Coherent superpositions of three states for phosphorous donors in silicon prepared using THz radiation.

Coherent superpositions of three states for phosphorous donors in silicon prepared using THz radiation.
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DOI:
10.1038/ncomms16038
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发表时间:
2017-07-24
影响因子:
16.6
通讯作者:
Murdin BN
Murdin BN
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Chick S;Stavrias N;Saeedi K;Redlich B;Greenland PT;Matmon G;Naftaly M;Pidgeon CR;Aeppli G;Murdin BN

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Superposition of orbital eigenstates is crucial to quantum technology utilizing atoms, such as atomic clocks and quantum computers, and control over the interaction between atoms and their neighbours is an essential ingredient for both gating and readout. The simplest coherent wavefunction control uses a two-eigenstate admixture, but more control over the spatial distribution of the wavefunction can be obtained by increasing the number of states in the wavepacket. Here we demonstrate THz laser pulse control of Si:P orbitals using multiple orbital state admixtures, observing beat patterns produced by Zeeman splitting. The beats are an observable signature of the ability to control the path of the electron, which implies we can now control the strength and duration of the interaction of the atom with different neighbours. This could simplify surface code networks which require spatially controlled interaction between atoms, and we propose an architecture that might take advantage of this. Control of the interaction between atoms and their neighbours is important to quantum information processing and has been studied using two states. Here the authors demonstrate a more flexible control using a three-state superposition of donors in silicon using THz quantum beat spectroscopy.
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