ELFT HÍRADÓ

[Janos Asboth <asboth.janos AT wigner.mta.hu>]

Electric control of dopant nuclear spins in semiconductors

*Boross Péter*
ELTE TTK, Anyagfizikai Tanszék (vendéglátó: Asbóth János)

2017. szeptember. 12., kedd, 10.00, MTA Wigner FK SZFI, I. épület 1.
emeleti Tanácsterem
Nuclear spins of dopant atoms in semiconductors are promising candidates as
quantum bits, due to the long lifetime of their quantum states.
Conventionally, coherent control of nuclear spins is done using ac magnetic
fields. Using the example of a phosphorus atom in silicon, we theoretically
demonstrate[1] that hyperfine interaction can enhance the speed of magnetic
control. Based on that result, we show that hyperfine interaction also
provides a means to control the nuclear spin efficiently using an ac
electric field, in the presence of intrinsic or artifical spin-orbit
interaction. The electric control scheme we describe is especially fast in
a hybrid dot-donor system subject to an inhomogeneous magnetic field.

[1] P. Boross, G. Széchenyi and A. Pályi, Hyperfine-assisted fast electric
control of dopant nuclear spins in semiconductors, arXiv:1707.00581



Minden érdeklődőt szívesen látunk!

Asbóth János
szfi-seminar AT wigner.mta.hu