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Title [sv]
Valley-Spin Qubits i Enkristallin Diamant
Title [en]
Valley-Spin Qubits in Single-Crystalline Diamond
Abstract [en]
The goal of this project is to demonstrate spin- and valley-polarized states in the conduction band of ultra-pure single-crystalline diamond. These states could act as flying qubits and mediate well-defined spin states between different color centers in diamond, thereby producing entangled quantum states.  Nitrogen-vacancy (N-V) centers and a few other color centers in diamond can be individually prepared in well-defined spin states with long coherence times by combined optical and microwave excitation. We intend to utilize such centers to produce combined spin- and valley-polarized states in the conduction band of diamond that can be manipulated electrically due to the different transport properties of different conduction band valleys. This has never been attempted before. Our group has made a major breakthrough by generating valley-polarized states in diamond with record lifetimes and, by demonstrating valley-polarized currents (Published in Nature Materials). We have also very recently demonstrated a valley transistor exhibiting all-electric control of valley polarization, for the first time ever (under review in Nature Materials).  We are now in a unique position to extend these findings and use them also for the manipulation of spin states. Our ultimate goal is to demonstrate information processing devices and qubits with an excellent potential to become the enabling technology for future scalable quantum computers.
Principal InvestigatorIsberg, Jan
Coordinating organisation
Uppsala University
Funder
Period
2019-01-01 － 2022-12-31
National Category
Atom and Molecular Physics and OpticsCondensed Matter Physics
Identifiers
DiVA, id: project:6184Project, id: 2018-04154_VR

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Atom and Molecular Physics and OpticsCondensed Matter Physics

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