DIMACS Theoretical Computer Science Seminar

Title: Toward scalable superconducting qubits

Speaker: Lara Faoro, Rutgers University

Date: Wednesday, April 11, 2007 11:00am - 12:00pm

Location: CoRE Bldg, CoRE A, Room 301, Rutgers University, Busch Campus, Piscataway, NJ


Small superconducing circuits containing Josephson junctions have received a great deal of attention recently as promising candidates for the scalable quantum bit (qubit) implementation. Despite and astounding recent progress, in both the experimental and theory of these devices, decoherence still severely limits their performances. In fact, no existing circuits displays decoherence time sufficiently long to make possible quantum computation. A major challenge for the realization of a quantum computer based on superconducting devices is how to reduce the noise and how to limit its dephasing effects on the superposition of the logical quantum states of the quantum computer.

In this talk, first I will review different types of superconducting qubits (charge, flux and phase) that are currently realized in the laboratories. Then I will describe the major sources of noise afflicting these devices and discuss the proper phenomenological models to treat them.