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[Fizinfo] BME Elm. Fiz. Szeminárium, okt. 7., György Zoltán

From: Janos Asboth <asboth.janos AT ttk.bme.hu>
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Subject: [Fizinfo] BME Elm. Fiz. Szeminárium, okt. 7., György Zoltán
Date: Wed, 5 Oct 2022 15:22:45 +0200
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Meghívó

BME Elméleti Fizika Szeminárium,

okt. 7. péntek 10h15,

1111 Budapest, Budafoki út 8., BME F III. magasföldszint 01.,
Elméleti Fizika Tanszék szemináriumi szoba

György Zoltán (ELTE fizikushallgató):
Electrically driven spin resonance with bichromatic driving

The spin degree of freedom of an electron confined in a quantum dot
naturally defines a qubit. Spin qubits in semiconductors, such as silicon
or germanium, are promising candidates for the building block of a future
scalable fault-tolerant quantum computer. Electrically driven spin
resonance (EDSR) is an established tool for controlling semiconductor spin
qubits. In our work [1] we theoretically study a frequency-mixing variant
of EDSR, where two driving tones with different drive frequencies are
applied, and the resonance condition connects the spin Larmor frequency
with the sum of the two drive frequencies. Focusing on flopping-mode
operation of a single electron in a double quantum dot with spin-orbit
interaction, we calculate the parameter dependence of the Rabi frequency
and the Bloch-Siegert shift. A shared-control spin qubit architecture could
benefit from this bichromatic EDSR scheme, as it enables simultaneous
single-qubit gates.

[1] - György, Z., Pályi, A., & Széchenyi, G. (2022). Electrically driven
spin resonance with bichromatic driving. arXiv preprint arXiv:2206.00399.

Minden érdeklődőt szeretettel várunk.
Asbóth János,
szemináriumi koordinátor

[Fizinfo] BME Elm. Fiz. Szeminárium, okt. 7., György Zoltán, Janos Asboth, 10/05/2022