Search found 548 matches

by Tchebu
Sat Dec 30, 2017 4:56 pm UTC
Forum: Science
Topic: How does color charge work?
Replies: 4
Views: 598

Re: How does color charge work?

Your mind has an ass?? whoa... :lol: You really shouldn't think of the transition from electric to color charge as a transition from "2 kinds of charge" to "3 kinds of charge". There aren't two kinds of electric charge, there's just one and it can take negative values. Similarly,...
by Tchebu
Mon Dec 25, 2017 5:16 pm UTC
Forum: Science
Topic: Quantum Question
Replies: 55
Views: 2952

Re: Quantum Question

I can't really justify it beyond a gut-feeling, and I should have said TOE rather than GUT, but I remain convinced that there is a fundamental missing piece, a connection, as significant as the discovery of atoms or relativity I mean... sure, there is. But there's also been progress towards it, and...
by Tchebu
Sun Dec 24, 2017 3:53 am UTC
Forum: Science
Topic: Quantum Question
Replies: 55
Views: 2952

Re: Quantum Question

Grand unification (or lack thereof), black-holes and information, gravity, dark matter None of those are problems with the conceptual foundations of quantum mechanics. Grand unification and dark matter are both problems of finding specific quantum mechanical models that have these features and conf...
by Tchebu
Mon Dec 11, 2017 6:23 am UTC
Forum: Science
Topic: Quantum Question
Replies: 55
Views: 2952

Re: Quantum Question

Oh yeah, interpretations of QM are definitely philosophy. My only point is that superposition is a very real feature in almost all of them and is not observer dependent in any of them. (I say "almost", only to not leave out non-local hidden variables... but given your fondness for relativi...
by Tchebu
Mon Dec 11, 2017 4:15 am UTC
Forum: Science
Topic: Quantum Question
Replies: 55
Views: 2952

Re: Quantum Question

Yeah, I suppose I ignored your addition of the timer/camera. Those should be treated as additional parts of the system. Having the camera take a picture at some time, basically does the same as having Alice look at the cat. It entangles the states of the camera and the cat, leaving the combination o...
by Tchebu
Sun Dec 10, 2017 10:00 pm UTC
Forum: Science
Topic: Quantum Question
Replies: 55
Views: 2952

Re: Quantum Question

I guess I don't see how the opening of the inner box needs to be quantum-linked, so long as the cat-poisoning is linked to one. If you want to end up with a superposition of "Alice looked" and "Alice hasn't looked", you need to link it to a quantum event, for exactly the same re...
by Tchebu
Sun Dec 10, 2017 12:26 am UTC
Forum: Science
Topic: Quantum Question
Replies: 55
Views: 2952

Re: Quantum Question

Maybe we're thinking of different experiments? Well we've gone through many different variations of it at this point. My original objection was to you including "Alice hasn't looked" as part of the superposition in the "nested boxes" variation, where I pointed out that it will o...
by Tchebu
Sat Dec 09, 2017 6:03 pm UTC
Forum: Science
Topic: Quantum Question
Replies: 55
Views: 2952

Re: Quantum Question

^ that. Also, Only if the cat was poisoned. But you could also open the box and find the cat was not poisoned at all, but was just mad at being kept cooped up in a box. No, no I couldn't. If I set up the experiment as intended and made no mistakes, with the poison bottle being triggered by a timer, ...
by Tchebu
Sat Dec 09, 2017 3:08 am UTC
Forum: Science
Topic: Quantum Question
Replies: 55
Views: 2952

Re: Quantum Question

Classicality isn't about having "too many states to bother keeping track of" it's about the uncertainty in our observables. For a cat dying via classical poisoning, its "health" observable has very small uncertainty throughout the entire process. I can do the experiment 100 times...
by Tchebu
Fri Dec 08, 2017 10:39 pm UTC
Forum: Science
Topic: Quantum Question
Replies: 55
Views: 2952

Re: Quantum Question

Not necessarily "all it's possible states", at least certainly not with equal coefficients. Which superposition you'll get depends on the Hamiltonian (i.e. the time-evolution rules) of the system (and the initial state, of course). Compare Schroedinger's cat to its more fortunate sibling p...
by Tchebu
Fri Dec 08, 2017 6:47 pm UTC
Forum: Science
Topic: Quantum Question
Replies: 55
Views: 2952

Re: Quantum Question

So, what's inside the (outer) box remains superposed as far as we are concerned.


Yes, but in the usual setup, where opening the box is not governed by a quantum event, that superposition doesn't include states in which Alice hasn't looked at the cat.
by Tchebu
Wed Dec 06, 2017 3:37 pm UTC
Forum: Science
Topic: Quantum Question
Replies: 55
Views: 2952

Re: Quantum Question

d. We "see" (and "saw") a superposition of {{dead|live} cat and Alice not looking}, {dead cat and Alice looking}, and {live cat and Alice looking}. Small nitpick. You'll only get this particular superposition if you somehow rig the lid of the box to only open when a radioactive ...
by Tchebu
Sat Dec 02, 2017 3:30 pm UTC
Forum: Science
Topic: Quantum Question
Replies: 55
Views: 2952

Re: Quantum Question

You can definitely just trust Alice to open the box at a given time. This simply corresponds to knowing the Hamiltonian (i.e. the rules of time-evolution) of the Alice+cat system which is part of the assumptions in the thought experiment. "Opening the box at noon" just corresponds to turni...
by Tchebu
Thu Sep 14, 2017 10:38 pm UTC
Forum: Science
Topic: What exactly does unification mean in physics?
Replies: 6
Views: 1352

Re: What exactly does unification mean in physics?

Both of eSOANEM's responses are entirely correct, but if they're over your head perhaps I can have a stab at explaining this without the technical jargon. This will be long however because I want to start real simple and apologies if I overdo it and start way under(?) your head... You're actually pr...
by Tchebu
Mon Feb 06, 2017 7:40 pm UTC
Forum: Science
Topic: The (somewhat ridiculous?) holographic principle
Replies: 4
Views: 2541

Re: The (somewhat ridiculous?) holographic principle

I second what Tub is saying and would like to expand on it a bit. Regarding the holographic principle specifically, it is not a model by itself, it's a statement about the theoretical structure of gravity theories. It's the statement that a clever reshuffling of the degrees of freedom in a theory of...
by Tchebu
Mon Oct 03, 2016 3:40 am UTC
Forum: Science
Topic: Is entanglement that surprising?
Replies: 27
Views: 5515

Re: Is entanglement that surprising?

That approach rubs me the wrong way. While I'm sure its mathematically valid, it seems iffy to imagine it that way, given that the actual theory of QM (AFAIK) talks about the states of particles in fairly absolute (although non-classical) terms, not in terms of abstract correlations, i.e. the state...
by Tchebu
Fri Sep 23, 2016 11:11 pm UTC
Forum: Science
Topic: Is entanglement that surprising?
Replies: 27
Views: 5515

Re: Is entanglement that surprising?

One slogan for entanglement is "correlation without correlata". In classical mechanics there's an (anti-)correlation between the handedness of two gloves, but we're used to thinking that the process that makes the two gloves (i.e. the glove factory) achieves this correlation by "first...
by Tchebu
Sun Feb 21, 2016 3:16 am UTC
Forum: Science
Topic: Should we consider string theory to be science? (Philosophy)
Replies: 32
Views: 4844

Re: Should we consider string theory to be science? (Philoso

"String theory" has basically the same status as "quantum field theory" in that it's a mathematical framework/toolkit. Within that framework you can have a multitude of specific models. In QFT these models are specified by the field content and the coupling constants between them...
by Tchebu
Sat Feb 20, 2016 5:05 am UTC
Forum: Science
Topic: Should we consider string theory to be science? (Philosophy)
Replies: 32
Views: 4844

Re: Should we consider string theory to be science? (Philoso

I also feel that besides it being an extreme version of the needle in a haystack problem, part of the reason why we still don't know the quantitative answer to your question is that I don't think people are all that interested in pinpointing the exact compactifications to get the SM, since that's n...
by Tchebu
Thu Feb 11, 2016 5:59 am UTC
Forum: Science
Topic: Should we consider string theory to be science? (Philosophy)
Replies: 32
Views: 4844

Re: Should we consider string theory to be science? (Philoso

Yeah, the 10^500 or whatever is the rough estimate of the number of different topologies the compactified space can have and the kinds of fluxes you can put along various cycles in that space. Each choice leads to a different effective 4D theory. As for your first question, it's definitely not optio...
by Tchebu
Wed Feb 10, 2016 8:21 pm UTC
Forum: Science
Topic: Should we consider string theory to be science? (Philosophy)
Replies: 32
Views: 4844

Re: Should we consider string theory to be science? (Philoso

Just thought I'd comment on what string theory takes as input and what it does or does not predict. The starting point for string theory is to study the motion of a string (i.e. a one-dimensional object with some tension/energy-density) in a spacetime which locally obeys special relativity. You then...
by Tchebu
Tue Apr 28, 2015 2:58 am UTC
Forum: Science
Topic: On friction
Replies: 17
Views: 3151

Re: On friction

Hold my horses so µ=0.25 m is unknown My calculations give me http://i148.photobucket.com/albums/s17/B-A-M-M/screw%20this_zpsq0ue84qn.png 0.25=F/m*9.81 => F= m*9.81/4 => 0.25=(m*9.81/4)/m*9.81 a=(((m*9.81)/4)-0.25*m*9.81)/m => a=0/m or ma=0 Therefore, mass and acceleration does not exist Your first...
by Tchebu
Fri Apr 17, 2015 6:15 am UTC
Forum: Science
Topic: A solution to the black hole information paradox?
Replies: 2
Views: 1589

Re: A solution to the black hole information paradox?

If I'm reading the paper correctly, they're basically using a foliation of spacetime whose spatial slices are entirely outside the horizon and the mode decomposition is therefore also made up of modes that have support outside the horizon. This means that they never perform a trace over modes inside...
by Tchebu
Fri Nov 28, 2014 9:15 pm UTC
Forum: Science
Topic: A new Theory on fundamental physics
Replies: 33
Views: 7075

Re: A new Theory on fundamental physics

don't be mistaken, I am not trying to kill the SM at all. There is not even a possibility to it, because (almost ?) anything new can be integrated to it. A fifth force, one more symmetry, one more particles generation, almost anything you want. It looks pretty much like the model was initially buil...
by Tchebu
Wed Sep 10, 2014 3:47 pm UTC
Forum: Science
Topic: Schrodinger Cat Disproof (Samuel Jacobs)
Replies: 88
Views: 17894

Re: Schrodinger Cat Disproof (Samuel Jacobs)

I am confused as to how you can find any fault in my completely reasonable assumptions, but I am open minded to any reasonable argument from you, if you are able to demonstrate one. As was pointed out, one of your assumptions is that "Dead" and "Alive" are disjoint sets whose un...
by Tchebu
Mon Sep 08, 2014 11:17 pm UTC
Forum: Science
Topic: Schrodinger Cat Disproof (Samuel Jacobs)
Replies: 88
Views: 17894

Re: Schrodinger Cat Disproof (Samuel Jacobs)

Let there be a sample space which encompasses every object. Let the sample space be divided into two sets which do not intersect each other and are called dead and alive. This is the problem. The whole point of QM is that you can't make such a division. For any observable with two outcomes, the ful...
by Tchebu
Fri Aug 01, 2014 3:59 pm UTC
Forum: News & Articles
Topic: Ukraine Crisis [New Title]
Replies: 891
Views: 141209

Re: Ukraine Crisis [New Title]

Russia sees the area as naturally subordinate to its great power ambitions and is willing to throw its weight, military and economic, around in order to push countries into line. Has Russia ever done anything military "to push countries into line" except when there is talk of them joining...
by Tchebu
Thu Jul 31, 2014 9:31 pm UTC
Forum: News & Articles
Topic: Ukraine Crisis [New Title]
Replies: 891
Views: 141209

Re: Ukraine Crisis [New Title]

From the Russian viewpoint Nato is creeping towards them --- maybe the other viewpoint could be very well summarized as these countries trying to run as fast as they can from Russia, except for the fact that for countries, running away is quite difficult, so they're opting for the second best alter...
by Tchebu
Thu Jul 31, 2014 3:49 pm UTC
Forum: News & Articles
Topic: Ukraine Crisis [New Title]
Replies: 891
Views: 141209

Re: Ukraine Crisis [New Title]

I think he's going after E Ukraine now. Not the whole thing right away...he doesn't actually need that. However, he basically did get the Crimea, if he can carve off another chunk for continguous control...that's an advantage. Crimea is likely the bigger prize, but if he can pull more, or weaken Uk...
by Tchebu
Mon Jul 21, 2014 4:53 am UTC
Forum: Science
Topic: Why is cosmological inflation necessary?
Replies: 15
Views: 3348

Re: Why is cosmological inflation necessary?

To me QFs shrinking and space expanding are equivalent theories

If they are equivalent, then the horizon problem should still exist, just translated into the weird "shrinking particles" language.
by Tchebu
Fri Jul 11, 2014 4:07 am UTC
Forum: Science
Topic: String Theory and the various interpretations of QM
Replies: 21
Views: 3624

Re: String Theory and the various interpretations of QM

From what I recall, the most significant result in String Theory is that non-supersymmetric string theory can't have interactions. So, no supersymmetry -> String Theory gets a biscuit for being falsifiable, but no bone on account of its not actually being right. Unlike SUSY extensions to the standa...
by Tchebu
Sun Jul 06, 2014 5:26 pm UTC
Forum: Science
Topic: "Gravitational" time dilation on an accelerating spaceship
Replies: 20
Views: 5545

Re: "Gravitational" time dilation on an accelerating spacesh

The guy thinks, and concludes that: "it's the increasing closing speed of me and the light coming from the top that is causing the effect". In the guy's reference frame he's at rest and all light moves at the speed of light, so no he does not conclude that. As far as the guy is concerned ...
by Tchebu
Sat Jul 05, 2014 3:24 pm UTC
Forum: Science
Topic: I can't find where I'm going wrong. (perpetual motion flaw)
Replies: 19
Views: 3302

Re: I can't find where I'm going wrong. (perpetual motion fl

When you push the object into the lower half of the first tube, an equal volume of air has to go somewhere. If everything is nice and airtight, the displaced air pushes down on the water, pushing up the entire water column and squirting a volume of water equal to the object's volume from the top of ...
by Tchebu
Sat Jul 05, 2014 2:57 pm UTC
Forum: Science
Topic: Why is cosmological inflation necessary?
Replies: 15
Views: 3348

Re: Why is cosmological inflation necessary?

The main idea is to assume as little as possible about the initial state of the universe. It's pretty bad to fine-tune the laws of nature, but it's even worse to fine-tune the initial state of the universe. For laws of nature there might be some sorts of consistency conditions that we don't know abo...
by Tchebu
Thu Jun 19, 2014 4:01 pm UTC
Forum: Science
Topic: Mark McCutcheon's Final Theory of Everything
Replies: 154
Views: 26833

Re: Wrong on the Internet: The Final Theory

... people HAVE contemplated it here for the past few pages of the thread and pointed out how this theory grossly disagrees with experiment. If it disagrees with experiment, it's wrong. 1. Experimental fact: two objects of equal size remain equal size regardless of their respective masses. Furthermo...
by Tchebu
Tue Apr 22, 2014 10:10 pm UTC
Forum: News & Articles
Topic: Ukraine Crisis [New Title]
Replies: 891
Views: 141209

Re: Ukraine Crisis [New Title]

Yes, but what BETTER option did they have than what they did?

They could have not given the finger to Russia at the first chance they got...
There's a difference between being pro-EU and anti-Russian and they decided to be both.
by Tchebu
Tue Apr 22, 2014 8:45 pm UTC
Forum: News & Articles
Topic: Ukraine Crisis [New Title]
Replies: 891
Views: 141209

Re: Ukraine Crisis [New Title]

Had they taken it slower, they would not have ended up with a healthy government or a fat bank account because those things were already screwed. And they certainly have both of those things now... You do realize that the ousted president was accused of electoral fraud, right ? Kind of hard to &quo...
by Tchebu
Tue Apr 22, 2014 8:05 pm UTC
Forum: News & Articles
Topic: Ukraine Crisis [New Title]
Replies: 891
Views: 141209

Re: Ukraine Crisis [New Title]

Ehhh...I hesitate to blame them. They had some big leadership issues, and when they tried to fix those, Russian intervention kind of screwed them. The lack of money is a result of the prior admin, and the bad situation is something they got hit with immediately upon gaining power. I'm not really su...
by Tchebu
Fri Apr 18, 2014 6:40 am UTC
Forum: Mathematics
Topic: The Pythagorean Theorem and Euclidean Metric
Replies: 8
Views: 3340

Re: The Pythagorean Theorem and Euclidean Metric

Euclidean vs non-euclidean geometries differ in the "5th postulate", which is equivalent to saying that given a line, you can always draw only one and only one line parallel to it through a given point.
by Tchebu
Sat Apr 05, 2014 5:10 am UTC
Forum: Science
Topic: Are physics in the particles, or reality itself?
Replies: 60
Views: 10175

Re: Are physics in the particles, or reality itself?

I think the universe would/could still exist, it just wouldn't be anything like the current universe. Information might still exist but not energy or matter, for example. Matter exists by definition because that's the first thing you specify when you write down the theory. Information exists too, s...

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