Optimization of spin readout fidelity by counting statistics in a phosphorus donor device

Speaker: 
Dr Yu He
From: 
CQC2T at UNSW
When: 
4pm Thursday 10 August 2017
Where: 
CQC2T Conference Room, Level 2, Newton Building J12, UNSW Kensington Campus

We investigate spin and charge dynamics of a quantum dot of phosphorus atoms coupled to a radio-frequency single-electron transistor (rf-SET) using full counting statistics and inverse counting statistics.
We show how the magnetic field plays a role in determining the bunching or anti-bunching tunnelling statistics of the donor dot and SET system. Using the counting statistics we show how to determine the lowest magnetic field where spin-readout is possible. We then show how such a measurement can be used
to investigate and optimise single electron spin-readout fidelity.