Speaker: Seongshik Oh, NIST, Boulder
Date & Time: March 27, 2007 - 1:30pm
Location: Serin Physics 385E
Precision Material Engineering at Nanoscale: Elimination of Decoherence Sources in Superconducting QuBits
Physics and Astronomy
Seongshik Oh, NIST, Boulder
1:30pm, Serin Physics 385E
Quantum computers based on the superconducting quantum bits (qubits) are considered promising due to their scalable architecture. However, decoherence is a major obstacle, and identifying and eliminating the decoherence sources is one of the most important tasks for superconducting quantum computation. Over the past few years, we have found that the amorphous insulators commonly used within and around the superconducting qubits contain a serious decoherence source, the nanoscopic fluctuators, which significantly deteriorate coherent qubit operation. I will show how to eliminate these fluctuators by means of precision material-engineering. In addition to the results on the superconducting qubits, I will present examples of nanoscale-engineered complex oxides and show how artificial materials create new physics.