5 papers
Direct access to the initial polarization of nuclei by measuring coherence evolution of an nitrogen-vacancy center spin qubit
Mateusz Kuniej, Katarzyna Roszak
We introduce a method for the measurement of the lower bound on the initial polarization of spinful nuclei in a diamond by following the coherence evolution of an NV center spin qu…
Learning Volterra Memory Kernels for Non-Markovian Qubit Dynamics
Jimmie Adriazola, Katarzyna Roszak
We develop a data-driven framework for identifying non-Markovian equations of motion for open quantum systems, demonstrated here for qubit-environment dynamics. Starting from the N…
Generation of C-band entangled photon pairs by biexciton-exciton cascade from symmetric InAs/InP quantum dots
Anna MusiaÅ, Maja Wasiluk, Katarzyna Roszak +6
Hereby, we study the generation of pairs of polarization-entangled photons at telecom C-band by biexciton-exciton cascade from non-resonantly excited epitaxial InAs/InP quantum dot…
Estimation of nuclear polarization via discrete measurement of NV center spin evolution
Mateusz Kuniej, Katarzyna Roszak
We propose a method for the estimation of the initial polarization of spinful nuclei of the 13 C isotope in diamond via a measurement of the evolution of the coherence of an NV cen…
A Non-Convex Optimization Strategy for Computing Convex-Roof Entanglement
Jimmie Adriazola, Katarzyna Roszak
We develop a numerical methodology for the computation of entanglement measures for mixed quantum states. Using the well-known Schrödinger-HJW theorem, the computation of convex r…