Optical preparation of nuclear spin bath for enhancing single electron spin coherence time in a quantum dot


Grant Data
Project Title
Optical preparation of nuclear spin bath for enhancing single electron spin coherence time in a quantum dot
Duration
36
Start Date
2009-09-18
Completion Date
2012-09-17
Amount
923352
Conference Title
Presentation Title
Keywords
electron spin in quantum dot, inhomogeneous broadening, nuclear state preparation, optical control in quantum dot
Discipline
Physics,Materials Sciences
Panel
Physical Sciences (P)
Sponsor
RGC General Research Fund (GRF)
HKU Project Code
HKU 706309P
Grant Type
General Research Fund (GRF)
Funding Year
2009/2010
Status
Completed
Objectives
1) Investigate the possible actions on the nuclear spin bath when the electronic states in a semiconductor quantum dot is excited and manipulated by optical fields. Find a unified treatment of the coupled interplay between the nuclear spin bath, the electronic states, and the optical fields. 2) Investigate the hyperfine interaction between the nuclear spin and the heavy-hole constitution of the charged exciton state in the relevant quantum dot geometries and experimental setups. Understand the possible actions on nuclear spin baths from hole spin, and explore the potential of this new ingredient on nuclear spin control. 3) Explore control schemes that can prepare the nuclear spin bath from the initial thermal distribution into a non-thermal distribution with narrowed inhomogeneous broadening, for enhancing the electron spin coherence time in semiconductor quantum dot.
All Publications
TitleAuthor(s)Issue DateViews
 
Many-body singlets by dynamic spin polarization
Journal:Physical Review B - Condensed Matter and Materials Physics
2011
655
 
2010
505