Mirdit Doda

High-dimensional entanglement promises to increase the information capacity of photons and isnow routinely generated exploiting spatio-temporal degrees of freedom of single photons. A curiousfeature of these systems is the possibility to certify entanglement despite strong noise in the data.We show that it is also possible to exploit this noisy entanglement by introducing a protocol thatuses mutliple subspaces of the high-dimensional system simultaneously. Our protocol can be used toincrease key rates in realistic conditions. To that end, we conduct two simulations of our protocol fornoise models that apply to the two most commonly used sources of high-dimensional entanglement:time-bins and spatial modes.