title: Electrically controlling single-spin qubits in a continuous microwave field.
abstract: Large-scale quantum computers must be built upon quantum bits that are both highly coherent and locally controllable. We demonstrate the quantum control of the electron and the nuclear spin of a single (31)P atom in silicon, using a continuous microwave magnetic field together with nanoscale electrostatic gates. The qubits are tuned into resonance with the microwave field by a local change in electric field, which induces a Stark shift of the qubit energies. This method, known as A-gate control, preserves the excellent coherence times and gate fidelities of isolated spins, and can be extended to arbitrarily many qubits without requiring multiple microwave sources.
authors.affiliation: Centre for Quantum Computation and Communication Technology, School of Electrical Engineering and Telecommunications, University of New South Wales, Sydney, New South Wales 2052, Australia.
authors.forename: Arne
authors.initials: A
authors.lastname: Laucht
authors.affiliation: Centre for Quantum Computation and Communication Technology, School of Electrical Engineering and Telecommunications, University of New South Wales, Sydney, New South Wales 2052, Australia.
authors.forename: Juha T
authors.initials: JT
authors.lastname: Muhonen
authors.affiliation: Centre for Quantum Computation and Communication Technology, School of Electrical Engineering and Telecommunications, University of New South Wales, Sydney, New South Wales 2052, Australia.
authors.forename: Fahd A
authors.initials: FA
authors.lastname: Mohiyaddin
authors.affiliation: Centre for Quantum Computation and Communication Technology, School of Electrical Engineering and Telecommunications, University of New South Wales, Sydney, New South Wales 2052, Australia.
authors.forename: Rachpon
authors.initials: R
authors.lastname: Kalra
authors.affiliation: Centre for Quantum Computation and Communication Technology, School of Electrical Engineering and Telecommunications, University of New South Wales, Sydney, New South Wales 2052, Australia.
authors.forename: Juan P
authors.initials: JP
authors.lastname: Dehollain
authors.affiliation: Centre for Quantum Computation and Communication Technology, School of Electrical Engineering and Telecommunications, University of New South Wales, Sydney, New South Wales 2052, Australia.
authors.forename: Solomon
authors.initials: S
authors.lastname: Freer
authors.affiliation: Centre for Quantum Computation and Communication Technology, School of Electrical Engineering and Telecommunications, University of New South Wales, Sydney, New South Wales 2052, Australia.
authors.forename: Fay E
authors.initials: FE
authors.lastname: Hudson
authors.affiliation: Centre for Quantum Computation and Communication Technology, School of Electrical Engineering and Telecommunications, University of New South Wales, Sydney, New South Wales 2052, Australia.
authors.forename: Menno
authors.initials: M
authors.lastname: Veldhorst
authors.affiliation: Network for Computational Nanotechnology, Purdue University, West Lafayette, IN 47907, USA.
authors.forename: Rajib
authors.initials: R
authors.lastname: Rahman
authors.affiliation: Network for Computational Nanotechnology, Purdue University, West Lafayette, IN 47907, USA.
authors.forename: Gerhard
authors.initials: G
authors.lastname: Klimeck
authors.affiliation: School of Fundamental Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan.
authors.forename: Kohei M
authors.initials: KM
authors.lastname: Itoh
authors.affiliation: Centre for Quantum Computation and Communication Technology, School of Physics, University of Melbourne, Melbourne, Victoria 3010, Australia.
authors.forename: David N
authors.initials: DN
authors.lastname: Jamieson
authors.affiliation: Centre for Quantum Computation and Communication Technology, School of Physics, University of Melbourne, Melbourne, Victoria 3010, Australia.
authors.forename: Jeffrey C
authors.initials: JC
authors.lastname: McCallum
authors.affiliation: Centre for Quantum Computation and Communication Technology, School of Electrical Engineering and Telecommunications, University of New South Wales, Sydney, New South Wales 2052, Australia.
authors.forename: Andrew S
authors.initials: AS
authors.lastname: Dzurak
authors.affiliation: Centre for Quantum Computation and Communication Technology, School of Electrical Engineering and Telecommunications, University of New South Wales, Sydney, New South Wales 2052, Australia.
authors.forename: Andrea
authors.initials: A
authors.lastname: Morello
keywords: Local electrical control; Magnetic resonance; Phosphorus donor; Quantum computing; Silicon nanoelectronics; Single-atom spin qubits