The NONGAUSS project focuses on the provable enhancement of scientific and innovative potential in non-Gaussian quantum physics at UP by the direct and intensive involvement of modern quantum technology. At the same time, foreign partners will provide expertise about modern quantum technology and experimental platforms being developed at DTU and SU. Both SU and DTU are involved in a more extensive network of elite EU laboratories in contemporary quantum technology. Non-Gaussian quantum physics is an advanced extension of hybrid quantum optics with non-Gaussian quantum states and measurements of light into other fields of quantum physics & technology with atoms, solid-state, and condensed-matter systems. With the help of light it is possible to operate, measure and couple quantum states of atomic, solid-state, superconducting and optomechanical oscillators at large distances. Non-Gaussian quantum states are therefore essential resources as they allow the interplay of various systems in new and exciting ways. Their capabilities are far beyond the limited set of statistical mixtures of directly accessible Gaussian states with extensive applications in quantum communication and quantum sensing.
Currently, deterministic non-Gaussian operations are under intensive investigation. They employ a new class of non-Gaussian states with reduced quantum noise in a nonlinear function of optical amplitudes. Modern quantum nanotechnology with cold atoms, solid-state systems and mechanical oscillators is the most promising candidate for the preparation of such non-Gaussian states and building the desired quantum operations, opening a space for new applications. Simultaneously, the future progress in a more scalable generation of non-Gaussian multiphoton states from solid-state systems and superconducting circuits will soon break the limit of low-photon quantum non-Gaussian states of light. Such states can be used for high-fidelity quantum measurements and operations instead of coherent and squeezed states.
Non-Gaussian quantum states of light can be used to prepare, control, couple, and measure processes in atomic, solid-state and optomechanical systems beyond the possibilities given by Gaussian states of light. Quantum non-Gaussian states can also be interconverted between different systems as shown by the recent proposal for mechanical oscillators. Gaussian squeezed states have already been used to probe and control quantum processes in atoms and solid-state systems. Non-Gaussian quantum states of light could, in principle, perform sensing, identification, interfacing, interaction, control, and communication of quantum matter processes beyond the limits of Gaussian states. This completely new non-Gaussian toolbox for the matter at the quantum level will consequently stimulate advanced applications in traditional fields of quantum technology (quantum computation, sensing, communication, simulation). But mainly it will bring new applications, possibly without any classical analogy, and heavily contribute to current disputes about revolutionary areas, such as quantum thermodynamics, quantum coherent chemistry and biology, quantum nanorobotics, quantum cybernetics, quantum machine learning, and quantum artificial intelligence. In all of these hot subjects, flexible quantum non-Gaussian states, operations and measurements are necessary.
Twinning non-Gaussian quantum physics for quantum technology focuses therefore on two major scientific topics:
Hybrid quantum non-Gaussian operations with light and atoms in nanostructures using superconducting detectors (mainly with the partner at the SU Paris);
Quantum non-Gaussian dynamics with solid-state systems and mechanical oscillators controlled by light (mainly with the partner at the DTU Lyngby).