GaussianBosonSamplingMPS.jl

This is the documentation for the GaussianBosonSamplingMPS.jl package.

This package implements the tensor-network-based algorithm for simulating Gaussian boson sampling experiments proposed in [1], and of the algorithm in [2] for computing elements of Gaussian operations in the Fock number basis.

The functions for computing hafnians and loop hafnians of square matrices are ported from The Walrus [3].

Package features

• Simulate a linear optical quantum computer with matrix-product states (MPS) through the application of common operations such as one- and two-mode squeezing, beam splitters, etc. and also simulate losses through an attenuator channel.
• Manipulate MPS (and sample from them) representing mixed states in the superboson formalism [4].
• Find an approximate MPS representation of a Gaussian state in the Fock basis.
• Sample from the outcome of a lossy Gaussian boson sampling experiment with the classical MPS-based algorithm described in [1].

Bibliography