# Recent content by Harmony

1. ### Transfer of Quantum State

Thanks for your help, I really appreciate it. The reason i ask about the transfer of states, is because that I plan to write a story which involved a "stolen" quantum states ie experimenter B steal the quantum states of photons from A and make the original photons randomly oriented. I am...
2. ### Transfer of Quantum State

Hmm....so would it be safe to say that, experimenter B can't "steal" the information from A without exchanging the photon or ask the information from A like you said?
3. ### Transfer of Quantum State

Hmm..that means if they aren't entangled before, there isn't anyway to make them entangled? Meaning that, if the photons are not prepared from the same source, there is absolutely no change for the transfer to occur?
4. ### Transfer of Quantum State

An experimenter, A, has prepared four photons with known polarization states. In another lab, experimenter B has prepared four photons with random orientation. Is it possible, for the photons prepared by B, to take the polarization states of the photons prepared by A, without B knowing the...
5. ### Coefficient of (1+x+x^2)^n

I am fine with that expression. The only thing is I don't quite understand the derivation (like how you express the right hand theorem). Or maybe I am just being too sleepy..:)
6. ### Coefficient of (1+x+x^2)^n

I have looked into it as well. The formula doesn't express the function in terms of x^k alone, and i have problem converting the expression...
7. ### Coefficient of (1+x+x^2)^n

I need to find a formula that describe the sequence shown above. (The sequence is highlighted.) I am aware that the sequence is the coefficient of the polynomial (1+x+x^2)^n, and have tried using Taylor's expansion. Still, I can't get a nice formula that describe the sequence. Any help/hint...
8. ### Modelling of Car Impact

I have done some googling online, and there are fair bit of journals and articles describing how to define the contact force and the changes during the collision. Haven't manage to look through all of those thoroughly, but from first glance, the articles on impact modelling that i have read...
9. ### Modelling of Car Impact

I know that real car would crumple, and it is hard to estimate to what extend would a particular vehicle crumple in an impact. For simplicity, i would assume rigid body case first. In such case how can i proceed with my modelling?
10. ### Modelling of Car Impact

I am trying to model the following situation: Let say i have an obstacle with known mass, and I know the coefficient of static and dynamic friction between the obstacle material and the floor. A car travelling at a fixed velocity is to impact the obstacle. For simplicity i will first consider...
11. ### Hyperplane math homework

[PLAIN]http://img823.imageshack.us/img823/1883/questiona.png [Broken] Thanks for your help. I am stuck with the next part of the question though. I know that a and b will lies on the different side of the line/plane/hyper plane, but I am not too sure how to provide a rigorous proof for that...
12. ### Hyperplane math homework

Homework Statement [PLAIN]http://img835.imageshack.us/img835/1108/question.png [Broken] The Attempt at a Solution I understand that the determinant represents the set of points, x in R_k which lies in the hyper plane passing through the points p1, p2.....p_k. I also know, that if the...
13. ### Wavefront Simulation using Geometry Optics and Physical Optics

I am required to simulate the propagation of a the wavefront produced by a laser light (about 633 nm) passing through a system of lens and undergoes a few reflection. What I did at the moment is to do ray tracing, record the optical path length of each ray, then connect every point of the same...
14. ### Solving Laplacian Equation Analytically

Yes, I read about that. But the problem is, there are so many possible combinations (different products of function y and function x), and how should i use the boundary condition to find the one I need?
15. ### Solving Laplacian Equation Analytically

I wish to solve a 2D steady state heat equation analytically. The boundary is a square. The top side is maintained at 100 C, while the other sides are maintained at 0 C. The differential equation governing the temperature distribution will be the laplacian equation. To solve the equation...