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### DDBlock

## 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.