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연구기관
기초과학연구소
Journal papers
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Universal quantum control of an atomic spin qubit on a surface
Title
Universal quantum control of an atomic spin qubit on a surface
Authors
Wang
;
Yu
;
Haze
;
Masahiro
;
Bui
;
Hong T.
;
Soe
;
We-hyo
;
Aubin
;
Herve
;
Ardavan
;
Arzhang
;
Heinrich
;
Andreas J.
;
Phark
;
Soo-hyon
Ewha Authors
박수현
;
Andreas Heinrich
SCOPUS Author ID
박수현
; Andreas Heinrich
Issue Date
2023
Journal Title
npj Quantum Information
ISSN
2056-6387
Citation
npj Quantum Information vol. 9, no. 1
Publisher
Nature Research
Indexed
SCIE; SCOPUS
Document Type
Article
Abstract
Scanning tunneling microscopy (STM) enables the bottom-up fabrication of tailored spin systems on a surface that are engineered with atomic precision. When combining STM with electron spin resonance (ESR), these single atomic and molecular spins can be controlled quantum-coherently and utilized as electron-spin qubits. Here we demonstrate universal quantum control of such a spin qubit on a surface by employing coherent control along two distinct directions, achieved with two consecutive radio-frequency (RF) pulses with a well-defined phase difference. We first show transformations of each Cartesian component of a Bloch vector on the quantization axis, followed by ESR-STM detection. Then we demonstrate the ability to generate an arbitrary superposition state of a single spin qubit by using two-axis control schemes, in which experimental data show excellent agreement with simulations. Finally, we present an implementation of two-axis control in dynamical decoupling. Our work extends the scope of STM-based pulsed ESR, highlighting the potential of this technique for quantum gate operations of electron-spin qubits on a surface. © 2023, The Author(s).
DOI
10.1038/s41534-023-00716-6
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