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SUMMARY:Sir Martin Wood Prize Lecture "Measurement and Control of the Phas
 e of an Electron Wave" - Dr Michihisa Yamamoto\, Associate Professor\, Qua
 ntum-Phase Electronics Centre\, The University of Yokyo
DTSTART:20180530T130000Z
DTEND:20180530T140000Z
UID:TALK104314@talks.cam.ac.uk
CONTACT:Leona Hope-Coles
DESCRIPTION:The phase of a wave function is the most fundamental concept o
 f quantum mechanics .Using electron electron wave interferometers\, numero
 us numerous attempts have been made to measure and control the phase shift
  of an electron wave. Despite the apparent simplicity\, however\, no relia
 ble phase measurement had been realized because multiple-path interference
  usually masks the unambiguous information of the phase. In this talk\, I 
 present a pure two-path interference that is realized by combining an Ahar
 onov-Bohm ring with parallel tunnel-coupled quantum wires\, where the phas
 e shift can be measured and electrically controlled. We also embedded a qu
 antum dot into one of the two paths to measure the scattering phase throug
 h an artificial atom. We have revealed influences of the parity of orbital
  wave function in the quantum dot and the interaction between a local spin
  confined in the quantum dot and conducting electrons in the reservoirs\, 
 i.e.the Kondo effect.
LOCATION:Cavendish Laboratory\, Pippard Lecture Theatre
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