mrmustard.lab_dev.states

The classes representing states in quantum circuits.

Classes

BargmannEigenstate(modes[, alpha, ...])	The N-mode Bargmann eigenstate.
Coherent(modes[, x, y, x_trainable, ...])	The N-mode coherent state.
DM([representation, name])	Base class for density matrices.
DisplacedSqueezed(modes[, x, y, r, phi, ...])	The N-mode displaced squeezed vacuum state.
GDM(modes, beta[, symplectic, ...])	The N-mode mixed state described by a Gaussian gate that acts on a given thermal state.
GKet(modes[, symplectic, symplectic_trainable])	The N-mode pure state described by a Gaussian gate that acts on Vacuum.
Ket([representation, name])	Base class for all Hilbert space vectors.
Number(modes, n[, cutoffs])	The N-mode number state.
QuadratureEigenstate(modes[, x, phi, ...])	The N-mode Quadrature eigenstate.
Sauron(modes, n[, epsilon])	The n-th Sauron state is an approximation of the n-th Fock states using a ring of n+1 coherent states. The reference to the Lord of the Rings comes from the approximation becoming perfect in the limit for the radius of the ring going to zero where vacuum (= darkness) is. The formula for the Sauron state as a superposition of coherent states on a ring is given in https://arxiv.org/abs/2305.17099: .. math:: |text{Sauron}(n)rangle = frac{1}{mathcal{N}}sum_{k=0}^{n} e^{i 2pi k/(n+1)} |epsilon e^{2pi k/(n+1)}rangle_c, :type modes: Sequence[int] :param modes: The modes of the Sauron state. :type n: int :param n: The Fock state that is approximated. :type epsilon: float :param epsilon: The radius of the ring of coherent states, default is 0.1.
SqueezedVacuum(modes[, r, phi, r_trainable, ...])	The N-mode squeezed vacuum state.
State([representation, name])	Base class for all states.
Thermal(modes[, nbar, nbar_trainable, ...])	The N-mode thermal state.
TwoModeSqueezedVacuum(modes[, r, phi, ...])	The two-mode squeezed vacuum state.
Vacuum(modes)	The N-mode vacuum state in Bargmann representation.

Class Inheritance Diagram

code/lab_dev/states

 

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