Recent content by zekise

Yes, I guess I have reached my limits.

Hi vanhees71 -- Thank you for your long post and advice. In the above reply to my question -- I am trying to find the right terminology for a particle that is in a superposition of states w.r.t. observer D (i.e. a detector screen which is embedded in E). As we know, the particle emitted by the...

OK -- so even though the photon is in a superposition of states, it's wave function past the pinhole will be governed by wave optics.

In a double slit experiment, when we shoot the particle to the slits, the particle (photon, electron. buckyball) must have a condition that a non-measuring observer has lost the path information of the particle. Otherwise the interference pattern will not happen. What is this condition called...

Hi Nugatory -- Thanks. So let us assume the pinhole is tiny enough and the slit material is thin enough. In a double slit experiment, we do not usually bother with the perfection of the slits and the thickness or composition of the material. Because that is not the point and they have little...

Fair enough. I will try to explain. If a laser is the wrong source, then feel free to substitute that with a single photon source. My question has nothing to do with this laser issue or diffraction issue. May I ask you what do you mean by a "coherent state"? Thanks. Please assume we have a...

But that website is irrelevant in this case. Why refer to it? I asked a question. You are now asking the questions. Diffraction pattern is a red herring and a distraction/tangent. Are you saying that if we can somehow eliminate diffraction in the double slit experiment (such as by using...

I am referring to a double slit experiment. If a laser is unsuitable for that, then please feel free to replace the laser with a single photon emitting source. That is not the issue and we are going on a tangent. I am not speaking of diffraction patterns or the shape of the slit, another...

There is no such thing as the measurement problem. This is the creation of some very dated and wrong ideas, picked up by science writers to create some drama in their profession. In fact observer A can take a measurement of a particle and the particle wave function would not "collapse"...

Well yes, but you get a lot more than that. If that is all you get, then the double slit experiment would have no interference pattern. But each slit or pinhole produces a wave that interfere together creating a wide interference pattern. So if there is one slit or one pinhole, you still get...

I have only one question. I will make that clearer. If we shoot photons at a pinhole with a screen behind it, we get a circular non-interference pattern on the screen. Is this distribution Guassian, and if not, what would its wave function be? Thanks

Abstract: If a laser shoots photons at a pinhole with a screen behind it, we get a circular non-interference pattern on the screen. Is this distribution Guassian, and if not, what would its wave function be? ===================== Assume a double-slit like experiment, but instead of double...

I think you need about 10 tons of thrust per engine during cruise for a 737. If the thrust to power ratio of an electric fan is 6 kg/kW, then you need 10,000 / 6 = 1,660 kW or 1.7 MW per engine. This assumes 95% motor efficiency and 90% propulser efficiency. Developers are building 0.75 MW...

Thanks Michael. I am not sure what you mean by phases or how entropy figures into decoherence. Is it correct to say that if system A is coherent to system B, then A appears as a superposition to B. And if system A decoheres wrt system B, then an entanglement has been established between the two...

Thanks Michael. I am not sure what you mean by phases or how entropy figures into decoherence. Is it correct to say that if system A is coherent to system B, then A appears as a superposition to B. And if system A decoheres wrt system B, then an entanglement has been established between the...