ELFT HÍRADÓ

[Szeminárium koordinátor <szfi-seminar AT wigner.mta.hu>]

SZFI Szeminárium
Beke Dávid
(Wigner FK SZFI)
Room-temperature defect qubits in ultrasmall silicon carbide nanocrystals
There is an urgent quest for room temperature qubits in nanometer-sized, 
ultrasmall nanocrystals for quantum sensing, hyperpolarization of 
biomolecules, and quantum information processing. Although the preparation of 
ultrasmall nanoparticles hosting stable qubits is appealing, the creation of 
such systems is remaining a challenge. The lack of a suitable synthesis 
technique may be related, besides surface and crystal reconstruction, to the 
mechanism of qubit formation in nanoparticles below 10 nm. Qubits in small 
nanoparticles are often created by irradiation techniques and subsequent 
annealing, and then they are milled or laser-ablated into smaller crystals. 
The yield of the vacancies in these nanocrystals below 10 nm falls on the ppm 
level in most of the time. We developed a chemical synthesis method that 
avoids any invasive materials fabrication processes and interaction of the 
solid with high-energy particle by using self-propagated high-temperature 
synthesis with subsequent electrochemical method, the no-photon exciton 
generation chemistry to produce room-temperature qubits in ultrasmall 
nanocrystals of sizes down to 3 nanometers with high yield. We demonstrate 
room-temperature optically detected magnetic resonance signal of divacancy 
qubits with emission wavelengths falling in the second biological window 
(1000-1380 nm).2021. március 23. kedd, 10.00
Microsoft Teams,  
https://teams.microsoft.com/l/meetup-join/19%3ace423c05cd1543ab9f9905886590ad69%40thread.tacv2/1616060313773?context=%7b%22Tid%22%3a%224d7ddeef-14ff-4911-8c11-401c69384d77%22%2c%22Oid%22%3a%22969d2d4a-5ba8-43f1-bd69-93f0998b025f%22%7d
Az előadás nyelve: magyar
Minden érdeklődőt szívesen látunk!
Juhász Róbertszfi-seminar AT wigner.mta.hu