量子宇宙学(quantum cosmology)是将量子物理学应用于宇宙起源 研究的试探性理论。按照广义相对论,在时间的起始时刻必有一个奇点。但像所有经典物理理论一样,广义相对论在比普朗克时间(即10-43秒)更早的时刻是不适用的。那时量子现象将起重要作用。
本文对量子引力理论和量子宇宙学作了简单述评,讨论了两者之间的逻辑关系。
Quantum gravity theory and quantum cosmology are simply reviewed and their logical relations are discussed.
永久膨胀是由量子宇宙学模型得出的结论,在这个模型中,膨胀的气泡可以随意出现和消失。
Eternal inflation is a quantum cosmological model where inflationary bubbles can appear out of nothing.
霍金谈到20世纪20年代的德国,当时已经开发了量子力学的基础;然后又谈到20世纪60年代的英国剑桥,当时现代宇宙学的框架已经建立。
Hawking spoke of Germany in the 1920s, when the foundations of quantum mechanics were developed, and again of Cambridge, UK, in the 1960s, when the framework of modern cosmology was established.
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