BECAS
RUS MarÍa EstefanÍa
artículos
Título:
Efficient electron transfer in quantum dot chains controlled by a cubic detuning profile via shortcuts to adiabaticity
Autor/es:
RUS, MARÍA E.; ROMERO, RODOLFO H.; GOMEZ, SERGIO S.
Revista:
EUROPHYSICS LETTERS
Editorial:
EPL ASSOCIATION
Referencias:
Año: 2022 vol. 140
ISSN:
0295-5075
Resumen:
Long-distance fast and precise transfer of charge in semiconductor nanostructures is one of the goals for scalable electronic devices. We study theoretically the control of shuttling of an electron along a linear chain of semiconductor electrostatically defined quantum dots by an electric field pulse with nonlinear time-dependent profile. We show that this essential nonlinearity along with shortcuts to adiabaticity techniques speed up the electron transfer with high fidelity, while still holding great robustness under spin-flip interactions and inhomogeneities in the couplings of the chain. A given fidelity can be set experimentally by controlling the maximum sweep energy and duration of the control pulse.