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SUMMARY:Single electron pumping: Current accounting and electron partition
 ing - Dr Frank Hohls\, Physikalisch-Technische Bundesanstalt (PTB)\, Germa
 ny
DTSTART:20140428T131500Z
DTEND:20140428T141500Z
UID:TALK52313@talks.cam.ac.uk
CONTACT:Teri Bartlett
DESCRIPTION:Pumping transport mechanisms have attracted much interest as a
 n alternative means to generate a directed current independent of a bias v
 oltage. The current results from periodic modulation of certain system par
 ameters of a nanostructure connected to source and drain leads. Of particu
 lar interest is the quantized regime where exactly one or two electrons ar
 e emitted in each period. Dynamic semiconductor quantum dots with tunable 
 barriers are among the most promising candidates: On the one hand they can
  produce quantized charge currents even at GHz driving frequency which is 
 of great interest for electrical metrology. On the other hand they can be 
 integrated with one dimensional ballistic conductors formed at the edge of
  a quantum Hall system\, opening the route to electron optics experiments.
  In this talk I will present different experiments touching both aspects: 
 Concerning metrology I will show how electron counting techniques can be u
 sed not only to characterize the quantized electron pumps but also to corr
 ect errors related to the statistical properties of the single electron so
 urce. Towards electron quantum optics and quantum information applications
  I will present the results of a Hanbury Brown Twiss type correlation expe
 riment for single electrons and electron pairs emitted into a one dimensio
 nal ballistic conductor and partitioned at a potential barrier.
LOCATION:Mott Seminar Room\, Cavendish Laboratory\, Department of Physics
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