spheres.symplectic.upgrade_two_mode_operator

spheres.symplectic.upgrade_two_mode_operator(O, i, j, n_modes)[source]

Upgrades a two mode real symplectic matrix to act on subsystems i and j of n modes, (where the modes are represented in terms of their first and second moments).

Parameters

  • O (np.array) – Two mode operator.

  • i (int) – First mode to act on.

  • j (int) – Second mode to act on.

  • n_modes (int) – Of how many modes.

Returns

U – Upgraded operator.

Return type

np.array