论文标题
黑洞装饰量子叠加
Black Holes Decohere Quantum Superpositions
论文作者
论文摘要
我们表明，如果将一个巨大的身体放在空间分离状态的量子叠加中，那么在身体附近仅存在黑洞，最终将破坏叠加的连贯性。之所以发生这种情况，是因为实际上，身体的重力场将软重力辐射到黑洞中，从而使黑洞获得了有关叠加的“哪个路径”信息。对电动物体的量子叠加发生了类似的效果。我们提供了此类量子叠加的破坏时间的估计。我们认为，黑洞最终将破坏任何量子叠加的事实对于我们在重力理论中对黑洞本质的理解可能具有至关重要的意义。
We show that if a massive body is put in a quantum superposition of spatially separated states, the mere presence of a black hole in the vicinity of the body will eventually destroy the coherence of the superposition. This occurs because, in effect, the gravitational field of the body radiates soft gravitons into the black hole, allowing the black hole to acquire "which path" information about the superposition. A similar effect occurs for quantum superpositions of electrically charged bodies. We provide estimates of the decoherence time for such quantum superpositions. We believe that the fact that a black hole will eventually decohere any quantum superposition may be of fundamental significance for our understanding of the nature of black holes in a quantum theory of gravity.
