Herrera Luis
Instituto Universitario de Física Fundamental y Matematicas, Universidad de Salamanca, 37007 Salamanca, Spain.
Entropy (Basel). 2020 Mar 16;22(3):340. doi: 10.3390/e22030340.
We endeavour to illustrate the physical relevance of the Landauer principle applying it to different important issues concerning the theory of gravitation. We shall first analyze, in the context of general relativity, the consequences derived from the fact, implied by Landauer principle, that information has mass. Next, we shall analyze the role played by the Landauer principle in order to understand why different congruences of observers provide very different physical descriptions of the same space-time. Finally, we shall apply the Landauer principle to the problem of gravitational radiation. We shall see that the fact that gravitational radiation is an irreversible process entailing dissipation, is a straightforward consequence of the Landauer principle and of the fact that gravitational radiation conveys information. An expression measuring the part of radiated energy that corresponds to the radiated information and an expression defining the total number of bits erased in that process, shall be obtained, as well as an explicit expression linking the latter to the Bondi news function.
我们致力于通过将朗道尔原理应用于与引力理论相关的不同重要问题，来说明其物理相关性。我们首先将在广义相对论的背景下，分析由朗道尔原理所暗示的信息具有质量这一事实所产生的后果。接下来，我们将分析朗道尔原理所起的作用，以便理解为什么不同的观察者共动坐标系对同一时空会给出截然不同的物理描述。最后，我们将把朗道尔原理应用于引力辐射问题。我们将会看到，引力辐射是一个涉及耗散的不可逆过程，这是朗道尔原理以及引力辐射传递信息这一事实的直接结果。我们将得到一个测量与辐射信息相对应的辐射能量部分的表达式，以及一个定义该过程中擦除的总比特数的表达式，还有一个将后者与邦迪新闻函数联系起来的显式表达式。
