[UCI-CalIT2] Quantum computing seminar February 24

Stuart A ROSS STUROSS@uci.edu
Tue, 18 Feb 2003 13:29:18 -0800


Molecular Nanotechnology and Quantum Information Science
A Lecture Series Sponsored by Cal-(IT)2:  The California Institute for
Telecommunications and Information Technology


"Continuous Quantum Measurement of Single Solid-State Qubits"


BY:
Dr. Alexander N. Korotkov
Associate Professor of Electrical Engineering 
University of California, Riverside


Monday, February 24, at 4:00 PM
McDonnell Douglas Auditorium
Refreshments will be served at 3:45 PM

ABSTRACT:  We discuss a recently developed formalism which describes the
quantum evolution of a solid-state qubit due to its continuous measurement
by a detector (in particular, single-electron transistor, quantum point
contact, or SQUID).  In contrast to the conventional ensemble-averaged
formalism, it takes into account the measurement record and therefore is
able to consider individual realizations of the measurement process.  The
formalism provides testable experimental predictions and can be used for the
analysis of a quantum feedback control of solid-state qubits.  In
particular, the quantum feedback can suppress the qubit decoherence and be
used for qubit initialization in a solid-state quantum computer.  We will
also discuss how to entangle qubits simply by measuring them with a
detector. 


SPEAKER:  Dr. Korotkov's research interests include single-electronics,
transport in semiconductor heterostructures, noise analysis, and quantum
measurements for quantum computing.  He is an author/coauthor of 70 papers,
which have been cited over 1,000 times.  He received his Ph.D. in Physics
from Moscow State University in 1991.  Prior to joining UC Riverside in
2000, he worked at Moscow State University and at SUNY, Stony Brook, and
also held visiting positions in France and Japan.  At present he is an
Associate Professor of Electrical Engineering at UC Riverside.


Faculty Host:  Peter Burke, Electrical Engineering and Computer Science