Dátum

Előadó: Boross Péter (ELTE TTK, Anyagfizikai Tanszék)

Előadás címe: "Electric control of dopant nuclear spins in semiconductors"

Időpont: 2017. szeptember 12.  kedd de. 10:00 óra

Helyszín: MTA Wigner FK I.ép. Tanácsterem

 

Kivonat:

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 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