QSI Seminar: Dr Vincent Mourik, FQT | CQC2T, UNSW Sydney

A 60-year old mechanism enabling nuclear resonance using purely electric fields resurfaces enabling coherent quantum control of single nuclear spin. 

abstract bright blue light with spinning movement

'Nuclear spins are highly coherent quantum objects'. Ref: Coherent electrical control of a single high-spin nucleus in silicon. Image: WallpapersCave.

Coherent electrical control of a single high-spin nucleus in silicon 

SPEAKER: Dr Vincent Mourik

AFFILIATION: Fundamental Quantum Technologies Laboratory & Centre for Quantum Computation and Communication Technology, UNSW, Sydney

HOSTED BY: Dr JP Dehollain, UTS Centre for Quantum Software and Information

ABSTRACT: 
Nuclear electric resonance (NER) enables transitions of a high spin nucleus by modulating its electrical quadrupole interaction with an electric field. In this talk I will show how we found this effect in our single 123-Sb donor device in silicon, with a nuclear spin of size 7/2.

We demonstrate, for the first time, coherent, purely electrical control of a single high spin nucleus. I will share our theoretical understanding of the microscopic mechanism at play in our device. Finally, I will discuss future research directions exploiting this versatile system.

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