Quantum Coherence Activation By Open Systems and Environments

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With QuCABOoSE, we challenge the belief that interactions with a bath necessarily diminish quantum effects forever and, thereby, restrict the progress in the fields of quantum science and technology. Our ambitious vision is to establish open systems as systems that are, in fact, supplemented by a quantum environment, rather than being impaired through the environment, shining a new light on an untapped resource for quantum applications and their physical implementations. By considering the full quantum nature of and quantum interaction between systems and environments, we target three main objectives: O1 noise-activated quantum correlations, O2 environment-assisted quantum algorithms and O3 multiplatform noise characterization. Because of the diverse composition of the consortium and our individual expertises, we are able to tackle the aforementioned research goals from a combined theoretical-experimental perspective, without limiting us to a specific physical system. On the one hand, quantum-noise control and system-bath quantum entanglement, for example, will function as a testbed to probe the fundamental advantages of a full system-environment quantum picture, allowing us to explore how previously lost quantum features can rebound through environment backactions. On the other side of the spectrum, quantum protocols will be devised that, for example, (re-)activate quantum correlations due to the presence of and interaction with an environment. To name one application, a self-purifying quantum communication (teleportation), powered by a quantum environment, is proposed. By covering the range from fundamental to applied, the project’s findings advance our knowledge of open quantum systems as well as offer a fresh approach to quantum information science in realistic systems.