Session T29: Focus Session: Semiconductor Qubits - Coherent Control, Decoherence, and Relaxation
2:30 PM–5:30 PM, Wednesday, February 29, 2012
Room: 259A
Sponsoring Unit:
GQI
Chair: Charles Tahan, Laboratory for Physical Sciences
Abstract ID: BAPS.2012.MAR.T29.7
Abstract: T29.00007 : A fast ``hybrid'' silicon double quantum dot qubit
4:06 PM–4:18 PM
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Abstract 
Authors:
Teck Seng Koh
(University of Wisconsin-Madison)
Zhan Shi
(University of Wisconsin-Madison)
C.B. Simmons
(University of Wisconsin-Madison)
J.R. Prance
(University of Wisconsin-Madison)
John King Gamble
(University of Wisconsin-Madison)
Yun-Pil Shim
(University of Wisconsin-Madison)
Xuedong Hu
(University at Buffalo, SUNY)
D.E. Savage
(University of Wisconsin-Madison)
M.G. Lagally
(University of Wisconsin-Madison)
M.A. Eriksson
(University of Wisconsin-Madison)
Mark Friesen
(University of Wisconsin-Madison)
S.N. Coppersmith
(University of Wisconsin-Madison)
We propose a quantum dot qubit architecture that has an attractive combination of speed and fabrication simplicity. It consists of a double quantum dot with one electron in one dot and two electrons in the other. The qubit itself is a set of two states with total spin quantum numbers $S^2$ = 3/4 (S = 1/2) and $S_z$ = -1/2, with the two different states being singlet and triplet in the doubly occupied dot. The architecture is relatively simple to fabricate, a universal set of fast operations can be implemented electrically, and the system has potentially long decoherence times. These are all extremely attractive properties for use in quantum information processing devices.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2012.MAR.T29.7