when the particles are separated by a large distance.
