科学与环境

Three quantum-inspired cores leave opposite fingerprints on the ringing of black holes

来源: Phys.org - latest science and technology news stories · 发布于

Three quantum-inspired cores leave opposite fingerprints on the ringing of black holes
来源: Phys.org - latest science and technology news stories

Every black hole hides a question at its center. Einstein's theory predicts that whatever falls in is crushed into a singularity, a point of infinite density where the theory itself breaks down. Most physicists expect quantum gravity to replace that point with something finite. B

Every black hole hides a question at its center. Einstein's theory predicts that whatever falls in is crushed into a singularity, a point of infinite density where the theory itself breaks down. Most physicists expect quantum gravity to replace that point with something finite.

But the center lies hidden behind the horizon. How could we ever learn what is there?

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A quantum prediction from 1931 just came to life
科学与环境

A quantum prediction from 1931 just came to life

Nearly a century after physicist Hans Bethe predicted them, scientists have created and directly observed unusual quantum states known as “Bethe strings” in an ultracold gas. By cooling cesium atoms to near absolute zero and trapping them in thousands of tiny one-dimensional tube

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Earth’s center is moving, and NASA just measured it
科学与环境

Earth’s center is moving, and NASA just measured it

Earth’s center of mass is constantly on the move, shifting by a few millimeters as enormous amounts of water, ice, and even air migrate around the planet with the seasons. NASA scientists have developed a more precise way to track these tiny swings using laser-ranging satellites,

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