Quantum deconvolution

Understand

We propose a method for stably removing noise from measurements of a quantum many-body system.

• The question is cast to a linear inverse problem by using a quantum Fischer information metric as figure of merit.
• This requires the ability to compute the adjoint of the noise channel with respect to the metric, which can be done analytically when the metric is evaluated at a Gaussian (quasi-free) state.
• This approach can be applied effectively to n-point functions of a quantum field theory.