"According to Einstein's General Relativity, for every black hole that exists within the Universe, there are only three properties that go into it that matter in any way: the black hole's total mass, the black hole's net electric charge, and the black hole's intrinsic angular momentum, and that's it. It doesn't matter what type of matter went into the black hole in order to form it; all that matters is its mass, charge, and angular momentum."
"If two particles are entangled, and one of them crosses a black hole's event horizon, does that break the entanglement? Or can we measure the particle that's outside the black hole and thereby glean information about its interior? This brings us to the intersection of two very important concepts at the frontiers of physics: black hole information and the nature of quantum entanglement."
"One of the most important rules you can count on is the second law of thermodynamics. As time goes on, entropy increases, and that means systems spontaneously tend towards equilibrium, less energy can be extracted from a system to perform work, and systems lose their memory of their initial conditions over time, becoming more like a thermal bath."
Black holes present a fundamental puzzle in physics. According to Einstein's General Relativity, only three properties define a black hole: mass, charge, and angular momentum, regardless of what matter formed it. However, the quantum universe introduces complications through phenomena like entanglement. When entangled particles exist with one crossing a black hole's event horizon, questions arise about whether entanglement breaks and whether information about the black hole's interior can be obtained by measuring the external particle. This intersects two critical physics frontiers: black hole information and quantum entanglement. The second law of thermodynamics governs everyday systems, causing entropy to increase and systems to lose memory of initial conditions over time.
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