"Quantum Echo" may sound like a bit of new-agey rubbish, but I hope that reading this post will help you understand what I mean when I talk about
Quantum Echoes of the Past.
Imagine I tossed a coin and covered it as it landed.
"Heads or tails?"
You might be able to guess, but until the coin is uncovered the correct answer is heads
and tails because the coin exists in a
quantum superposition. It's not till the moment you look at the coin that the superposition collapses into a single result; heads
or tails. This is a simple example of what is called the "
Uncertainty Principle" and it is one of the core principles of quantum physics.
But what happens to the other possible states when they collapse into a single outcome? Some scientists think the alternate outcomes
continue to exist in alternate dimensions. However, I have reason to believe that they collapse, releasing Quantum Echoes as a result.
Allow me to explain the basic idea. When the superimposed states collapse, there is a sort of implosion followed by a "supernova" of virtual particles ejected at extremely high speeds. The virtual particles dissipate into the ether,
except when they collide with the environment. In such a case, they bounce off, like an echo bouncing off a wall. This is what causes Quantum Echoes. Just like a sonic echo, a Quantum echo is a diminished, or faded impression of the original, sometimes only a fragment. Because of the high speeds involved, the quantum echo could appear very far in the future (due to a relativistic
time diliation).
What does all of this have to do with Ghosts?
If my theory is correct, we might expect to see faded impressions of past events replaying themselves at temporal intervals. What would you think if you saw a translucent soldier from the American Civil War running across a historic battlefield? A logical person would probably conclude that they'd seen a ghost.
The implications of this theory could upend everything we think we know about ghosts. However, until I can conduct more experiments, it remains an unproven theory... for now.