The "afterlife" according to special relativity postulated by Einstein

Let's discuss the physics of the deceased grandma now. A young man and I were riding in a taxi together when he asked, "Oh, can I ask you an inquiry about quantum mechanics?" I informed him I was a physicist. Therefore, I said, "Well, okay, go on." And he continued, "A shaman told me that quantum mechanics is why my grandmother is still alive. Is this correct? I had to take a moment to grasp it, and after giving it some thought, I realised it was not altogether incorrect. The fact is, however, that it has anything to do with quantum mechanics. It has nothing to do with Einstein's special theory of relativity. It's a discussion of the temporal reality. It all comes down to whether the current moment—the now that we experience for ourselves—is of the utmost significance. There are many things that science can provide some light on, including those significant existential concerns concerning the afterlife. Time served as this fundamental parameter before Einstein. The present moment that we could all agree upon was the same moment that we all shared. However, Einstein later showed in and remarked, "Well, it's just not that simple." The main cause of this is that nothing can move faster than the velocity of light, which is constant for all observers and has a finite speed. And while this seems like an incredibly innocent assumption, it has a very basic consequence that is quite simple to explain. Naively, we might respond, "Yes, certainly it's there, I imply that I'm holding it in my hand, or I see it right in front of me," if you were to inquire as to whether you were aware that the screen in before of you was truly there at the time. However, as we recently discovered, the speed of light is limited and cannot be exceeded. As a result, everything you encounter and observe appears as though it happened just a moment ago. So how can you be certain that anything exists now? What exactly do you mean by "now"? Therefore, this is the issue with Einstein's hypothesis regarding special relativity. In his attempt to include a concept of "now" into this novel theory, Einstein was unsuccessful. Consider the situation where a train passes directly in front of you, perhaps from the left to the right. Your friend, let's name her Alice, is also aboard the train. Let's now add the scenario that light flashes occur at the precise instant Alice, positioned in the middle of the train, is looking directly at you. Do these light flashes appear to have occurred simultaneously? Now, responding to this question by focusing on the train is rather simple. The lights are flashing like that. They both originate from places that are located equidistant from you. Naturally, you observe them simultaneously. However, how does Alice's perspective of the identical situation appear? The light flashes, but as it moves towards her, she travels in the opposite direction of the light sources, making one path of illumination shorter and the other longer. Therefore, the light flash coming from the front of the train seems earlier than the one coming from the back from Alice's perspective. She would therefore respond, "No, they weren't happening at the same time." The fact that this is relativity is now crucial. Both of these are incorrect, but neither is right. Both perspectives are equally legitimate. What do we deduce from this, then? We might infer from the above that there is no clear definition of what is happening because it relies on the observer. They are both correct, so. And if you continue this reasoning to the end, every moment may be right now for someone. And that covers all of your present as well as all of your past and future times. The "relativity of simultaneity" is the term used to describe the difficulty of defining a single concept of now that everyone can agree on. And that's quite significant because it shows us that this sense of the present we all experience is ultimately useless. To explain the limited nature of the speed of light, the relativity of concurrently, and the lack of the present, Einstein developed the mathematical framework known as spacetime, which combines space and time into a single, coherent whole. All of this spacetime exists in this current moment and is referred to as the block universe because the present has no essential meaning. The past, present, and future are all the same in the block universe. There is simply no way to highlight one particular moment as being exceptional. So, just as the present moment currently exists, so does the previous one in which your granny is still living. There is another approach to look at the notion that those who have passed away regrettably still exist in some manner, and it has to do with how all the basic rules of nature that we are aware of operate. They do not destroy information. They rearrange matter, radiation, and everything else that exists in the universe; all they do is provide instructions on where to position each element and how fast to move it. But those guidelines are applicable both ahead and backwards. And because of this, you could theoretically always figure out what had happened previously if you had a truly, really good computer. Information cannot be destroyed in this sense. However, it can become practically difficult to retrieve. Physicists have examined two scenarios where information could be lost but have not yet found solutions: The data that goes into a black hole is one of them. What truly transpires with it is unknown. The other is the enigmatic quantum mechanical measuring process, which is also an unsolved issue. So, as we all know, if someone you know passes away, you can no longer contact them. And the reason for this is that the data that makes up a person's personality diffuses into incredibly delicate correlations in the body's remnants, entangling everything around them. And gradually, they dispersed into radiation that permeated the solar system and, ultimately, the entire universe. However, this is very anthropomorphic: It's closely related to our being alive, and nobody can predict what will happen to human nature in a billion years. Perhaps some cosmic consciousnesses will likewise be dispersed, and this knowledge will once more be available. Therefore, despite what we know about Einstein's theories, the fundamental laws of physics, and how our present theories function, our very existence transcends the flow of time. I know that sounds absurd. The information that makes up both us, as well as everything else in the cosmos, has a timeless quality. And I believe it's a truly profound spiritual realisation that comes directly from research into the physics fundamentals. And I must admit, it's incredibly challenging for me to understand it intuitively. One method to approach mathematics is to say, "Okay, this is how it works." These are the inferences we make based on what we see, and mathematics accurately captures them. To understand this in your daily life is quite another matter. But I take this seriously because, as a physicist, I believe in the scientific method's ability to lead to new understanding.