Superconducting boron doped diamond as a platform for all diamond quantum information technology

Quantum information technology is currently experiencing a surge of interest, particularly in the field of superconducting qubit design and fabrication. Although semiconducting diamond has found application in micro-electronics and radiation detectors, diamond based superconducting electronics has only recently been realized thanks to developments in fabricating and patterning of diamond films. Following our investigation on the unconventional quantum transport in heavily boron doped diamond films, a few key features such as re-entrant effects, magnetoresistance oscillations as well as anisotropic magnetoresistance have been identified as signatures of non s-wave order parameter and may be of interest for developing novel qubits. We pay particular attention to superconducting coplanar resonators which are necessary for the manipulation and readout of qubit states in Transmon technologies and thus the high frequency response of the superconducting diamond as a potential material for such application is investigated.

Biography:

Somnath Bhattacharyya is a Professor in the School of Physics at the University of the Witwatersrand, Johannesburg, South Africa whose research is focused on the area of condensed matter physics and nano-electronics. In 1997 Somnath Bhattacharyya completed his doctoral degree from the Indian Institute of Science, Bangalore in Condensed Matter Physics. He worked as a researcher in the USA, Germany and England. His major interest is in the transport properties of carbon and major achievements include the demonstration of resonant tunnel devices based on amorphous carbon, gigahertz transport in carbon devices, n-type doping of nanocrystalline diamond and developing theoretical models for transport in disordered carbon. In 2007 he established his new research group the “Nano-scale Transport Physics Laboratory” at the University of the Witwatersrand, Johannesburg in South Africa. His team focuses on the fabrication of the nanoelectronic devices, studying novel electronic properties of nanocrystalline diamond films and carbon superlattice structures at high magnetic fields and high frequencies. His group is also involved in performing theoretical modeling of carbon quantum structures. Prof. Bhattacharyya has published four book chapters and about seventy papers in peer reviewed journals. At present Prof. Bhattacharyya is engaged in developing a new infrastructure for a wider range of nanotechnology that will include quantum bits, quantum matter, carbon based microwave detectors, and also nano-bio-electronics.