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SUMMARY:Nuclear spin effects in optically pumped quantum dots - Dr Alexand
 er Tartakovskii (Sheffield University)
DTSTART:20090209T153000Z
DTEND:20090209T170000Z
UID:TALK15749@talks.cam.ac.uk
CONTACT:6270
DESCRIPTION:The nature of the nano-scale environment presents a major chal
 lenge for solid-state implementation of spin-based qubits. In III-V semico
 nductors favored for fabrication of high quality electrically and opticall
 y \ncontrolled nano-structures\, a few nano-meter sized quantum dot contai
 ns up to 100000 nuclear spins producing a fluctuating magnetic field felt 
 by the \nspin of the trapped electron. I will present most recent results 
 on nuclear spin phenomena in several most promising types of III-V quantum
  dots \nincluding self-assembled (InGaAs/GaAs and InP/GaInP) and interface
  (GaAs/AlGaAs) nano-structures. Dynamics of the nuclear spin observed in t
 ime-resolved experiments on individual dots enables insight into the \npro
 perties of a few thousand nuclear ensemble interacting with a single elect
 ron. We explore an extremely wide variety of time constants ranging \nfrom
  several nanoseconds up to a few hours in the dynamics of the composite el
 ectron-nuclear spin nano-system.\n
LOCATION:HEP Seminar Room (980) Rutherford Building\, Cavendish Laboratory
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