/// <summary>
/// Shifts position of the potential in for 10µm in x direction in the beginning. Afterwards the
/// time-evolution of the wave function is calculated, using the Bit Reversal algorithm.
/// </summary>
private void shiftPotButton_Click(object sender, EventArgs e)
{
gpe.changeCenterOfV(Math.Pow(10, -5) * 1); // Shift of the potential
plotV.Points.Clear(); // Deleting the data points of the previous potential
//Creates the data points for the new potential
for (int k = 0; k < gpe.psi.Length; k++)
{
plotV.Points.Add(new DataPoint(gpe.X[k], gpe.V[k]));
}
potModel.Series.Clear(); // deletes previous data series
potModel.Series.Add(plotV); // adds new data series
this.plot1.Model = potModel; // shows new plot of the potential
double[,] dataMap = new double[gpe.psi.Length, tsteps / 100];
int writeOut = 0;
for (int i = 0; i < tsteps; i++)
{
//Calculation of Ψ(t) using the split-step-fourier-method using the bit-reverse algorithm for the FFT
gpe.splitStepFourier("BR");
// Writing every 100th calculated value into the plot array
if (i == writeOut)
{
for (int k = 0; k < gpe.psi.Length; k++)
{
dataMap[k, i / 100] = Math.Pow(gpe.psi[k].Norm(), 2);
}
writeOut += 100;
}
}
//ColorMap
maxColor = OxyPlot.ArrayExtensions.Max2D(dataMap);
ColorBarSeries.Y1 = maxColor;
heatPsi.Data = dataMap; // Writes calculated data series into plot array
timeModel.Series.Clear(); // clears plot model from previous data series
timeModel.Series.Add(heatPsi); // adds new data series
this.plot1.Model = timeModel; // shows new data series in plot
}
/// <summary>
/// Starts the calculation of the time development of the wavefunction under given parameters.
/// As starting wave function it is either used the ground state wave function, if calculated before
/// or a default one, or another one, if the double BEC checkbox is selected.
/// </summary>
private void button1_Click(object sender, EventArgs e)
{
getParams(); //read-out of the parameters
// Initialization of the GPE solver, transferring the read-out parameters
gpe = new GPESolver(mass, anzahl, sclength, wx, wr);
double[] normedPsi = new double[gpe.psi.Length]; //Creation of the array for |Ψ|²
//Plot of the trap potential, that is shown during the calculation of the time-evolution calculation
plotV.Points.Clear(); // Deletes previous data points from the data series
//Creation of the new data series for the plot of the potential
for (int k = 0; k < gpe.psi.Length; k++)
{
plotV.Points.Add(new DataPoint(gpe.X[k], gpe.V[k]));
}
potModel.Series.Clear(); // Deletes previous data series from the plotmodel
potModel.Series.Add(plotV); // Adds new data series to the plotmodel
this.plot1.Model = potModel; // Shows the potential plot
// Preparation of the time-dependent plot
// Creation of the data grid for the time-dependent plot of |Ψ|²
heatPsi.X0 = gpe.X[0]; // set xmin
heatPsi.X1 = gpe.X[gpe.xSteps - 1]; // set xmax
heatPsi.Y0 = 0;
heatPsi.Y1 = gpe.deltaT * tsteps; //set the height of the plot
heatPsi.Interpolate = true; //switch on color gradient
//Creation of two color scales, using the 'Jet-palette'
LinearColorAxis cAxis = new LinearColorAxis();
cAxis.Palette = OxyPalettes.Jet(100);
LinearColorAxis cAxisC = new LinearColorAxis();
cAxisC.Palette = OxyPalettes.Jet(100);
ColorBarModelE.Series.Clear();
this.ColorBar.Model = ColorBarModelE; //Prevents bug with colorbar if time evolution is selected before starting calculation. Reason unknown.
timeModel.Axes.Add(cAxis); // Adding the color axis
ColorBarModel.Axes.Add(cAxisC);
double[,] dataMap = new double[gpe.psi.Length, tsteps / 100]; //Initializing data array for time-dependent plot
double[,] ColorMap = new double[10, 10000]; //Initializing data array for color bar
Stopwatch Stopwatch1 = new Stopwatch(); // Initialisation of the stopwatch
Stopwatch1.Start(); // Start of the stopwatch
//deciding which method to use for the time-development-calculation,
//if there is no method chosen, Bit-Reverse is used
string method;
if (FFTCheckBox.Checked)
{
method = "CT";
}
else if (DFTCheckBox.Checked)
{
method = "DFT";
}
else if (bitReverse.Checked)
{
method = "BR";
}
else
{
method = "BR";
}
// The starting wave function is created, either using the default one (see GPESolver) or the ground state
// is calculated, or the double BEC function is used with the offset chosen in the GUI
ComplexNumber[] psiStart = (ComplexNumber[])gpe.psi.Clone();
if (getgroundstate.Checked)
{
gpe.getGroundState();
}
else if (DBECCheckBox.Checked)
{
offsetDBEC = Convert.ToInt32(OffsetDBECTextBox.Text);
gpe.getDPsi(offsetDBEC);
}
int writeOut = 0;
for (int i = 0; i < tsteps; i++)
{
// Calculation of Ψ(t) using the split-step-fourier method using the chosen algorithm for the FFT
gpe.splitStepFourier(method);
// Writing every 100th calculated value into the plot array
if (i == writeOut)
{
for (int k = 0; k < gpe.psi.Length; k++)
{
dataMap[k, i / 100] = Math.Pow(gpe.psi[k].Norm(), 2);
}
writeOut += 100;
}
}
Stopwatch1.Stop(); // Stops the time after calculation
LaufzeitTextBox.Text = Convert.ToString(Stopwatch1.ElapsedMilliseconds); // Shows runtime in textbox
listBox1.Items.Insert(0, method + "-FFT:" + " " + Convert.ToString(Stopwatch1.ElapsedMilliseconds) + "ms" + " Timesteps" + tsteps.ToString()); // Adds runtime, used method and number of time steps to listbox
maxColor = OxyPlot.ArrayExtensions.Max2D(dataMap); //@David ich weiß leider nicht so richtig was das macht
for (int k = 0; k < 10000; k++)
{
for (int l = 0; l < 10; l++)
{
ColorMap[l, k] = maxColor * k / 10000;
}
}
// Creation of the data grid for the display of the colorbar
ColorBarSeries.X0 = 0; //set xmin
ColorBarSeries.X1 = 10; //set xmax
ColorBarSeries.Y0 = 0; //set height of the colorbar
ColorBarSeries.Y1 = maxColor;
ColorBarSeries.Interpolate = true; //switch on color gradient
//Preparing Oxyplot
heatPsi.Data = dataMap; // Write calculated data into plotarray
ColorBarSeries.Data = ColorMap; // Write calculated data into plotarray
timeModel.Series.Clear();
timeModel.Series.Add(heatPsi); // Add plotarray to plotmodel
// Add the recent data series to the color bar model
ColorBarModel.Series.Clear();
ColorBarModel.Series.Add(ColorBarSeries);
//Calculating |Ψ|² and |Ψstart|² and writing it into the plot arrays
for (int k = 0; k < gpe.psi.Length; k++)
{
normedPsi[k] = Math.Pow(gpe.psi[k].Norm(), 2);
plotPsi.Points.Add(new DataPoint(gpe.X[k], normedPsi[k]));
normedPsi[k] = Math.Pow(psiStart[k].Norm(), 2);
plotPsiStart.Points.Add(new DataPoint(gpe.X[k], normedPsi[k]));
}
// Deleting the old series and add the new ones
myModel.Series.Clear();
myModel.Series.Add(plotPsiStart);
myModel.Series.Add(plotPsi); //
this.plot1.Model = timeModel; // Show the time-dependent plot
this.ColorBar.Model = ColorBarModel; // Show the created color bar
this.ColorBar.Visible = true; // Make the color bar visible
this.shiftPotButton.Enabled = true; // The shift potential button is usable now
//Energy = ETC.Hamilton(gpe.psi, gpe.V, gpe.deltaX, PhysConst.hbar, mass, gpe.g1D);
//EnergieTextBox.Text = Convert.ToString(Energy); //Energie in TextBox
}