A quantum dot single spin meter

Details A quantum dot single spin meter A quantum dot single spin meter

Apr 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009njph...11d3031w&link_type=abstract

New Journal of Physics, Volume 11, Issue 4, pp. 043031 (2009).

Physics

6

Scientific paper

We present the theory of a single spin meter consisting of a quantum dot in a magnetic field under microwave irradiation combined with a charge counter. We show that when a current is passed through the dot, a change in the average occupation number occurs if the microwaves are resonant with the on-dot Zeeman splitting. The width of the resonant change is given by the microwave-induced Rabi frequency, making the quantum dot a sensitive probe of the local magnetic field and enabling the detection of the state of a nearby spin. If the dot-spin and the nearby spin have different g-factors, a non-demolition readout of the spin state can be achieved. The conditions for a reliable spin readout are found.

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