dq.plot.wigner

wigner(
    state: QArrayLike,
    *,
    ax: Axes | None = None,
    xmax: float = 5.0,
    ymax: float | None = None,
    vmax: float = 2 / jnp.pi,
    npixels: int = 101,
    cmap: str = "dq",
    interpolation: str = "bilinear",
    colorbar: bool = True,
    cross: bool = False,
    clear: bool = False
)

Plot the Wigner function of a state.

Warning

Documentation redaction in progress.

Note

Choose a diverging colormap cmap for better results.

Warning

The axis scaling is chosen so that a coherent state \(\ket{\alpha}\) lies at the coordinates \((x,y)=(\mathrm{Re}(\alpha),\mathrm{Im}(\alpha))\), which is different from the default behaviour of qutip.plot_wigner().

Examples

>>> psi = dq.coherent(16, 2.0)
>>> dq.plot.wigner(psi)

>>> psi = (dq.coherent(16, 2) + dq.coherent(16, -2)).unit()
>>> dq.plot.wigner(psi, xmax=4.0, ymax=2.0, colorbar=False)

>>> psi = (dq.fock(2, 0) + dq.fock(2, 1)).unit()
>>> dq.plot.wigner(psi, xmax=2.0, cross=True)

>>> psi = dq.coherent(32, [3, 3j, -3, -3j]).sum(0).unit()
>>> dq.plot.wigner(psi, npixels=201, clear=True)