Quantum entanglement with ultrashort charge wavepackets

A significant challenge in quantum nanoelectronics is accessing the internal characteristic timescales, typically a few picoseconds, that dictate the quantum dynamics of nanoelectronic quantum devices. These timescales are currently beyond our reach. If achieved, this will open new path for studying the dynamic aspects of quantum mechanics. ULTRAWAVE will overcome this challenge by leveraging advances in THz photon production and utilizing innovative photon-to-electron conversion devices to engineer THz electronic charge pulses for use in quantum nanoelectronics. We will integrate highly efficient photoconductive switches on-chip within a very low-temperature setup creating the first platform that merges time-resolved THz physics with milli Kelvin temperature. This breakthrough will enable us to achieve unprecedented time scales, granting access to the quantum regime of nanoelectronic conductors.We will develop a new quantum material platform for quantum nanoelectronics based on germanium heterostructures to elevate the field to unprecedented levels. The recently demonstrated exceptional quantum coherence properties of this material will enable us to develop the long-thought single-charge detector for propagating wave packets.Overall, ULTRAWAVE will establish a novel approach for performing in-flight quantum manipulations at unprecedented timescales, resulting in a major breakthrough in the study of quantum entanglement and introducing a new type of quantum information processing with propagating quantum states. The ability to reach these unprecedented timescales will pioneer a new area of research in quantum nanoelectronics for both fundamental science and applications in quantum technology.