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AS OLD AS THE UNIVERSE. “For a GUT monopole, Mmon ∼ 1017Gev, we find that for Q > 106 the lifetime is larger than the age of the universe. We get a similar answer if we assume that the unit charge magnetic black hole has a mass near the weak gravity upper bound. Of course, if the unit charge monopoles are lighter, then one would need to make the charge larger, and the black holes bigger, to ensure long lifetimes.” (Don’t worry about the symbols, get the gist). https://lnkd.in/dX6Fbwx View in LinkedIn

MAGNETIC BLACK HOLES. “These objects are metastable. The magnetic field can decay be creating pairs of magnetic monopoles. Even if magnetic monopoles do not exist, they could decay by emitting smaller magnetically charged black holes. This decay rate can be easily computed in the near horizon region by approximating the monopoles as point particles.” https://lnkd.in/dX6Fbwx View in LinkedIn

MAGNETS. “In fact, the physics of these black holes has many properties in common with magnetic monopoles.” https://lnkd.in/dX6Fbwx View in LinkedIn

BOSONS. “If you jump onto and then down from a carousel, you can steal energy from the carousel. These bosons do the same thing to a black hole.” https://lnkd.in/dRWpnua View in LinkedIn

Two massive blocks of polyurethane waiting to find form. Beyond exciting! View in LinkedIn

THE MIGHTY AND THE TINY. “But the physicists have found that two previously detected black holes are spinning too fast to have been affected by any ultralight bosons. Because of their large spins, the black holes’ existence rules out the existence of ultralight bosons with masses between 1.3×10(-13) electronvolts and 2.7×10(-13) electronvolts — around a quintillionth the mass of an electron.” https://lnkd.in/dRWpnua View in LinkedIn

NEWTON’S ABSOLUTE TIME AND SPACE. “Newton would have been surprised at the modern quantum theory and at the dissolution of quanta into vibrations; Plato would have expected it. Physicists are now explaining these chemical facts by means of conceptions which Plato would have welcomed.” https://lnkd.in/g4ntepe View in LinkedIn

THE FINE PRINT IN WONDERLAND. “This simple idea is made more complicated by a few factors. First, one must take into account that some black holes may be slowly spinning when they form. The small spin measurements inferred from the BBH mergers observed by LIGO/Virgo could be due to either the superradiant growth of the boson cloud or an astrophysical distribution favoring small spins at the formation.” (BBH = binary black holes). https://lnkd.in/gnQbwGA View in LinkedIn

QED. “Conversely, the discovery of highly spinning black holes could rule out the existence of boson in an appropriate mass range.” https://lnkd.in/gnQbwGA View in LinkedIn

ALICE’S WONDERFUL LOGIC. “Supermassive black holes, such as M87, can be used to probe much lighter bosons, with μs ∼ 10(−21) eV. Roughly speaking, if a dearth of highly spinning black holes is observed for some range of black hole masses, that could be suggestive of the existence of ultralight bosons which have spun down the black holes.” https://lnkd.in/gnQbwGA View in LinkedIn