[QIP-Sem] MIT QIP Special Seminar Announcement

[QIP-Sem Mailing List]

On Tuesday, April 6 from 10:00 thru 11:30 AM in the Marlar Lounge 
(37-252) there will be a special seminar of interest to the local QIP 
community:


Ion Trapology for Scalable Quantum Information Processing

by David J. Wineland (Time & Frequency Division, NIST, Boulder CO)

ABSTRACT

At NIST, by using a few trapped atomic ions, we have been able to 
implement the basic one- and two-qubit gate operations required for 
quantum information processing [1].  The challenge is to scale up 
this system in order to perform large-scale processing.  One way this 
might be accomplished is to use an array of ion trap zones, each of 
which contains a small number of ions - to facilitate efficient 
gates.  By shuttling ions between zones, gates between selected ions 
in the array could be achieved [2].  By separating ions contained in 
one trap, moving them to separate trap zones, and performing 
subsequent logic operations, we can now implement the basic steps of 
this scheme.  However, we now face significant practical problems in 
how to actually fabricate the required large trap structures, how to 
wire up the trap electrodes and control their potentials, and how to 
produce and manipulate the many laser beams that will be needed in 
such a device.  These and other issues will be discussed.

[1] "The physical implementation of quantum computation",  D. P. 
DiVincenzo, in Scalable Quantum Computers, ed. by S. L. Braunstein 
and H. K. Lo (Wiley-VCH, Berlin, 2001), pp. 1-13.
[2] "Architecture for a large-scale ion-trap quantum computer",  D. 
Kielpinski, C. Monroe, and D. J. Wineland, Nature 417, 709-711 (2002).
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