mm.physics.gaussian.fidelity

mrmustard.physics.gaussian.fidelity(mu1, cov1, mu2, cov2)

Returns the fidelity of two gaussian states.

Reference: arXiv:2102.05748, equations 95-99. Note that we compute the square of equation 98.

Parameters:

• mu1 (Vector) – the means vector of state 1

• mu2 (Vector) – the means vector of state 2

• cov1 (Matrix) – the covariance matrix of state 1

• cov1 – the covariance matrix of state 2

Returns:

the fidelity

Return type:

float

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