4 papers
Trading modes against energy
Lukas Brenner, Beatriz Dias, Robert Koenig
We ask how much energy is required to weakly simulate an -qubit quantum circuit (i.e., produce samples from its output distribution) by a unitary circuit in a hybrid qubit-oscil…
Qubit-oscillator-based gate implementations for approximate Gottesman-Kitaev-Preskill codes
Lukas Brenner, Beatriz Dias, Robert Koenig
We consider hybrid qubit-oscillator systems together with Gaussian, multi-qubit as well as qubit-controlled Gaussian unitaries. We propose implementations of logical gates for appr…
Composable logical gate error in approximate quantum error correction: reexamining gate implementations in Gottesman-Kitaev-Preskill codes
Lukas Brenner, Beatriz Dias, Robert Koenig
Quantifying the accuracy of logical gates is paramount in approximate error correction, where perfect implementations are often unachievable with the available set of physical oper…
On the sampling complexity of coherent superpositions
Beatriz Dias, Robert Koenig
We consider the problem of sampling from the distribution of measurement outcomes when applying a POVM to a superposition of pure…