KDO Research Group

Superconducting Quantum Computing and Low Temperature Physics

A new device, the Josephson junction defect spectrometer, strongly couples to and studies individual defects in an experiment that is comparable to atoms in a cavity or cavity QED. In this case, the cavity is a tunable resonator which strongly couples to defects.

By cooling circuits 10,000 times closer to absolute zero than room temperature, entire circuits enter quantum mechanical states where quantized energy levels dictate properties, analogous to those of an atom. Similar to atomic wavefunctions centered on an atomic nucleus, those of the superconducting circuit are centered around its circuit elements. Two different state wavefunctions create quantum bits, or qubits, which are studied as elements of a quantum computer. In this group we study these devices and physical phenomena which can improve them.