epraya.Pauli

Pauli(s)

Defines the Pauli matrices for the spin s.

Parameters:

s (float) – Spin operator value of the system.

Returns:

• sx (np.array) – Pauli matrix of the spin x component.

• sy (np.array) – Pauli matrix of the spin y component.

• sz (np.array) – Pauli matrix of the spin z component.

  Example

• ——-

• >>> import epraya as epr

• >>> s = 1

• >>> sx, sy, sz = epr.Pauli(s)

• >>> print(sx, sy, sz)

• [[0. +0.j 0.70710678+0.j 0. +0.j] – [0.70710678+0.j 0. +0.j 0.70710678+0.j] [0. +0.j 0.70710678+0.j 0. +0.j]]

• [[ 0.+0.j -0.-0.70710678j 0.+0.j ] – [ 0.+0.70710678j 0.+0.j -0.-0.70710678j] [ 0.+0.j 0.+0.70710678j 0.+0.j ]]

• [[ 1. 0. 0.] – [ 0. 0. 0.] [ 0. 0. -1.]]