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CSR Racing 2

Quantum Wave in a Box

Last Update
Jan 27, 2017
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Schrödinger equation solver 1D. User defined potential V(x). Diagonalization of hamiltonian matrix. Animation showing evolution in time of a gaussian wave-packet.<br><br>In Quantum Mechanics the one-dimensional Schrödinger equation is a fundamental academic though exciting subject of study for both students and teachers of Physics. A solution of this differential equation represents the motion of a non-relativistic particle in a potential energy field V(x). But very few solutions can be derived with a paper and pencil.<br><br>Have you ever dreamed of an App which would solve this equation (numerically) for each input of V(x) ?<br><br>Give you readily energy levels and wave-functions and let you see as an animation how evolves in time a gaussian wave-packet in this particular interaction field ?<br><br>Quantum Wave in a Box does it ! For a large range of values of the quantum system parameters.<br><br>Actually the originally continuous x-spatial differential problem is discretized over a finite interval (the Box) while time remains a continuous variable. The time-independent Schrödinger equation H ψ(x) = E ψ(x), represented by a set of linear equations, is solved by using quick diagonalization routines. The solution ψ(x,t) of the time-dependent Schrödinger equation is then computed as ψ(x,t) = exp(-iHt) ψ₀(x) where ψ₀(x) is a gaussian wave-packet at initial time t = 0.<br><br>You enter V(x) as RPN expression, set values of parameters and will get a solution in many cases within seconds ! <br><br>- Atomic units used throughout (mass of electron = 1)<br>- Quantum system defined by mass, interval [a, b] representing the Box and (real) potential energy V(x).<br>- Spatially continuous problem discretized over [a, b] and time-independent Schrödinger equation represented by a system of N+1 linear equations using a 3, 5 or 7 point stencil; N being the number of x-steps. Maximum value of N depends on device’s RAM: up to 4000 when computing eigenvalues and eigenvectors, up to 8000 when computing eigenvalues only.<br>- Diagonalization of hamiltonian matrix H gives eigenvalues and eigenfunctions. When computing eigenvalues only, lowest energy levels of bound states (if any) with up to 10-digit precision.<br>- Listing of energy levels and visualisation of eigenwave-functions.<br>- Animation shows gaussian wave-packet ψ(x,t) evolving with real-time evaluation of average velocity, kinetic energy and total energy.<br>- Toggle between clockwise and counter-clockwise evolution of ψ(x,t).<br>- Watch Real ψ, Imag ψ or probability density |ψ|².<br>- Change initial gaussian parameters of the wave-packet (position, group velocity, standard deviation), enter any time value, then tap refresh button to observe changes in curves without new diagonalization. This is particularly useful to get a (usually more precise) solution for any time value t when animation is slower in cases of N being large.<br>- Watch both solution ψ(x,t) and free wave-packet curves evolve together in time and separate when entering non-zero potential energy region.<br>- Zoom in and out any part of the curves and watch how ψ(x,t) evolve locally.

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May 29, 2018

Used to work great. Now crashes when loading and dumps back to home screen in one second.

CSR Racing 2

About Quantum Wave in a Box

Developed by Michel Ramillon.

Quantum Wave in a Box is ranking in   Education

Last update was at Jan 27, 2017and the current version is 1.0.2.

To see all other keys and revenue click here 1179258292

Quantum Wave in a Box have a 1a user reviews.

Quantum Wave in a Box was released in the App Store. It is developed by Michel Ramillon, who have also released the following apps.

Quantum Wave in a Box has 1 user reviews.​

Quantum Wave in a Box has an average rating of 2.0. ​The latest version of Quantum Wave in a Box 1.0.2​ ​​was ​released on Jan 27, 2017​.

You can download Quantum Wave in a Box ​here

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