Universal quantum control of an atomic spin qubit on a surface
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 util...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2023-05-01
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| Series: | npj Quantum Information |
| Online Access: | https://doi.org/10.1038/s41534-023-00716-6 |
| _version_ | 1797822713756123136 |
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| author | Yu Wang Masahiro Haze Hong T. Bui We-hyo Soe Herve Aubin Arzhang Ardavan Andreas J. Heinrich Soo-hyon Phark |
| author_facet | Yu Wang Masahiro Haze Hong T. Bui We-hyo Soe Herve Aubin Arzhang Ardavan Andreas J. Heinrich Soo-hyon Phark |
| author_sort | Yu Wang |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-03-13T10:13:12Z |
| format | Article |
| id | doaj.art-0e959395a93a4b40b1d415bed70abc9f |
| institution | Directory Open Access Journal |
| issn | 2056-6387 |
| language | English |
| last_indexed | 2024-03-13T10:13:12Z |
| publishDate | 2023-05-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | npj Quantum Information |
| spelling | doaj.art-0e959395a93a4b40b1d415bed70abc9f2023-05-21T11:22:42ZengNature Portfolionpj Quantum Information2056-63872023-05-01911610.1038/s41534-023-00716-6Universal quantum control of an atomic spin qubit on a surfaceYu Wang0Masahiro Haze1Hong T. Bui2We-hyo Soe3Herve Aubin4Arzhang Ardavan5Andreas J. Heinrich6Soo-hyon Phark7Center for Quantum Nanoscience, Institute for Basic Science (IBS)Center for Quantum Nanoscience, Institute for Basic Science (IBS)Center for Quantum Nanoscience, Institute for Basic Science (IBS)Center for Quantum Nanoscience, Institute for Basic Science (IBS)Centre de Nanosciences et de Nanotechnologies, CNRS, University Paris-Sud, Universités Paris-Saclay, C2NCAESR, Clarendon Laboratory, Department of Physics, University of OxfordCenter for Quantum Nanoscience, Institute for Basic Science (IBS)Center for Quantum Nanoscience, Institute for Basic Science (IBS)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.https://doi.org/10.1038/s41534-023-00716-6 |
| spellingShingle | Yu Wang Masahiro Haze Hong T. Bui We-hyo Soe Herve Aubin Arzhang Ardavan Andreas J. Heinrich Soo-hyon Phark Universal quantum control of an atomic spin qubit on a surface npj Quantum Information |
| title | Universal quantum control of an atomic spin qubit on a surface |
| title_full | Universal quantum control of an atomic spin qubit on a surface |
| title_fullStr | Universal quantum control of an atomic spin qubit on a surface |
| title_full_unstemmed | Universal quantum control of an atomic spin qubit on a surface |
| title_short | Universal quantum control of an atomic spin qubit on a surface |
| title_sort | universal quantum control of an atomic spin qubit on a surface |
| url | https://doi.org/10.1038/s41534-023-00716-6 |
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