calc_island_charges

static ThomasFermi.calc_island_charges(numerics, energy_matrix, approximate_charges)

Calculates stable integer charge configuration.

This is the configuration Q which minimizes calc_cap_energy(Q, energy_matrix, approximate_charges).

Parameters:

  • numerics (NumericsParameters) – Options for numeric calculations.

  • energy_matrix (ndarray[float]) – A 2D array with shape (num_islands, num_islands) giving the energy matrix (in meV) of the capacitance model.

  • approximate_charges (ndarray[float]) – An array with length equal to the number of islands, where each entry of the array is the integral of n(x) over the corresponding island.

Returns:

The charge configuration array which minimizes the capacitance energy. This is a 1D array with length equal to the number of islands specifying the integer number of charges on each island.

Return type:

ndarray[int]