Project group A: Field and Charge

Fields mediate the forces between charges. This fact renders fluctuations of both entities intertwined in a natural way. For example, the elementary transport of charges in confined systems is an obvious candidate to display strong non-Gaussian fluctuations. Charge tunneling is related to induced fluctuating dipoles and therefore establishes a direct link to the radiation field, thus enabling the detection of quantum fluctuations of charges in real time. In turn, the elementary dynamics of field fluctuations themselves can be manipulated by matter, thus opening up the way to address fundamentals of quantum theory also in the fourth dimension: time. We thus propose to study the interplay of charge and field fluctuations on atomic distances and on ultrafast time scales in transport and light-matter interaction.