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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-2238
DTSTART:20111202T213000Z
DURATION:PT1H0M0S
DTSTAMP:20260422T090229Z
LAST-MODIFIED:20111128T222842Z
LOCATION:2241 Chamberlin Hall (coffee at 4:30 pm)
SUMMARY:Strong-Arming Electron Spin Dynamics\, Physics Department Coll
 oquium\, Jason Petta\, Princeton University
DESCRIPTION:Over ten years ago\, Daniel Loss and David DiVincenzo prop
 osed using the spin of a single electron as a quantum bit. At the time
  of the proposal\, it was not possible to trap a single electron in a 
 device and measure its spin\, let alone demonstrate control of quantum
  coherence. In this talk I will describe recent progress in the field\
 , focusing on two new methods for single spin control that have been d
 eveloped by my group at Princeton. The first method is based on quantu
 m interference and implements spin-interferometry on a chip. The secon
 d method utilizes the strong spin-orbit coupling of InAs. By shifting 
 the orbital position of the electronic wavefunction at gigahertz frequ
 encies\, we can control the orientation of a single electron spin and 
 measure the full g-tensor\, which exhibits a large anisotropy due to s
 pin-orbit interactions. Both methods for single spin control are order
 s of magnitude faster than conventional electron spin resonance and al
 low investigations of single spin coherence in the presence of fluctua
 ting nuclear and spin-orbit fields.
URL:https://www.physics.wisc.edu/events/?id=2238
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