Corrigendum: Coherent creation and destruction of orbital wavepackets in Si:P with electrical and optical read-out
2017
The ability to control dynamics of quantum states by optical interference, and subsequent
electrical read-out, is crucial for solid state quantum technologies. Ramsey interference has
been successfully observed for spins in silicon and nitrogen vacancy centres in diamond, and
for orbital motion in InAs quantum dots. Here we demonstrate terahertz optical excitation,
manipulation and destruction via Ramsey interference of orbital wavepackets in Si:P with
electrical read-out. We show milliradian control over the wavefunction phase for the two-level
system formed by the 1s and 2p states. The results have been verified by all-optical echo
detection methods, sensitive only to coherent excitations in the sample. The experiments
open a route to exploitation of donors in silicon for atom trap physics, with concomitant
potential for quantum computing schemes, which rely on orbital superpositions to, for
example, gate the magnetic exchange interactions between impurities.
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