Recent content by sayetsu

Yes, I did mean "omniscience." Autocomplete your with my glasses off. Thanks. I forget what a "light cone" is. Would you please explain?

Would you please elaborate? Even if there are probabilities for different outcomes, once the wave function collapses, I'd ithink it'd be possible to see how it "got there." This is in principle, of course; I'm far from a QM expert.

I'm wondering if the information of those past events would be enough for someone in the present with hypothetical omnipotence to wind the clock backwards, as it were, and know the entire history of the universe up to this point.

But the past is set, yes?

Oh, my question was specifically about the past. With presently available quantum information, could he reconstruct the history of the universe, basically?

I've heard about quantum information, how information can't be created or destroyed, etc. I don't know a lot about this stuff. Would the demon work in theory?

A philosopher makes a distinction between "substance causation" and "event causation." If a speeding car (substance) hits a pedestrian, does the collision with the car (touching it while it's moving fast) kill the person, or does the transfer of kinetic energy or something - what, exactly...

A philosopher whose work I'm using in a paper uses a radium atom's decay as an example of a "spontaneous power," or an uncaused event. My professor, though, says "quantum fluctuations" cause radioactive decay. What are these fluctuations, and do we know what causes them? It's a college paper, so...

Summary:: I have an idea for a sci-fi story in which something like a headband or electrodes in the brain could be used for augmented reality. Could such devices work physically? This might be partially in the realm of neuroscience, but could a headband create a pinpointed magnetic field (in...

If I hold a ball above the ground, it has potential energy. Once gravity pulls on it, it becomes kinetic. What is gravity and how does it convert one kind of energy to another?

Thanks! :)

I've only encountered it academically in my college chem class. I don't know a lot, but the average bear couldn't tell you what a quark is, for example. That's what I meant.

Some, yes. More than the average bear.

But what are quantum states and unitarity? What do these words mean?

Quantum no-hiding theorem experimentally confirmed for first time (phys.org)