qml.devices.default_gaussian.fock_expectation

fock_expectation(cov, mu, params, hbar=2.0)

Calculates the expectation and variance of a Fock state probability.

Parameters

• cov (array) – \(2N\times 2N\) covariance matrix

• mu (array) – length-\(2N\) vector of means

• params (Sequence[int]) – the Fock state to return the expectation value for

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

Returns

the Fock state expectation and variance

Return type

tuple

code/api/pennylane.devices.default_gaussian.fock_expectation

 

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