Optically Driven Quantum Dot Electrons for Quantum Computing Observation of the Autler-Townes Splitting of the Exciton transition in a Quantum Dot - PowerPoint PPT Presentation

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Optically Driven Quantum Dot Electrons for Quantum Computing Observation of the Autler-Townes Splitting of the Exciton transition in a Quantum Dot

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Title: Optically Driven Quantum Dot Electrons for Quantum Computing Observation of the Autler-Townes Splitting of the Exciton transition in a Quantum Dot


1
Optically Driven Quantum Dot Electrons for
Quantum Computing Observation of the
Autler-Townes Splitting of the Exciton transition
in a Quantum Dot
Xiaodong Xu, Luming Duan, Lu Sham, D.G. Steel
University of Michigan, UC-SD
For quantum information storage, it is essential
to be able to control the state of a qubit.
Changing the state from a 0 (spin down) to a 1
(spin up) amounts to a Rabi oscillation in the
time domain. In the frequency domain, this is
observed as a splitting of the atomic transition
by an amount determined by the Rabi frequency.
Linear absorption of the Zeeman split transition
Absorption (a.u)
Aulter Townes Splitting of the ground state
Probe (GHz)
Driving an electronic transition on resonance
with a strong optical field leads to a splitting
of the energy levels. We probe this with a weak
field coupling between a split ground state (the
Autler-Townes splitting) and a third state not
coupled to by the strong field.
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