qml.devices.default_gaussian.squeezed_cov¶

squeezed_cov(r, phi, hbar=2)[source]¶

Returns the squeezed covariance matrix of a squeezed state.

Parameters

• r (float) – the squeezing magnitude

• p (float) – the squeezing phase $\phi$

• hbar (float) – (default 2) the value of $\hbar$ in the commutation relation $[\x,\p]=i\hbar$

Returns

the squeezed state

Return type

array