katch wreckhttps://www.nature.com/articles/s41566-023-01190-4
"Here we provide an exact calculation of the quantum, private, two-way assisted quantum and secret-key-agreement capacities of all bosonic dephasing channels. We prove that they are equal to the relative entropy of the distribution underlying the channel with respect to the uniform distribution, solving a problem that was originally posed over a decade ago."
#quantumComputing #phaseNoise #bosoonicDephasing #information
Exact solution for the quantum and private capacities of bosonic dephasing channels - Nature Photonics
An exact solution for the quantum and private capacities of bosonic dephasing channels is provided. The authors prove that these capacities are equal to the relative entropy of the distribution underlying the channel with respect to the uniform distribution.