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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
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SEQUENCE:0
UID:UW-Physics-Event-1477
DTSTART:20090331T150000Z
DURATION:PT1H0M0S
DTSTAMP:20260422T181639Z
LAST-MODIFIED:20090303T182317Z
LOCATION:5310 Chamberlin
SUMMARY:Room Temperature demonstration of Quantum Cellular Automata fo
 rmed by Single Si Atom Quantum Dots\, R. G. Herb Condensed Matter Semi
 nar\, Baseer Haider\, University of Alberta
DESCRIPTION:A device architecture for computing with quantum dots\, Qu
 antum Cellular Automata\, points to a new paradigm for computation tha
 t goes beyond the conventional semiconductor technology roadmap to ach
 ieve ultra low power consumption. The Quantum Cellular Automata scheme
  is based upon "cells" of tunnel coupled quantum dots and electrostati
 c interaction between adjacent cells to transmit binary information an
 d perform computations. Efforts to fabricate Quantum Cellular Automata
  devices have so far been limited by the need for extreme cryogenic co
 nditions and by the debilitating effects of stray charges. It is conce
 ivable that fabrication on a smaller scale can circumvent these limita
 tions. Here we demonstrate that single atoms in a solid state environm
 ent can serve as quantum dots and that such quantum dots can be contro
 llably tunnel coupled to embody the building block of a Quantum Cellul
 ar Automata Cells. Such cells exhibit "selfbiasing" effect\, that is\,
  the electron occupation is set by cell geometry. The binary state of 
 the cell may be controlled electrostatically. This cell operates at ro
 om temperature and is largely immune to stray charges that are more th
 an 30 Angstroms away from the cell.
URL:https://www.physics.wisc.edu/events/?id=1477
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