Mark’s research involves understanding and engineering quantum coherence and correlations in carbon-based nanodevices - a novel research direction which is highly relevant to fields as diverse as quantum metrology, spintronics, and quantum information processing.
Recent work includes the demonstration of Pauli spin blockade and non-invasive charge and spin state readout of carbon nanotube quantum dots using radio frequency reflectometry. This showed that effective spin-to-charge conversion is feasible in these devices, which is of relevance for spin-based quantum information processing as spin-coherence times in carbon-12 materials are not limited by hyperfine interaction with nuclear spins.
Further work includes studies of Kondo physics in quantum dots such as the competition between Kondo and exchange correlations or, when coupled to superconducting electrodes, the interplay between superconducting and Kondo correlations. This work helps understand the electronic properties of a wide range of materials in which electron correlations play an important role.