[QIP-Sem] Special MIT Quantum Information Processing Seminar Announcement

[QIP-Sem Mailing List]

There will be a Physical Mathematics Seminar next week on Tuesday, 
November 30 at 14:30 in MIT room 2-338, which should be of interest 
to the subscribers of this QIP-Sem mailman list:


Design and Optimization of a Solid State Qubit System

by Russel Caflisch (Dept. of Mathematics, UCLA)

ABSTRACT

This talk will describe the simulation, design and optimization of a 
qubit for use in quantum communication or quantum computation. The 
qubit is realized as the spin of a single trapped electron in a 
semi-conductor quantum dot. The quantum dot and a quantum wire are 
formed by the combination of quantum wells and gates. The design goal 
for this system is a "double pinchoff", in which there is a single 
trapped electron in the dot and a single (or small number of) 
conduction states in the wire. Because of considerable experimental 
uncertainty in the system parameters, the optimal design should be 
"robust", in the sense that it is far away from unsuccessful designs. 
We use a Poisson-Schrodinger model for the electrostatic potential 
and electron wave function and a semi-analytic solution of this 
model. Through a Monte Carlo search, aided by an analysis of singular 
points on the design boundary, we find successful designs and 
optimize them to achieve maximal robustness.


On Monday, November 29 at 16:00 hours in room 4-237, the regular MIT 
QIP seminar will feature Prof. Rainer Blatt from the Univ. of 
Innsbruck, who will speak on Ion Trap Quantum Computing (abstract to 
follow shortly).
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